Replace String comparisons with "", String() to is_empty()

Also:
- Adds two stress tests to test_string.h
- Changes to .empty() on std::strings

226 files changed, 1051 insertions, 1034 deletions

diff --git a/core/config/project_settings.cpp b/core/config/project_settings.cpp
index 0e15edc29f..c85b0866cb 100644
--- a/core/config/project_settings.cpp
+++ b/core/config/project_settings.cpp
@@ -184,7 +184,7 @@ String ProjectSettings::localize_path(const String &p_path) const {
 		String parent = path.substr(0, sep);
 
 		String plocal = localize_path(parent);
-		if (plocal == "") {
+		if (plocal.is_empty()) {
 			return "";
 		}
 		// Only strip the starting '/' from 'path' if its parent ('plocal') ends with '/'
@@ -228,13 +228,13 @@ bool ProjectSettings::get_ignore_value_in_docs(const String &p_name) const {
 
 String ProjectSettings::globalize_path(const String &p_path) const {
 	if (p_path.begins_with("res://")) {
-		if (resource_path != "") {
+		if (!resource_path.is_empty()) {
 			return p_path.replace("res:/", resource_path);
 		}
 		return p_path.replace("res://", "");
 	} else if (p_path.begins_with("user://")) {
 		String data_dir = OS::get_singleton()->get_user_data_dir();
-		if (data_dir != "") {
+		if (!data_dir.is_empty()) {
 			return p_path.replace("user:/", data_dir);
 		}
 		return p_path.replace("user://", "");
@@ -456,7 +456,7 @@ Error ProjectSettings::_setup(const String &p_path, const String &p_main_pack, b
 
 	// Attempt with a user-defined main pack first
 
-	if (p_main_pack != "") {
+	if (!p_main_pack.is_empty()) {
 		bool ok = _load_resource_pack(p_main_pack);
 		ERR_FAIL_COND_V_MSG(!ok, ERR_CANT_OPEN, "Cannot open resource pack '" + p_main_pack + "'.");
 
@@ -471,7 +471,7 @@ Error ProjectSettings::_setup(const String &p_path, const String &p_main_pack, b
 
 	String exec_path = OS::get_singleton()->get_executable_path();
 
-	if (exec_path != "") {
+	if (!exec_path.is_empty()) {
 		// We do several tests sequentially until one succeeds to find a PCK,
 		// and if so, we attempt loading it at the end.
 
@@ -523,11 +523,11 @@ Error ProjectSettings::_setup(const String &p_path, const String &p_main_pack, b
 	// Try to use the filesystem for files, according to OS.
 	// (Only Android -when reading from pck- and iOS use this.)
 
-	if (OS::get_singleton()->get_resource_dir() != "") {
+	if (!OS::get_singleton()->get_resource_dir().is_empty()) {
 		// OS will call ProjectSettings->get_resource_path which will be empty if not overridden!
 		// If the OS would rather use a specific location, then it will not be empty.
 		resource_path = OS::get_singleton()->get_resource_dir().replace("\\", "/");
-		if (resource_path != "" && resource_path[resource_path.length() - 1] == '/') {
+		if (!resource_path.is_empty() && resource_path[resource_path.length() - 1] == '/') {
 			resource_path = resource_path.substr(0, resource_path.length() - 1); // Chop end.
 		}
 
@@ -591,7 +591,7 @@ Error ProjectSettings::setup(const String &p_path, const String &p_main_pack, bo
 	Error err = _setup(p_path, p_main_pack, p_upwards, p_ignore_override);
 	if (err == OK) {
 		String custom_settings = GLOBAL_DEF("application/config/project_settings_override", "");
-		if (custom_settings != "") {
+		if (!custom_settings.is_empty()) {
 			_load_settings_text(custom_settings);
 		}
 	}
@@ -699,21 +699,21 @@ Error ProjectSettings::_load_settings_text(const String &p_path) {
 			return err;
 		}
 
-		if (assign != String()) {
-			if (section == String() && assign == "config_version") {
+		if (!assign.is_empty()) {
+			if (section.is_empty() && assign == "config_version") {
 				config_version = value;
 				if (config_version > CONFIG_VERSION) {
 					memdelete(f);
 					ERR_FAIL_V_MSG(ERR_FILE_CANT_OPEN, vformat("Can't open project at '%s', its `config_version` (%d) is from a more recent and incompatible version of the engine. Expected config version: %d.", p_path, config_version, CONFIG_VERSION));
 				}
 			} else {
-				if (section == String()) {
+				if (section.is_empty()) {
 					set(assign, value);
 				} else {
 					set(section + "/" + assign, value);
 				}
 			}
-		} else if (next_tag.name != String()) {
+		} else if (!next_tag.name.is_empty()) {
 			section = next_tag.name;
 		}
 	}
@@ -797,7 +797,7 @@ Error ProjectSettings::_save_settings_binary(const String &p_file, const Map<Str
 		count += E.value.size();
 	}
 
-	if (p_custom_features != String()) {
+	if (!p_custom_features.is_empty()) {
 		file->store_32(count + 1);
 		//store how many properties are saved, add one for custom featuers, which must always go first
 		String key = CoreStringNames::get_singleton()->_custom_features;
@@ -827,7 +827,7 @@ Error ProjectSettings::_save_settings_binary(const String &p_file, const Map<Str
 
 	for (Map<String, List<String>>::Element *E = props.front(); E; E = E->next()) {
 		for (String &key : E->get()) {
-			if (E->key() != "") {
+			if (!E->key().is_empty()) {
 				key = E->key() + "/" + key;
 			}
 			Variant value;
@@ -881,7 +881,7 @@ Error ProjectSettings::_save_settings_text(const String &p_file, const Map<Strin
 	file->store_line("");
 
 	file->store_string("config_version=" + itos(CONFIG_VERSION) + "\n");
-	if (p_custom_features != String()) {
+	if (!p_custom_features.is_empty()) {
 		file->store_string("custom_features=\"" + p_custom_features + "\"\n");
 	}
 	file->store_string("\n");
@@ -891,12 +891,12 @@ Error ProjectSettings::_save_settings_text(const String &p_file, const Map<Strin
 			file->store_string("\n");
 		}
 
-		if (E->key() != "") {
+		if (!E->key().is_empty()) {
 			file->store_string("[" + E->key() + "]\n\n");
 		}
 		for (const String &F : E->get()) {
 			String key = F;
-			if (E->key() != "") {
+			if (!E->key().is_empty()) {
 				key = E->key() + "/" + key;
 			}
 			Variant value;
@@ -924,7 +924,7 @@ Error ProjectSettings::_save_custom_bnd(const String &p_file) { // add other par
 }
 
 Error ProjectSettings::save_custom(const String &p_path, const CustomMap &p_custom, const Vector<String> &p_custom_features, bool p_merge_with_current) {
-	ERR_FAIL_COND_V_MSG(p_path == "", ERR_INVALID_PARAMETER, "Project settings save path cannot be empty.");
+	ERR_FAIL_COND_V_MSG(p_path.is_empty(), ERR_INVALID_PARAMETER, "Project settings save path cannot be empty.");
 
 	PackedStringArray project_features = has_setting("application/config/features") ? (PackedStringArray)get_setting("application/config/features") : PackedStringArray();
 	// If there is no feature list currently present, force one to generate.
@@ -933,7 +933,7 @@ Error ProjectSettings::save_custom(const String &p_path, const CustomMap &p_cust
 	}
 	// Check the rendering API.
 	const String rendering_api = has_setting("rendering/quality/driver/driver_name") ? (String)get_setting("rendering/quality/driver/driver_name") : String();
-	if (rendering_api != "") {
+	if (!rendering_api.is_empty()) {
 		// Add the rendering API as a project feature if it doesn't already exist.
 		if (!project_features.has(rendering_api)) {
 			project_features.append(rendering_api);
diff --git a/core/core_bind.cpp b/core/core_bind.cpp
index e71c7648e8..161008fd35 100644
--- a/core/core_bind.cpp
+++ b/core/core_bind.cpp
@@ -1483,7 +1483,7 @@ String Directory::get_next() {
 	ERR_FAIL_COND_V_MSG(!is_open(), "", "Directory must be opened before use.");
 
 	String next = d->get_next();
-	while (next != "" && ((_list_skip_navigational && (next == "." || next == "..")) || (_list_skip_hidden && d->current_is_hidden()))) {
+	while (!next.is_empty() && ((_list_skip_navigational && (next == "." || next == "..")) || (_list_skip_hidden && d->current_is_hidden()))) {
 		next = d->get_next();
 	}
 	return next;
@@ -1665,7 +1665,7 @@ String Marshalls::variant_to_base64(const Variant &p_var, bool p_full_objects) {
 	ERR_FAIL_COND_V_MSG(err != OK, "", "Error when trying to encode Variant.");
 
 	String ret = CryptoCore::b64_encode_str(&w[0], len);
-	ERR_FAIL_COND_V(ret == "", ret);
+	ERR_FAIL_COND_V(ret.is_empty(), ret);
 
 	return ret;
 }
@@ -1690,7 +1690,7 @@ Variant Marshalls::base64_to_variant(const String &p_str, bool p_allow_objects)
 
 String Marshalls::raw_to_base64(const Vector<uint8_t> &p_arr) {
 	String ret = CryptoCore::b64_encode_str(p_arr.ptr(), p_arr.size());
-	ERR_FAIL_COND_V(ret == "", ret);
+	ERR_FAIL_COND_V(ret.is_empty(), ret);
 	return ret;
 }
 
@@ -1714,7 +1714,7 @@ Vector<uint8_t> Marshalls::base64_to_raw(const String &p_str) {
 String Marshalls::utf8_to_base64(const String &p_str) {
 	CharString cstr = p_str.utf8();
 	String ret = CryptoCore::b64_encode_str((unsigned char *)cstr.get_data(), cstr.length());
-	ERR_FAIL_COND_V(ret == "", ret);
+	ERR_FAIL_COND_V(ret.is_empty(), ret);
 	return ret;
 }
 
diff --git a/core/debugger/local_debugger.cpp b/core/debugger/local_debugger.cpp
index 60aa3e6be7..7b397e88a3 100644
--- a/core/debugger/local_debugger.cpp
+++ b/core/debugger/local_debugger.cpp
@@ -139,7 +139,7 @@ void LocalDebugger::debug(bool p_can_continue, bool p_is_error_breakpoint) {
 		// Cache options
 		String variable_prefix = options["variable_prefix"];
 
-		if (line == "") {
+		if (line.is_empty()) {
 			print_line("\nDebugger Break, Reason: '" + script_lang->debug_get_error() + "'");
 			print_line("*Frame " + itos(current_frame) + " - " + script_lang->debug_get_stack_level_source(current_frame) + ":" + itos(script_lang->debug_get_stack_level_line(current_frame)) + " in function '" + script_lang->debug_get_stack_level_function(current_frame) + "'");
 			print_line("Enter \"help\" for assistance.");
diff --git a/core/doc_data.cpp b/core/doc_data.cpp
index 4b284a30aa..7334db5cb0 100644
--- a/core/doc_data.cpp
+++ b/core/doc_data.cpp
@@ -33,7 +33,7 @@
 void DocData::return_doc_from_retinfo(DocData::MethodDoc &p_method, const PropertyInfo &p_retinfo) {
 	if (p_retinfo.type == Variant::INT && p_retinfo.hint == PROPERTY_HINT_INT_IS_POINTER) {
 		p_method.return_type = p_retinfo.hint_string;
-		if (p_method.return_type == "") {
+		if (p_method.return_type.is_empty()) {
 			p_method.return_type = "void*";
 		} else {
 			p_method.return_type += "*";
@@ -64,7 +64,7 @@ void DocData::argument_doc_from_arginfo(DocData::ArgumentDoc &p_argument, const
 
 	if (p_arginfo.type == Variant::INT && p_arginfo.hint == PROPERTY_HINT_INT_IS_POINTER) {
 		p_argument.type = p_arginfo.hint_string;
-		if (p_argument.type == "") {
+		if (p_argument.type.is_empty()) {
 			p_argument.type = "void*";
 		} else {
 			p_argument.type += "*";
diff --git a/core/extension/extension_api_dump.cpp b/core/extension/extension_api_dump.cpp
index 03b2426370..fc74293d0d 100644
--- a/core/extension/extension_api_dump.cpp
+++ b/core/extension/extension_api_dump.cpp
@@ -40,7 +40,7 @@
 
 static String get_type_name(const PropertyInfo &p_info) {
 	if (p_info.type == Variant::INT && (p_info.hint == PROPERTY_HINT_INT_IS_POINTER)) {
-		if (p_info.hint_string == "") {
+		if (p_info.hint_string.is_empty()) {
 			return "void*";
 		} else {
 			return p_info.hint_string + "*";
@@ -340,7 +340,7 @@ Dictionary NativeExtensionAPIDump::generate_extension_api() {
 			int value = CoreConstants::get_global_constant_value(i);
 			String enum_name = CoreConstants::get_global_constant_enum(i);
 			String name = CoreConstants::get_global_constant_name(i);
-			if (enum_name != String()) {
+			if (!enum_name.is_empty()) {
 				enum_list[enum_name].push_back(Pair<String, int>(name, value));
 			} else {
 				Dictionary d;
diff --git a/core/extension/native_extension.cpp b/core/extension/native_extension.cpp
index ae7620fec4..cfd3ac8099 100644
--- a/core/extension/native_extension.cpp
+++ b/core/extension/native_extension.cpp
@@ -397,7 +397,7 @@ RES NativeExtensionResourceLoader::load(const String &p_path, const String &p_or
 		}
 	}
 
-	if (library_path == String()) {
+	if (library_path.is_empty()) {
 		if (r_error) {
 			*r_error = ERR_FILE_NOT_FOUND;
 		}
diff --git a/core/extension/native_extension_manager.cpp b/core/extension/native_extension_manager.cpp
index c8755250d5..043843ea31 100644
--- a/core/extension/native_extension_manager.cpp
+++ b/core/extension/native_extension_manager.cpp
@@ -115,7 +115,7 @@ void NativeExtensionManager::load_extensions() {
 	FileAccessRef f = FileAccess::open(NativeExtension::get_extension_list_config_file(), FileAccess::READ);
 	while (f && !f->eof_reached()) {
 		String s = f->get_line().strip_edges();
-		if (s != String()) {
+		if (!s.is_empty()) {
 			LoadStatus err = load_extension(s);
 			ERR_CONTINUE_MSG(err == LOAD_STATUS_FAILED, "Error loading extension: " + s);
 		}
diff --git a/core/input/input.cpp b/core/input/input.cpp
index b72d980681..3dfe73ab8e 100644
--- a/core/input/input.cpp
+++ b/core/input/input.cpp
@@ -403,7 +403,7 @@ void Input::joy_connection_changed(int p_idx, bool p_connected, String p_name, S
 
 	if (p_connected) {
 		String uidname = p_guid;
-		if (p_guid == "") {
+		if (p_guid.is_empty()) {
 			int uidlen = MIN(p_name.length(), 16);
 			for (int i = 0; i < uidlen; i++) {
 				uidname = uidname + _hex_str(p_name[i]);
@@ -1249,7 +1249,7 @@ void Input::parse_mapping(String p_mapping) {
 
 	int idx = 1;
 	while (++idx < entry.size()) {
-		if (entry[idx] == "") {
+		if (entry[idx].is_empty()) {
 			continue;
 		}
 
@@ -1420,10 +1420,10 @@ Input::Input() {
 
 	// If defined, parse SDL_GAMECONTROLLERCONFIG for possible new mappings/overrides.
 	String env_mapping = OS::get_singleton()->get_environment("SDL_GAMECONTROLLERCONFIG");
-	if (env_mapping != "") {
+	if (!env_mapping.is_empty()) {
 		Vector<String> entries = env_mapping.split("\n");
 		for (int i = 0; i < entries.size(); i++) {
-			if (entries[i] == "") {
+			if (entries[i].is_empty()) {
 				continue;
 			}
 			parse_mapping(entries[i]);
diff --git a/core/input/input_event.cpp b/core/input/input_event.cpp
index ccde8838e1..7c98fa9540 100644
--- a/core/input/input_event.cpp
+++ b/core/input/input_event.cpp
@@ -360,12 +360,12 @@ String InputEventKey::as_text() const {
 		kc = keycode_get_string(keycode);
 	}
 
-	if (kc == String()) {
+	if (kc.is_empty()) {
 		return kc;
 	}
 
 	String mods_text = InputEventWithModifiers::as_text();
-	return mods_text == "" ? kc : mods_text + "+" + kc;
+	return mods_text.is_empty() ? kc : mods_text + "+" + kc;
 }
 
 String InputEventKey::to_string() {
@@ -382,7 +382,7 @@ String InputEventKey::to_string() {
 	}
 
 	String mods = InputEventWithModifiers::as_text();
-	mods = mods == "" ? TTR("none") : mods;
+	mods = mods.is_empty() ? TTR("none") : mods;
 
 	return vformat("InputEventKey: keycode=%s, mods=%s, physical=%s, pressed=%s, echo=%s", kc, mods, physical, p, e);
 }
@@ -634,7 +634,7 @@ static const char *_mouse_button_descriptions[9] = {
 String InputEventMouseButton::as_text() const {
 	// Modifiers
 	String mods_text = InputEventWithModifiers::as_text();
-	String full_string = mods_text == "" ? "" : mods_text + "+";
+	String full_string = mods_text.is_empty() ? "" : mods_text + "+";
 
 	// Button
 	MouseButton idx = get_button_index();
@@ -687,7 +687,7 @@ String InputEventMouseButton::to_string() {
 	}
 
 	String mods = InputEventWithModifiers::as_text();
-	mods = mods == "" ? TTR("none") : mods;
+	mods = mods.is_empty() ? TTR("none") : mods;
 
 	// Work around the fact vformat can only take 5 substitutions but 6 need to be passed.
 	String index_and_mods = vformat("button_index=%s, mods=%s", button_index, mods);
diff --git a/core/input/input_map.cpp b/core/input/input_map.cpp
index 84e1313756..183a2c3e68 100644
--- a/core/input/input_map.cpp
+++ b/core/input/input_map.cpp
@@ -718,7 +718,7 @@ const OrderedHashMap<String, List<Ref<InputEvent>>> &InputMap::get_builtins_with
 		String name = split[0];
 		String override_for = split.size() > 1 ? split[1] : String();
 
-		if (override_for != String() && OS::get_singleton()->has_feature(override_for)) {
+		if (!override_for.is_empty() && OS::get_singleton()->has_feature(override_for)) {
 			builtins_with_overrides[name].push_back(override_for);
 		}
 	}
@@ -730,12 +730,12 @@ const OrderedHashMap<String, List<Ref<InputEvent>>> &InputMap::get_builtins_with
 		String name = split[0];
 		String override_for = split.size() > 1 ? split[1] : String();
 
-		if (builtins_with_overrides.has(name) && override_for == String()) {
+		if (builtins_with_overrides.has(name) && override_for.is_empty()) {
 			// Builtin has an override but this particular one is not an override, so skip.
 			continue;
 		}
 
-		if (override_for != String() && !OS::get_singleton()->has_feature(override_for)) {
+		if (!override_for.is_empty() && !OS::get_singleton()->has_feature(override_for)) {
 			// OS does not support this override - skip.
 			continue;
 		}
diff --git a/core/io/config_file.cpp b/core/io/config_file.cpp
index 33f992e153..b2300574f8 100644
--- a/core/io/config_file.cpp
+++ b/core/io/config_file.cpp
@@ -183,7 +183,7 @@ Error ConfigFile::_internal_save(FileAccess *file) {
 		if (E != values.front()) {
 			file->store_string("\n");
 		}
-		if (E.key() != "") {
+		if (!E.key().is_empty()) {
 			file->store_string("[" + E.key() + "]\n\n");
 		}
 
@@ -287,9 +287,9 @@ Error ConfigFile::_parse(const String &p_path, VariantParser::Stream *p_stream)
 			return err;
 		}
 
-		if (assign != String()) {
+		if (!assign.is_empty()) {
 			set_value(section, assign, value);
-		} else if (next_tag.name != String()) {
+		} else if (!next_tag.name.is_empty()) {
 			section = next_tag.name;
 		}
 	}
diff --git a/core/io/dir_access.cpp b/core/io/dir_access.cpp
index 3bff0a3fd5..d804e67493 100644
--- a/core/io/dir_access.cpp
+++ b/core/io/dir_access.cpp
@@ -79,7 +79,7 @@ static Error _erase_recursive(DirAccess *da) {
 
 	da->list_dir_begin();
 	String n = da->get_next();
-	while (n != String()) {
+	while (!n.is_empty()) {
 		if (n != "." && n != "..") {
 			if (da->current_is_dir()) {
 				dirs.push_back(n);
@@ -183,7 +183,7 @@ String DirAccess::fix_path(String p_path) const {
 			if (ProjectSettings::get_singleton()) {
 				if (p_path.begins_with("res://")) {
 					String resource_path = ProjectSettings::get_singleton()->get_resource_path();
-					if (resource_path != "") {
+					if (!resource_path.is_empty()) {
 						return p_path.replace_first("res:/", resource_path);
 					}
 					return p_path.replace_first("res://", "");
@@ -194,7 +194,7 @@ String DirAccess::fix_path(String p_path) const {
 		case ACCESS_USERDATA: {
 			if (p_path.begins_with("user://")) {
 				String data_dir = OS::get_singleton()->get_user_data_dir();
-				if (data_dir != "") {
+				if (!data_dir.is_empty()) {
 					return p_path.replace_first("user:/", data_dir);
 				}
 				return p_path.replace_first("user://", "");
@@ -337,7 +337,7 @@ Error DirAccess::_copy_dir(DirAccess *p_target_da, String p_to, int p_chmod_flag
 	String curdir = get_current_dir();
 	list_dir_begin();
 	String n = get_next();
-	while (n != String()) {
+	while (!n.is_empty()) {
 		if (n != "." && n != "..") {
 			if (p_copy_links && is_link(get_current_dir().plus_file(n))) {
 				create_link(read_link(get_current_dir().plus_file(n)), p_to + n);
diff --git a/core/io/file_access.cpp b/core/io/file_access.cpp
index e6e79dff8a..1b9c43b155 100644
--- a/core/io/file_access.cpp
+++ b/core/io/file_access.cpp
@@ -127,7 +127,7 @@ String FileAccess::fix_path(const String &p_path) const {
 			if (ProjectSettings::get_singleton()) {
 				if (r_path.begins_with("res://")) {
 					String resource_path = ProjectSettings::get_singleton()->get_resource_path();
-					if (resource_path != "") {
+					if (!resource_path.is_empty()) {
 						return r_path.replace("res:/", resource_path);
 					}
 					return r_path.replace("res://", "");
@@ -138,7 +138,7 @@ String FileAccess::fix_path(const String &p_path) const {
 		case ACCESS_USERDATA: {
 			if (r_path.begins_with("user://")) {
 				String data_dir = OS::get_singleton()->get_user_data_dir();
-				if (data_dir != "") {
+				if (!data_dir.is_empty()) {
 					return r_path.replace("user:/", data_dir);
 				}
 				return r_path.replace("user://", "");
diff --git a/core/io/file_access_pack.cpp b/core/io/file_access_pack.cpp
index b2832b2a75..e343706e66 100644
--- a/core/io/file_access_pack.cpp
+++ b/core/io/file_access_pack.cpp
@@ -459,7 +459,7 @@ PackedData::PackedDir *DirAccessPack::_find_dir(String p_dir) {
 
 	nd = nd.simplify_path();
 
-	if (nd == "") {
+	if (nd.is_empty()) {
 		nd = ".";
 	}
 
diff --git a/core/io/logger.cpp b/core/io/logger.cpp
index 8a8bdf07d3..3330bb8149 100644
--- a/core/io/logger.cpp
+++ b/core/io/logger.cpp
@@ -136,7 +136,7 @@ void RotatedFileLogger::clear_old_backups() {
 	da->list_dir_begin();
 	String f = da->get_next();
 	Set<String> backups;
-	while (f != String()) {
+	while (!f.is_empty()) {
 		if (!da->current_is_dir() && f.begins_with(basename) && f.get_extension() == extension && f != base_path.get_file()) {
 			backups.insert(f);
 		}
@@ -163,7 +163,7 @@ void RotatedFileLogger::rotate_file() {
 		if (max_files > 1) {
 			String timestamp = Time::get_singleton()->get_datetime_string_from_system().replace(":", ".");
 			String backup_name = base_path.get_basename() + timestamp;
-			if (base_path.get_extension() != String()) {
+			if (!base_path.get_extension().is_empty()) {
 				backup_name += "." + base_path.get_extension();
 			}
 
diff --git a/core/io/marshalls.cpp b/core/io/marshalls.cpp
index e7d5b78d14..7c06a354d1 100644
--- a/core/io/marshalls.cpp
+++ b/core/io/marshalls.cpp
@@ -562,7 +562,7 @@ Error decode_variant(Variant &r_variant, const uint8_t *p_buffer, int p_len, int
 					return err;
 				}
 
-				if (str == String()) {
+				if (str.is_empty()) {
 					r_variant = (Object *)nullptr;
 				} else {
 					Object *obj = ClassDB::instantiate(str);
diff --git a/core/io/resource.cpp b/core/io/resource.cpp
index 972076e397..8da4e936e3 100644
--- a/core/io/resource.cpp
+++ b/core/io/resource.cpp
@@ -52,7 +52,7 @@ void Resource::set_path(const String &p_path, bool p_take_over) {
 		return;
 	}
 
-	if (path_cache != "") {
+	if (!path_cache.is_empty()) {
 		ResourceCache::lock.write_lock();
 		ResourceCache::resources.erase(path_cache);
 		ResourceCache::lock.write_unlock();
@@ -82,7 +82,7 @@ void Resource::set_path(const String &p_path, bool p_take_over) {
 	}
 	path_cache = p_path;
 
-	if (path_cache != "") {
+	if (!path_cache.is_empty()) {
 		ResourceCache::lock.write_lock();
 		ResourceCache::resources[path_cache] = this;
 		ResourceCache::lock.write_unlock();
@@ -383,7 +383,7 @@ bool Resource::is_translation_remapped() const {
 #ifdef TOOLS_ENABLED
 //helps keep IDs same number when loading/saving scenes. -1 clears ID and it Returns -1 when no id stored
 void Resource::set_id_for_path(const String &p_path, const String &p_id) {
-	if (p_id == "") {
+	if (p_id.is_empty()) {
 		ResourceCache::path_cache_lock.write_lock();
 		ResourceCache::resource_path_cache[p_path].erase(get_path());
 		ResourceCache::path_cache_lock.write_unlock();
@@ -434,7 +434,7 @@ Resource::Resource() :
 		remapped_list(this) {}
 
 Resource::~Resource() {
-	if (path_cache != "") {
+	if (!path_cache.is_empty()) {
 		ResourceCache::lock.write_lock();
 		ResourceCache::resources.erase(path_cache);
 		ResourceCache::lock.write_unlock();
diff --git a/core/io/resource_format_binary.cpp b/core/io/resource_format_binary.cpp
index a5a195f859..bd040f303d 100644
--- a/core/io/resource_format_binary.cpp
+++ b/core/io/resource_format_binary.cpp
@@ -727,7 +727,7 @@ Error ResourceLoaderBinary::load() {
 			}
 
 			res = RES(r);
-			if (path != String() && cache_mode != ResourceFormatLoader::CACHE_MODE_IGNORE) {
+			if (!path.is_empty() && cache_mode != ResourceFormatLoader::CACHE_MODE_IGNORE) {
 				r->set_path(path, cache_mode == ResourceFormatLoader::CACHE_MODE_REPLACE); //if got here because the resource with same path has different type, replace it
 			}
 			r->set_scene_unique_id(id);
@@ -829,7 +829,7 @@ void ResourceLoaderBinary::get_dependencies(FileAccess *p_f, List<String> *p_dep
 			dep = external_resources[i].path;
 		}
 
-		if (p_add_types && external_resources[i].type != String()) {
+		if (p_add_types && !external_resources[i].type.is_empty()) {
 			dep += "::" + external_resources[i].type;
 		}
 
@@ -1026,7 +1026,7 @@ RES ResourceFormatLoaderBinary::load(const String &p_path, const String &p_origi
 	loader.cache_mode = p_cache_mode;
 	loader.use_sub_threads = p_use_sub_threads;
 	loader.progress = r_progress;
-	String path = p_original_path != "" ? p_original_path : p_path;
+	String path = !p_original_path.is_empty() ? p_original_path : p_path;
 	loader.local_path = ProjectSettings::get_singleton()->localize_path(path);
 	loader.res_path = loader.local_path;
 	//loader.set_local_path( Globals::get_singleton()->localize_path(p_path) );
@@ -1045,7 +1045,7 @@ RES ResourceFormatLoaderBinary::load(const String &p_path, const String &p_origi
 }
 
 void ResourceFormatLoaderBinary::get_recognized_extensions_for_type(const String &p_type, List<String> *p_extensions) const {
-	if (p_type == "") {
+	if (p_type.is_empty()) {
 		get_recognized_extensions(p_extensions);
 		return;
 	}
@@ -1979,7 +1979,7 @@ Error ResourceFormatSaverBinaryInstance::save(const String &p_path, const RES &p
 
 	for (RES &r : saved_resources) {
 		if (r->is_built_in()) {
-			if (r->get_scene_unique_id() != "") {
+			if (!r->get_scene_unique_id().is_empty()) {
 				if (used_unique_ids.has(r->get_scene_unique_id())) {
 					r->set_scene_unique_id("");
 				} else {
@@ -1993,7 +1993,7 @@ Error ResourceFormatSaverBinaryInstance::save(const String &p_path, const RES &p
 	int res_index = 0;
 	for (RES &r : saved_resources) {
 		if (r->is_built_in()) {
-			if (r->get_scene_unique_id() == "") {
+			if (r->get_scene_unique_id().is_empty()) {
 				String new_id;
 
 				while (true) {
diff --git a/core/io/resource_importer.cpp b/core/io/resource_importer.cpp
index cd44c537a8..fc5c434e37 100644
--- a/core/io/resource_importer.cpp
+++ b/core/io/resource_importer.cpp
@@ -78,8 +78,8 @@ Error ResourceFormatImporter::_get_path_and_type(const String &p_path, PathAndTy
 			return err;
 		}
 
-		if (assign != String()) {
-			if (!path_found && assign.begins_with("path.") && r_path_and_type.path == String()) {
+		if (!assign.is_empty()) {
+			if (!path_found && assign.begins_with("path.") && r_path_and_type.path.is_empty()) {
 				String feature = assign.get_slicec('.', 1);
 				if (OS::get_singleton()->has_feature(feature)) {
 					r_path_and_type.path = value;
@@ -112,7 +112,7 @@ Error ResourceFormatImporter::_get_path_and_type(const String &p_path, PathAndTy
 
 	memdelete(f);
 
-	if (r_path_and_type.path == String() || r_path_and_type.type == String()) {
+	if (r_path_and_type.path.is_empty() || r_path_and_type.type.is_empty()) {
 		return ERR_FILE_CORRUPT;
 	}
 	return OK;
@@ -158,7 +158,7 @@ void ResourceFormatImporter::get_recognized_extensions(List<String> *p_extension
 }
 
 void ResourceFormatImporter::get_recognized_extensions_for_type(const String &p_type, List<String> *p_extensions) const {
-	if (p_type == "") {
+	if (p_type.is_empty()) {
 		get_recognized_extensions(p_extensions);
 		return;
 	}
@@ -167,7 +167,7 @@ void ResourceFormatImporter::get_recognized_extensions_for_type(const String &p_
 
 	for (int i = 0; i < importers.size(); i++) {
 		String res_type = importers[i]->get_resource_type();
-		if (res_type == String()) {
+		if (res_type.is_empty()) {
 			continue;
 		}
 
@@ -246,7 +246,7 @@ int ResourceFormatImporter::get_import_order(const String &p_path) const {
 bool ResourceFormatImporter::handles_type(const String &p_type) const {
 	for (int i = 0; i < importers.size(); i++) {
 		String res_type = importers[i]->get_resource_type();
-		if (res_type == String()) {
+		if (res_type.is_empty()) {
 			continue;
 		}
 		if (ClassDB::is_parent_class(res_type, p_type)) {
@@ -300,7 +300,7 @@ void ResourceFormatImporter::get_internal_resource_path_list(const String &p_pat
 			return;
 		}
 
-		if (assign != String()) {
+		if (!assign.is_empty()) {
 			if (assign.begins_with("path.")) {
 				r_paths->push_back(value);
 			} else if (assign == "path") {
diff --git a/core/io/resource_loader.cpp b/core/io/resource_loader.cpp
index 2198761c2a..f65570bd60 100644
--- a/core/io/resource_loader.cpp
+++ b/core/io/resource_loader.cpp
@@ -52,7 +52,7 @@ bool ResourceFormatLoader::recognize_path(const String &p_path, const String &p_
 	String extension = p_path.get_extension();
 
 	List<String> extensions;
-	if (p_for_type == String()) {
+	if (p_for_type.is_empty()) {
 		get_recognized_extensions(&extensions);
 	} else {
 		get_recognized_extensions_for_type(p_for_type, &extensions);
@@ -96,7 +96,7 @@ ResourceUID::ID ResourceFormatLoader::get_resource_uid(const String &p_path) con
 }
 
 void ResourceFormatLoader::get_recognized_extensions_for_type(const String &p_type, List<String> *p_extensions) const {
-	if (p_type == "" || handles_type(p_type)) {
+	if (p_type.is_empty() || handles_type(p_type)) {
 		get_recognized_extensions(p_extensions);
 	}
 }
@@ -194,7 +194,7 @@ RES ResourceLoader::_load(const String &p_path, const String &p_original_path, c
 			continue;
 		}
 		found = true;
-		RES res = loader[i]->load(p_path, p_original_path != String() ? p_original_path : p_path, r_error, p_use_sub_threads, r_progress, p_cache_mode);
+		RES res = loader[i]->load(p_path, !p_original_path.is_empty() ? p_original_path : p_path, r_error, p_use_sub_threads, r_progress, p_cache_mode);
 		if (res.is_null()) {
 			continue;
 		}
@@ -289,7 +289,7 @@ Error ResourceLoader::load_threaded_request(const String &p_path, const String &
 
 	thread_load_mutex->lock();
 
-	if (p_source_resource != String()) {
+	if (!p_source_resource.is_empty()) {
 		//must be loading from this resource
 		if (!thread_load_tasks.has(p_source_resource)) {
 			thread_load_mutex->unlock();
@@ -310,7 +310,7 @@ Error ResourceLoader::load_threaded_request(const String &p_path, const String &
 
 	if (thread_load_tasks.has(local_path)) {
 		thread_load_tasks[local_path].requests++;
-		if (p_source_resource != String()) {
+		if (!p_source_resource.is_empty()) {
 			thread_load_tasks[p_source_resource].sub_tasks.insert(local_path);
 		}
 		thread_load_mutex->unlock();
@@ -354,7 +354,7 @@ Error ResourceLoader::load_threaded_request(const String &p_path, const String &
 			ResourceCache::lock.read_unlock();
 		}
 
-		if (p_source_resource != String()) {
+		if (!p_source_resource.is_empty()) {
 			thread_load_tasks[p_source_resource].sub_tasks.insert(local_path);
 		}
 
@@ -574,7 +574,7 @@ RES ResourceLoader::load(const String &p_path, const String &p_type_hint, Resour
 		bool xl_remapped = false;
 		String path = _path_remap(local_path, &xl_remapped);
 
-		if (path == "") {
+		if (path.is_empty()) {
 			ERR_FAIL_V_MSG(RES(), "Remapping '" + local_path + "' failed.");
 		}
 
@@ -776,7 +776,7 @@ String ResourceLoader::get_resource_type(const String &p_path) {
 
 	for (int i = 0; i < loader_count; i++) {
 		String result = loader[i]->get_resource_type(local_path);
-		if (result != "") {
+		if (!result.is_empty()) {
 			return result;
 		}
 	}
diff --git a/core/io/translation_loader_po.cpp b/core/io/translation_loader_po.cpp
index 83d575cee8..cb7d67a726 100644
--- a/core/io/translation_loader_po.cpp
+++ b/core/io/translation_loader_po.cpp
@@ -87,7 +87,7 @@ RES TranslationLoaderPO::load_translation(FileAccess *f, Error *r_error) {
 
 			// In PO file, "msgctxt" appears before "msgid". If we encounter a "msgctxt", we add what we have read
 			// and set "entered_context" to true to prevent adding twice.
-			if (!skip_this && msg_id != "") {
+			if (!skip_this && !msg_id.is_empty()) {
 				if (status == STATUS_READING_STRING) {
 					translation->add_message(msg_id, msg_str, msg_context);
 				} else if (status == STATUS_READING_PLURAL) {
@@ -125,7 +125,7 @@ RES TranslationLoaderPO::load_translation(FileAccess *f, Error *r_error) {
 				ERR_FAIL_V_MSG(RES(), "Unexpected 'msgid', was expecting 'msgstr' while parsing: " + path + ":" + itos(line));
 			}
 
-			if (msg_id != "") {
+			if (!msg_id.is_empty()) {
 				if (!skip_this && !entered_context) {
 					if (status == STATUS_READING_STRING) {
 						translation->add_message(msg_id, msg_str, msg_context);
@@ -137,7 +137,7 @@ RES TranslationLoaderPO::load_translation(FileAccess *f, Error *r_error) {
 						translation->add_plural_message(msg_id, msgs_plural, msg_context);
 					}
 				}
-			} else if (config == "") {
+			} else if (config.is_empty()) {
 				config = msg_str;
 				// Record plural rule.
 				int p_start = config.find("Plural-Forms");
@@ -178,7 +178,7 @@ RES TranslationLoaderPO::load_translation(FileAccess *f, Error *r_error) {
 			status = STATUS_READING_STRING;
 		}
 
-		if (l == "" || l.begins_with("#")) {
+		if (l.is_empty() || l.begins_with("#")) {
 			if (l.find("fuzzy") != -1) {
 				skip_next = true;
 			}
@@ -236,15 +236,15 @@ RES TranslationLoaderPO::load_translation(FileAccess *f, Error *r_error) {
 
 	// Add the last set of data from last iteration.
 	if (status == STATUS_READING_STRING) {
-		if (msg_id != "") {
+		if (!msg_id.is_empty()) {
 			if (!skip_this) {
 				translation->add_message(msg_id, msg_str, msg_context);
 			}
-		} else if (config == "") {
+		} else if (config.is_empty()) {
 			config = msg_str;
 		}
 	} else if (status == STATUS_READING_PLURAL) {
-		if (!skip_this && msg_id != "") {
+		if (!skip_this && !msg_id.is_empty()) {
 			if (plural_index != plural_forms - 1) {
 				memdelete(f);
 				ERR_FAIL_V_MSG(RES(), "Number of 'msgstr[]' doesn't match with number of plural forms: " + path + ":" + itos(line));
@@ -253,7 +253,7 @@ RES TranslationLoaderPO::load_translation(FileAccess *f, Error *r_error) {
 		}
 	}
 
-	ERR_FAIL_COND_V_MSG(config == "", RES(), "No config found in file: " + path + ".");
+	ERR_FAIL_COND_V_MSG(config.is_empty(), RES(), "No config found in file: " + path + ".");
 
 	Vector<String> configs = config.split("\n");
 	for (int i = 0; i < configs.size(); i++) {
diff --git a/core/object/class_db.cpp b/core/object/class_db.cpp
index ac628acf81..bbd3b7b8de 100644
--- a/core/object/class_db.cpp
+++ b/core/object/class_db.cpp
@@ -731,7 +731,7 @@ void ClassDB::bind_integer_constant(const StringName &p_class, const StringName
 	type->constant_map[p_name] = p_constant;
 
 	String enum_name = p_enum;
-	if (enum_name != String()) {
+	if (!enum_name.is_empty()) {
 		if (enum_name.find(".") != -1) {
 			enum_name = enum_name.get_slicec('.', 1);
 		}
diff --git a/core/object/object.cpp b/core/object/object.cpp
index 3942dddf52..14d4e0bee6 100644
--- a/core/object/object.cpp
+++ b/core/object/object.cpp
@@ -990,7 +990,7 @@ void Object::get_meta_list(List<StringName> *p_list) const {
 }
 
 void Object::add_user_signal(const MethodInfo &p_signal) {
-	ERR_FAIL_COND_MSG(p_signal.name == "", "Signal name cannot be empty.");
+	ERR_FAIL_COND_MSG(p_signal.name.is_empty(), "Signal name cannot be empty.");
 	ERR_FAIL_COND_MSG(ClassDB::has_signal(get_class_name(), p_signal.name), "User signal's name conflicts with a built-in signal of '" + get_class_name() + "'.");
 	ERR_FAIL_COND_MSG(signal_map.has(p_signal.name), "Trying to add already existing signal '" + p_signal.name + "'.");
 	SignalData s;
@@ -1253,7 +1253,7 @@ void Object::get_signal_list(List<MethodInfo> *p_signals) const {
 	const StringName *S = nullptr;
 
 	while ((S = signal_map.next(S))) {
-		if (signal_map[*S].user.name != "") {
+		if (!signal_map[*S].user.name.is_empty()) {
 			//user signal
 			p_signals->push_back(signal_map[*S].user);
 		}
@@ -1680,7 +1680,7 @@ void Object::get_translatable_strings(List<String> *p_strings) const {
 
 		String text = get(E.name);
 
-		if (text == "") {
+		if (text.is_empty()) {
 			continue;
 		}
 
diff --git a/core/object/object.h b/core/object/object.h
index 795bbf27e8..fc6e6a3660 100644
--- a/core/object/object.h
+++ b/core/object/object.h
@@ -352,7 +352,7 @@ public:
 	static String get_category_static() {                                                                                                        \
 		String category = m_inherits::get_category_static();                                                                                     \
 		if (_get_category != m_inherits::_get_category) {                                                                                        \
-			if (category != "") {                                                                                                                \
+			if (!category.is_empty()) {                                                                                                          \
 				category += "/";                                                                                                                 \
 			}                                                                                                                                    \
 			category += _get_category();                                                                                                         \
diff --git a/core/os/os.cpp b/core/os/os.cpp
index 03e251880f..c8b8931919 100644
--- a/core/os/os.cpp
+++ b/core/os/os.cpp
@@ -190,8 +190,8 @@ static void _OS_printres(Object *p_obj) {
 }
 
 void OS::print_all_resources(String p_to_file) {
-	ERR_FAIL_COND(p_to_file != "" && _OSPRF);
-	if (p_to_file != "") {
+	ERR_FAIL_COND(!p_to_file.is_empty() && _OSPRF);
+	if (!p_to_file.is_empty()) {
 		Error err;
 		_OSPRF = FileAccess::open(p_to_file, FileAccess::WRITE, &err);
 		if (err != OK) {
@@ -202,7 +202,7 @@ void OS::print_all_resources(String p_to_file) {
 
 	ObjectDB::debug_objects(_OS_printres);
 
-	if (p_to_file != "") {
+	if (!p_to_file.is_empty()) {
 		if (_OSPRF) {
 			memdelete(_OSPRF);
 		}
diff --git a/core/string/node_path.cpp b/core/string/node_path.cpp
index 7ab85ac9d0..bb9a44ccaf 100644
--- a/core/string/node_path.cpp
+++ b/core/string/node_path.cpp
@@ -368,7 +368,7 @@ NodePath::NodePath(const String &p_path) {
 		for (int i = from; i <= path.length(); i++) {
 			if (path[i] == ':' || path[i] == 0) {
 				String str = path.substr(from, i - from);
-				if (str == "") {
+				if (str.is_empty()) {
 					if (path[i] == 0) {
 						continue; // Allow end-of-path :
 					}
diff --git a/core/string/string_builder.cpp b/core/string/string_builder.cpp
index 834c87c845..45cc2f3280 100644
--- a/core/string/string_builder.cpp
+++ b/core/string/string_builder.cpp
@@ -33,7 +33,7 @@
 #include <string.h>
 
 StringBuilder &StringBuilder::append(const String &p_string) {
-	if (p_string == String()) {
+	if (p_string.is_empty()) {
 		return *this;
 	}
 
diff --git a/core/string/string_name.cpp b/core/string/string_name.cpp
index 9024f60dae..0e3482e873 100644
--- a/core/string/string_name.cpp
+++ b/core/string/string_name.cpp
@@ -310,7 +310,7 @@ StringName::StringName(const String &p_name, bool p_static) {
 
 	ERR_FAIL_COND(!configured);
 
-	if (p_name == String()) {
+	if (p_name.is_empty()) {
 		return;
 	}
 
@@ -434,7 +434,7 @@ StringName StringName::search(const char32_t *p_name) {
 }
 
 StringName StringName::search(const String &p_name) {
-	ERR_FAIL_COND_V(p_name == "", StringName());
+	ERR_FAIL_COND_V(p_name.is_empty(), StringName());
 
 	MutexLock lock(mutex);
 
diff --git a/core/string/translation.cpp b/core/string/translation.cpp
index b98aad9b58..73f789b041 100644
--- a/core/string/translation.cpp
+++ b/core/string/translation.cpp
@@ -1287,7 +1287,7 @@ bool TranslationServer::_load_translations(const String &p_from) {
 void TranslationServer::setup() {
 	String test = GLOBAL_DEF("internationalization/locale/test", "");
 	test = test.strip_edges();
-	if (test != "") {
+	if (!test.is_empty()) {
 		set_locale(test);
 	} else {
 		set_locale(OS::get_singleton()->get_locale());
diff --git a/core/string/ustring.cpp b/core/string/ustring.cpp
index 8d1f610578..ac8e2ece12 100644
--- a/core/string/ustring.cpp
+++ b/core/string/ustring.cpp
@@ -4283,7 +4283,7 @@ bool String::is_valid_filename() const {
 		return false;
 	}
 
-	if (stripped == String()) {
+	if (stripped.is_empty()) {
 		return false;
 	}
 
@@ -4902,7 +4902,7 @@ String DTRN(const String &p_text, const String &p_text_plural, int p_n, const St
 String RTR(const String &p_text, const String &p_context) {
 	if (TranslationServer::get_singleton()) {
 		String rtr = TranslationServer::get_singleton()->tool_translate(p_text, p_context);
-		if (rtr == String() || rtr == p_text) {
+		if (rtr.is_empty() || rtr == p_text) {
 			return TranslationServer::get_singleton()->translate(p_text, p_context);
 		} else {
 			return rtr;
@@ -4915,7 +4915,7 @@ String RTR(const String &p_text, const String &p_context) {
 String RTRN(const String &p_text, const String &p_text_plural, int p_n, const String &p_context) {
 	if (TranslationServer::get_singleton()) {
 		String rtr = TranslationServer::get_singleton()->tool_translate_plural(p_text, p_text_plural, p_n, p_context);
-		if (rtr == String() || rtr == p_text || rtr == p_text_plural) {
+		if (rtr.is_empty() || rtr == p_text || rtr == p_text_plural) {
 			return TranslationServer::get_singleton()->translate_plural(p_text, p_text_plural, p_n, p_context);
 		} else {
 			return rtr;
diff --git a/core/variant/variant_parser.cpp b/core/variant/variant_parser.cpp
index 3c19c2c706..47561f4621 100644
--- a/core/variant/variant_parser.cpp
+++ b/core/variant/variant_parser.cpp
@@ -1598,14 +1598,14 @@ Error VariantWriter::write(const Variant &p_variant, StoreStringFunc p_store_str
 				}
 
 				//try path because it's a file
-				if (res_text == String() && res->get_path().is_resource_file()) {
+				if (res_text.is_empty() && res->get_path().is_resource_file()) {
 					//external resource
 					String path = res->get_path();
 					res_text = "Resource(\"" + path + "\")";
 				}
 
 				//could come up with some sort of text
-				if (res_text != String()) {
+				if (!res_text.is_empty()) {
 					p_store_string_func(p_store_string_ud, res_text);
 					break;
 				}
diff --git a/drivers/gles3/rasterizer_storage_gles3.cpp b/drivers/gles3/rasterizer_storage_gles3.cpp
index 4759a2b0d0..f19b4a0ce2 100644
--- a/drivers/gles3/rasterizer_storage_gles3.cpp
+++ b/drivers/gles3/rasterizer_storage_gles3.cpp
@@ -1555,7 +1555,7 @@ void RasterizerStorageGLES3::_update_shader(Shader *p_shader) const {
 
 	p_shader->uniforms.clear();
 
-	if (p_shader->code == String()) {
+	if (p_shader->code.is_empty()) {
 		return; //just invalid, but no error
 	}
 
diff --git a/drivers/unix/dir_access_unix.cpp b/drivers/unix/dir_access_unix.cpp
index 1754b47c85..be993b88e5 100644
--- a/drivers/unix/dir_access_unix.cpp
+++ b/drivers/unix/dir_access_unix.cpp
@@ -342,7 +342,7 @@ Error DirAccessUnix::change_dir(String p_dir) {
 	}
 
 	String base = _get_root_path();
-	if (base != String() && !try_dir.begins_with(base)) {
+	if (!base.is_empty() && !try_dir.begins_with(base)) {
 		ERR_FAIL_COND_V(getcwd(real_current_dir_name, 2048) == nullptr, ERR_BUG);
 		String new_dir;
 		new_dir.parse_utf8(real_current_dir_name);
@@ -360,7 +360,7 @@ Error DirAccessUnix::change_dir(String p_dir) {
 
 String DirAccessUnix::get_current_dir(bool p_include_drive) {
 	String base = _get_root_path();
-	if (base != "") {
+	if (!base.is_empty()) {
 		String bd = current_dir.replace_first(base, "");
 		if (bd.begins_with("/")) {
 			return _get_root_string() + bd.substr(1, bd.length());
diff --git a/drivers/unix/file_access_unix.cpp b/drivers/unix/file_access_unix.cpp
index dc21d1d8e5..75d115df9c 100644
--- a/drivers/unix/file_access_unix.cpp
+++ b/drivers/unix/file_access_unix.cpp
@@ -160,7 +160,7 @@ void FileAccessUnix::close() {
 		close_notification_func(path, flags);
 	}
 
-	if (save_path != "") {
+	if (!save_path.is_empty()) {
 		int rename_error = rename((save_path + ".tmp").utf8().get_data(), save_path.utf8().get_data());
 
 		if (rename_error && close_fail_notify) {
diff --git a/drivers/unix/os_unix.cpp b/drivers/unix/os_unix.cpp
index 1ebc8cca5e..f0c679b54e 100644
--- a/drivers/unix/os_unix.cpp
+++ b/drivers/unix/os_unix.cpp
@@ -460,11 +460,11 @@ int OS_Unix::get_processor_count() const {
 
 String OS_Unix::get_user_data_dir() const {
 	String appname = get_safe_dir_name(ProjectSettings::get_singleton()->get("application/config/name"));
-	if (appname != "") {
+	if (!appname.is_empty()) {
 		bool use_custom_dir = ProjectSettings::get_singleton()->get("application/config/use_custom_user_dir");
 		if (use_custom_dir) {
 			String custom_dir = get_safe_dir_name(ProjectSettings::get_singleton()->get("application/config/custom_user_dir_name"), true);
-			if (custom_dir == "") {
+			if (custom_dir.is_empty()) {
 				custom_dir = appname;
 			}
 			return get_data_path().plus_file(custom_dir);
@@ -486,7 +486,7 @@ String OS_Unix::get_executable_path() const {
 	if (len > 0) {
 		b.parse_utf8(buf, len);
 	}
-	if (b == "") {
+	if (b.is_empty()) {
 		WARN_PRINT("Couldn't get executable path from /proc/self/exe, using argv[0]");
 		return OS::get_executable_path();
 	}
diff --git a/drivers/vulkan/rendering_device_vulkan.cpp b/drivers/vulkan/rendering_device_vulkan.cpp
index 952ee50074..8069904655 100644
--- a/drivers/vulkan/rendering_device_vulkan.cpp
+++ b/drivers/vulkan/rendering_device_vulkan.cpp
@@ -4249,7 +4249,7 @@ String RenderingDeviceVulkan::_shader_uniform_debug(RID p_shader, int p_set) {
 		}
 		for (int j = 0; j < shader->sets[i].uniform_info.size(); j++) {
 			const UniformInfo &ui = shader->sets[i].uniform_info[j];
-			if (ret != String()) {
+			if (!ret.is_empty()) {
 				ret += "\n";
 			}
 			ret += "Set: " + itos(i) + " Binding: " + itos(ui.binding) + " Type: " + shader_uniform_names[ui.type] + " Length: " + itos(ui.length);
diff --git a/drivers/windows/dir_access_windows.cpp b/drivers/windows/dir_access_windows.cpp
index 3e98e36d14..aa8d7977f7 100644
--- a/drivers/windows/dir_access_windows.cpp
+++ b/drivers/windows/dir_access_windows.cpp
@@ -133,7 +133,7 @@ Error DirAccessWindows::change_dir(String p_dir) {
 	bool worked = (SetCurrentDirectoryW((LPCWSTR)(p_dir.utf16().get_data())) != 0);
 
 	String base = _get_root_path();
-	if (base != "") {
+	if (!base.is_empty()) {
 		GetCurrentDirectoryW(2048, real_current_dir_name);
 		String new_dir = String::utf16((const char16_t *)real_current_dir_name).replace("\\", "/");
 		if (!new_dir.begins_with(base)) {
@@ -184,7 +184,7 @@ Error DirAccessWindows::make_dir(String p_dir) {
 
 String DirAccessWindows::get_current_dir(bool p_include_drive) {
 	String base = _get_root_path();
-	if (base != "") {
+	if (!base.is_empty()) {
 		String bd = current_dir.replace("\\", "/").replace_first(base, "");
 		if (bd.begins_with("/")) {
 			return _get_root_string() + bd.substr(1, bd.length());
@@ -196,7 +196,7 @@ String DirAccessWindows::get_current_dir(bool p_include_drive) {
 	if (p_include_drive) {
 		return current_dir;
 	} else {
-		if (_get_root_string() == "") {
+		if (_get_root_string().is_empty()) {
 			int p = current_dir.find(":");
 			if (p != -1) {
 				return current_dir.substr(p + 1);
diff --git a/drivers/windows/file_access_windows.cpp b/drivers/windows/file_access_windows.cpp
index ff81622408..2c7b5b9be9 100644
--- a/drivers/windows/file_access_windows.cpp
+++ b/drivers/windows/file_access_windows.cpp
@@ -99,7 +99,7 @@ Error FileAccessWindows::_open(const String &p_path, int p_mode_flags) {
 		HANDLE f = FindFirstFileW((LPCWSTR)(path.utf16().get_data()), &d);
 		if (f != INVALID_HANDLE_VALUE) {
 			String fname = String::utf16((const char16_t *)(d.cFileName));
-			if (fname != String()) {
+			if (!fname.is_empty()) {
 				String base_file = path.get_file();
 				if (base_file != fname && base_file.findn(fname) == 0) {
 					WARN_PRINT("Case mismatch opening requested file '" + base_file + "', stored as '" + fname + "' in the filesystem. This file will not open when exported to other case-sensitive platforms.");
@@ -142,7 +142,7 @@ void FileAccessWindows::close() {
 	fclose(f);
 	f = nullptr;
 
-	if (save_path != "") {
+	if (!save_path.is_empty()) {
 		bool rename_error = true;
 		int attempts = 4;
 		while (rename_error && attempts) {
diff --git a/editor/action_map_editor.cpp b/editor/action_map_editor.cpp
index 9df76b8657..a8d3bfcc90 100644
--- a/editor/action_map_editor.cpp
+++ b/editor/action_map_editor.cpp
@@ -761,7 +761,7 @@ void ActionMapEditor::_add_action_pressed() {
 }
 
 void ActionMapEditor::_add_action(const String &p_name) {
-	if (p_name == "" || !_is_action_name_valid(p_name)) {
+	if (p_name.is_empty() || !_is_action_name_valid(p_name)) {
 		show_message(TTR("Invalid action name. It cannot be empty nor contain '/', ':', '=', '\\' or '\"'"));
 		return;
 	}
@@ -785,7 +785,7 @@ void ActionMapEditor::_action_edited() {
 			return;
 		}
 
-		if (new_name == "" || !_is_action_name_valid(new_name)) {
+		if (new_name.is_empty() || !_is_action_name_valid(new_name)) {
 			ti->set_text(0, old_name);
 			show_message(TTR("Invalid action name. It cannot be empty nor contain '/', ':', '=', '\\' or '\"'"));
 			return;
diff --git a/editor/animation_track_editor.cpp b/editor/animation_track_editor.cpp
index c212523c98..e7251662b7 100644
--- a/editor/animation_track_editor.cpp
+++ b/editor/animation_track_editor.cpp
@@ -650,7 +650,7 @@ public:
 						List<StringName> anims;
 						ap->get_animation_list(&anims);
 						for (const StringName &E : anims) {
-							if (animations != String()) {
+							if (!animations.is_empty()) {
 								animations += ",";
 							}
 
@@ -659,7 +659,7 @@ public:
 					}
 				}
 
-				if (animations != String()) {
+				if (!animations.is_empty()) {
 					animations += ",";
 				}
 				animations += "[stop]";
@@ -1332,7 +1332,7 @@ public:
 							List<StringName> anims;
 							ap->get_animation_list(&anims);
 							for (List<StringName>::Element *G = anims.front(); G; G = G->next()) {
-								if (animations != String()) {
+								if (!animations.is_empty()) {
 									animations += ",";
 								}
 
@@ -1341,7 +1341,7 @@ public:
 						}
 					}
 
-					if (animations != String()) {
+					if (!animations.is_empty()) {
 						animations += ",";
 					}
 					animations += "[stop]";
@@ -2665,7 +2665,7 @@ String AnimationTrackEdit::get_tooltip(const Point2 &p_pos) const {
 					if (stream.is_valid()) {
 						if (stream->get_path().is_resource_file()) {
 							stream_name = stream->get_path().get_file();
-						} else if (stream->get_name() != "") {
+						} else if (!stream->get_name().is_empty()) {
 							stream_name = stream->get_name();
 						} else {
 							stream_name = stream->get_class();
@@ -3657,7 +3657,7 @@ void AnimationTrackEditor::insert_transform_key(Node3D *p_node, const String &p_
 
 	// Let's build a node path.
 	String path = root->get_path_to(p_node);
-	if (p_sub != "") {
+	if (!p_sub.is_empty()) {
 		path += ":" + p_sub;
 	}
 
@@ -3697,7 +3697,7 @@ bool AnimationTrackEditor::has_track(Node3D *p_node, const String &p_sub, const
 
 	// Let's build a node path.
 	String path = root->get_path_to(p_node);
-	if (p_sub != "") {
+	if (!p_sub.is_empty()) {
 		path += ":" + p_sub;
 	}
 
@@ -3762,7 +3762,7 @@ void AnimationTrackEditor::insert_node_value_key(Node *p_node, const String &p_p
 	EditorHistory *history = EditorNode::get_singleton()->get_editor_history();
 	for (int i = 1; i < history->get_path_size(); i++) {
 		String prop = history->get_path_property(i);
-		ERR_FAIL_COND(prop == "");
+		ERR_FAIL_COND(prop.is_empty());
 		path += ":" + prop;
 	}
 
@@ -3862,7 +3862,7 @@ void AnimationTrackEditor::insert_value_key(const String &p_property, const Vari
 
 	for (int i = 1; i < history->get_path_size(); i++) {
 		String prop = history->get_path_property(i);
-		ERR_FAIL_COND(prop == "");
+		ERR_FAIL_COND(prop.is_empty());
 		path += ":" + prop;
 	}
 
@@ -6021,7 +6021,7 @@ void AnimationTrackEditor::_pick_track_select_recursive(TreeItem *p_item, const
 	NodePath np = p_item->get_metadata(0);
 	Node *node = get_node(np);
 
-	if (p_filter != String() && ((String)node->get_name()).findn(p_filter) != -1) {
+	if (!p_filter.is_empty() && ((String)node->get_name()).findn(p_filter) != -1) {
 		p_select_candidates.push_back(node);
 	}
 
diff --git a/editor/code_editor.cpp b/editor/code_editor.cpp
index 371ea17c68..c024c909a3 100644
--- a/editor/code_editor.cpp
+++ b/editor/code_editor.cpp
@@ -1534,7 +1534,7 @@ void CodeTextEditor::set_edit_state(const Variant &p_state) {
 
 void CodeTextEditor::set_error(const String &p_error) {
 	error->set_text(p_error);
-	if (p_error != "") {
+	if (!p_error.is_empty()) {
 		error->set_default_cursor_shape(CURSOR_POINTING_HAND);
 	} else {
 		error->set_default_cursor_shape(CURSOR_ARROW);
@@ -1547,7 +1547,7 @@ void CodeTextEditor::set_error_pos(int p_line, int p_column) {
 }
 
 void CodeTextEditor::goto_error() {
-	if (error->get_text() != "") {
+	if (!error->get_text().is_empty()) {
 		text_editor->unfold_line(error_line);
 		text_editor->set_caret_line(error_line);
 		text_editor->set_caret_column(error_column);
diff --git a/editor/connections_dialog.cpp b/editor/connections_dialog.cpp
index 2088a7e1c4..4945414237 100644
--- a/editor/connections_dialog.cpp
+++ b/editor/connections_dialog.cpp
@@ -111,7 +111,7 @@ public:
 void ConnectDialog::ok_pressed() {
 	String method_name = dst_method->get_text();
 
-	if (method_name == "") {
+	if (method_name.is_empty()) {
 		error->set_text(TTR("Method in target node must be specified."));
 		error->popup_centered();
 		return;
@@ -234,7 +234,7 @@ void ConnectDialog::_add_bind() {
  */
 void ConnectDialog::_remove_bind() {
 	String st = bind_editor->get_selected_path();
-	if (st == "") {
+	if (st.is_empty()) {
 		return;
 	}
 	int idx = st.get_slice("/", 1).to_int() - 1;
@@ -969,7 +969,7 @@ void ConnectionsDock::update_tree() {
 					} else if (pi.type != Variant::NIL) {
 						tname = Variant::get_type_name(pi.type);
 					}
-					signaldesc += (pi.name == "" ? String("arg " + itos(i)) : pi.name) + ": " + tname;
+					signaldesc += (pi.name.is_empty() ? String("arg " + itos(i)) : pi.name) + ": " + tname;
 					argnames.push_back(pi.name + ":" + tname);
 				}
 			}
@@ -1001,7 +1001,7 @@ void ConnectionsDock::update_tree() {
 				if (!found) {
 					DocTools *dd = EditorHelp::get_doc_data();
 					Map<String, DocData::ClassDoc>::Element *F = dd->class_list.find(base);
-					while (F && descr == String()) {
+					while (F && descr.is_empty()) {
 						for (int i = 0; i < F->get().signals.size(); i++) {
 							if (F->get().signals[i].name == signal_name.operator String()) {
 								descr = DTR(F->get().signals[i].description);
diff --git a/editor/create_dialog.cpp b/editor/create_dialog.cpp
index 921c03e8ad..6bf14df8a1 100644
--- a/editor/create_dialog.cpp
+++ b/editor/create_dialog.cpp
@@ -173,7 +173,7 @@ void CreateDialog::_update_search() {
 	_configure_search_option_item(root, base_type, ClassDB::class_exists(base_type));
 
 	const String search_text = search_box->get_text();
-	bool empty_search = search_text == "";
+	bool empty_search = search_text.is_empty();
 
 	// Filter all candidate results.
 	Vector<String> candidates;
@@ -244,7 +244,7 @@ void CreateDialog::_configure_search_option_item(TreeItem *r_item, const String
 		r_item->set_icon(0, EditorNode::get_singleton()->get_class_icon(p_type, icon_fallback));
 	}
 
-	if (search_box->get_text() != "") {
+	if (!search_box->get_text().is_empty()) {
 		r_item->set_collapsed(false);
 	} else {
 		// Don't collapse the root node or an abstract node on the first tree level.
@@ -322,7 +322,7 @@ void CreateDialog::_cleanup() {
 
 void CreateDialog::_confirmed() {
 	String selected_item = get_selected_type();
-	if (selected_item == String()) {
+	if (selected_item.is_empty()) {
 		return;
 	}
 
@@ -642,7 +642,7 @@ void CreateDialog::_load_favorites_and_history() {
 		while (!f->eof_reached()) {
 			String l = f->get_line().strip_edges();
 
-			if (l != String()) {
+			if (!l.is_empty()) {
 				favorite_list.push_back(l);
 			}
 		}
diff --git a/editor/debugger/script_editor_debugger.cpp b/editor/debugger/script_editor_debugger.cpp
index 71e501056c..4f7dc78017 100644
--- a/editor/debugger/script_editor_debugger.cpp
+++ b/editor/debugger/script_editor_debugger.cpp
@@ -79,7 +79,7 @@ void ScriptEditorDebugger::_put_msg(String p_message, Array p_data) {
 
 void ScriptEditorDebugger::debug_copy() {
 	String msg = reason->get_text();
-	if (msg == "") {
+	if (msg.is_empty()) {
 		return;
 	}
 	DisplayServer::get_singleton()->clipboard_set(msg);
@@ -312,7 +312,7 @@ void ScriptEditorDebugger::_parse_message(const String &p_msg, const Array &p_da
 		if (is_move_to_foreground()) {
 			DisplayServer::get_singleton()->window_move_to_foreground();
 		}
-		if (error != "") {
+		if (!error.is_empty()) {
 			tabs->set_current_tab(0);
 		}
 		profiler->set_enabled(false);
@@ -1083,7 +1083,7 @@ void ScriptEditorDebugger::_method_changed(Object *p_base, const StringName &p_n
 
 	Resource *res = Object::cast_to<Resource>(p_base);
 
-	if (res && res->get_path() != String()) {
+	if (res && !res->get_path().is_empty()) {
 		String respath = res->get_path();
 		int pathid = _get_res_path_cache(respath);
 
@@ -1113,7 +1113,7 @@ void ScriptEditorDebugger::_property_changed(Object *p_base, const StringName &p
 
 		if (p_value.is_ref()) {
 			Ref<Resource> res = p_value;
-			if (res.is_valid() && res->get_path() != String()) {
+			if (res.is_valid() && !res->get_path().is_empty()) {
 				Array msg;
 				msg.push_back(pathid);
 				msg.push_back(p_property);
@@ -1133,13 +1133,13 @@ void ScriptEditorDebugger::_property_changed(Object *p_base, const StringName &p
 
 	Resource *res = Object::cast_to<Resource>(p_base);
 
-	if (res && res->get_path() != String()) {
+	if (res && !res->get_path().is_empty()) {
 		String respath = res->get_path();
 		int pathid = _get_res_path_cache(respath);
 
 		if (p_value.is_ref()) {
 			Ref<Resource> res2 = p_value;
-			if (res2.is_valid() && res2->get_path() != String()) {
+			if (res2.is_valid() && !res2->get_path().is_empty()) {
 				Array msg;
 				msg.push_back(pathid);
 				msg.push_back(p_property);
diff --git a/editor/dependency_editor.cpp b/editor/dependency_editor.cpp
index 7ab5d9a97c..1cc8cc01ce 100644
--- a/editor/dependency_editor.cpp
+++ b/editor/dependency_editor.cpp
@@ -75,7 +75,7 @@ void DependencyEditor::_fix_and_find(EditorFileSystemDirectory *efsd, Map<String
 		String path = efsd->get_file_path(i);
 
 		for (KeyValue<String, String> &E : candidates[file]) {
-			if (E.value == String()) {
+			if (E.value.is_empty()) {
 				E.value = path;
 				continue;
 			}
@@ -135,7 +135,7 @@ void DependencyEditor::_fix_all() {
 
 	for (KeyValue<String, Map<String, String>> &E : candidates) {
 		for (const KeyValue<String, String> &F : E.value) {
-			if (F.value != String()) {
+			if (!F.value.is_empty()) {
 				remaps[F.key] = F.value;
 			}
 		}
diff --git a/editor/doc_tools.cpp b/editor/doc_tools.cpp
index f1d427648a..8191b343f7 100644
--- a/editor/doc_tools.cpp
+++ b/editor/doc_tools.cpp
@@ -252,17 +252,17 @@ void DocTools::remove_from(const DocTools &p_data) {
 }
 
 void DocTools::add_doc(const DocData::ClassDoc &p_class_doc) {
-	ERR_FAIL_COND(p_class_doc.name == "");
+	ERR_FAIL_COND(p_class_doc.name.is_empty());
 	class_list[p_class_doc.name] = p_class_doc;
 }
 
 void DocTools::remove_doc(const String &p_class_name) {
-	ERR_FAIL_COND(p_class_name == "" || !class_list.has(p_class_name));
+	ERR_FAIL_COND(p_class_name.is_empty() || !class_list.has(p_class_name));
 	class_list.erase(p_class_name);
 }
 
 bool DocTools::has_doc(const String &p_class_name) {
-	if (p_class_name == "") {
+	if (p_class_name.is_empty()) {
 		return false;
 	}
 	return class_list.has(p_class_name);
@@ -437,7 +437,7 @@ void DocTools::generate(bool p_basic_types) {
 		method_list.sort();
 
 		for (const MethodInfo &E : method_list) {
-			if (E.name == "" || (E.name[0] == '_' && !(E.flags & METHOD_FLAG_VIRTUAL))) {
+			if (E.name.is_empty() || (E.name[0] == '_' && !(E.flags & METHOD_FLAG_VIRTUAL))) {
 				continue; //hidden, don't count
 			}
 
@@ -459,21 +459,21 @@ void DocTools::generate(bool p_basic_types) {
 			}
 
 			if (E.flags & METHOD_FLAG_CONST) {
-				if (method.qualifiers != "") {
+				if (!method.qualifiers.is_empty()) {
 					method.qualifiers += " ";
 				}
 				method.qualifiers += "const";
 			}
 
 			if (E.flags & METHOD_FLAG_VARARG) {
-				if (method.qualifiers != "") {
+				if (!method.qualifiers.is_empty()) {
 					method.qualifiers += " ";
 				}
 				method.qualifiers += "vararg";
 			}
 
 			if (E.flags & METHOD_FLAG_STATIC) {
-				if (method.qualifiers != "") {
+				if (!method.qualifiers.is_empty()) {
 					method.qualifiers += " ";
 				}
 				method.qualifiers += "static";
@@ -736,21 +736,21 @@ void DocTools::generate(bool p_basic_types) {
 			DocData::return_doc_from_retinfo(method, mi.return_val);
 
 			if (mi.flags & METHOD_FLAG_VARARG) {
-				if (method.qualifiers != "") {
+				if (!method.qualifiers.is_empty()) {
 					method.qualifiers += " ";
 				}
 				method.qualifiers += "vararg";
 			}
 
 			if (mi.flags & METHOD_FLAG_CONST) {
-				if (method.qualifiers != "") {
+				if (!method.qualifiers.is_empty()) {
 					method.qualifiers += " ";
 				}
 				method.qualifiers += "const";
 			}
 
 			if (mi.flags & METHOD_FLAG_STATIC) {
-				if (method.qualifiers != "") {
+				if (!method.qualifiers.is_empty()) {
 					method.qualifiers += " ";
 				}
 				method.qualifiers += "static";
@@ -885,7 +885,7 @@ void DocTools::generate(bool p_basic_types) {
 				md.name = mi.name;
 
 				if (mi.flags & METHOD_FLAG_VARARG) {
-					if (md.qualifiers != "") {
+					if (!md.qualifiers.is_empty()) {
 						md.qualifiers += " ";
 					}
 					md.qualifiers += "vararg";
@@ -1005,7 +1005,7 @@ Error DocTools::load_classes(const String &p_dir) {
 	da->list_dir_begin();
 	String path;
 	path = da->get_next();
-	while (path != String()) {
+	while (!path.is_empty()) {
 		if (!da->current_is_dir() && path.ends_with("xml")) {
 			Ref<XMLParser> parser = memnew(XMLParser);
 			Error err2 = parser->open(p_dir.plus_file(path));
@@ -1035,7 +1035,7 @@ Error DocTools::erase_classes(const String &p_dir) {
 	da->list_dir_begin();
 	String path;
 	path = da->get_next();
-	while (path != String()) {
+	while (!path.is_empty()) {
 		if (!da->current_is_dir() && path.ends_with("xml")) {
 			to_erase.push_back(path);
 		}
@@ -1236,7 +1236,7 @@ Error DocTools::_load(Ref<XMLParser> parser) {
 }
 
 static void _write_string(FileAccess *f, int p_tablevel, const String &p_string) {
-	if (p_string == "") {
+	if (p_string.is_empty()) {
 		return;
 	}
 	String tab;
@@ -1254,15 +1254,15 @@ static void _write_method_doc(FileAccess *f, const String &p_name, Vector<DocDat
 			const DocData::MethodDoc &m = p_method_docs[i];
 
 			String qualifiers;
-			if (m.qualifiers != "") {
+			if (!m.qualifiers.is_empty()) {
 				qualifiers += " qualifiers=\"" + m.qualifiers.xml_escape() + "\"";
 			}
 
 			_write_string(f, 2, "<" + p_name + " name=\"" + m.name.xml_escape() + "\"" + qualifiers + ">");
 
-			if (m.return_type != "") {
+			if (!m.return_type.is_empty()) {
 				String enum_text;
-				if (m.return_enum != String()) {
+				if (!m.return_enum.is_empty()) {
 					enum_text = " enum=\"" + m.return_enum + "\"";
 				}
 				_write_string(f, 3, "<return type=\"" + m.return_type + "\"" + enum_text + " />");
@@ -1277,11 +1277,11 @@ static void _write_method_doc(FileAccess *f, const String &p_name, Vector<DocDat
 				const DocData::ArgumentDoc &a = m.arguments[j];
 
 				String enum_text;
-				if (a.enumeration != String()) {
+				if (!a.enumeration.is_empty()) {
 					enum_text = " enum=\"" + a.enumeration + "\"";
 				}
 
-				if (a.default_value != "") {
+				if (!a.default_value.is_empty()) {
 					_write_string(f, 3, "<argument index=\"" + itos(j) + "\" name=\"" + a.name.xml_escape() + "\" type=\"" + a.type.xml_escape() + "\"" + enum_text + " default=\"" + a.default_value.xml_escape(true) + "\" />");
 				} else {
 					_write_string(f, 3, "<argument index=\"" + itos(j) + "\" name=\"" + a.name.xml_escape() + "\" type=\"" + a.type.xml_escape() + "\"" + enum_text + " />");
@@ -1319,7 +1319,7 @@ Error DocTools::save_classes(const String &p_default_path, const Map<String, Str
 		_write_string(f, 0, "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>");
 
 		String header = "<class name=\"" + c.name + "\"";
-		if (c.inherits != "") {
+		if (!c.inherits.is_empty()) {
 			header += " inherits=\"" + c.inherits + "\"";
 		}
 		header += String(" version=\"") + VERSION_BRANCH + "\"";
@@ -1353,10 +1353,10 @@ Error DocTools::save_classes(const String &p_default_path, const Map<String, Str
 
 			for (int i = 0; i < c.properties.size(); i++) {
 				String additional_attributes;
-				if (c.properties[i].enumeration != String()) {
+				if (!c.properties[i].enumeration.is_empty()) {
 					additional_attributes += " enum=\"" + c.properties[i].enumeration + "\"";
 				}
-				if (c.properties[i].default_value != String()) {
+				if (!c.properties[i].default_value.is_empty()) {
 					additional_attributes += " default=\"" + c.properties[i].default_value.xml_escape(true) + "\"";
 				}
 
@@ -1380,13 +1380,13 @@ Error DocTools::save_classes(const String &p_default_path, const Map<String, Str
 			for (int i = 0; i < c.constants.size(); i++) {
 				const DocData::ConstantDoc &k = c.constants[i];
 				if (k.is_value_valid) {
-					if (k.enumeration != String()) {
+					if (!k.enumeration.is_empty()) {
 						_write_string(f, 2, "<constant name=\"" + k.name + "\" value=\"" + k.value + "\" enum=\"" + k.enumeration + "\">");
 					} else {
 						_write_string(f, 2, "<constant name=\"" + k.name + "\" value=\"" + k.value + "\">");
 					}
 				} else {
-					if (k.enumeration != String()) {
+					if (!k.enumeration.is_empty()) {
 						_write_string(f, 2, "<constant name=\"" + k.name + "\" value=\"platform-dependent\" enum=\"" + k.enumeration + "\">");
 					} else {
 						_write_string(f, 2, "<constant name=\"" + k.name + "\" value=\"platform-dependent\">");
@@ -1406,7 +1406,7 @@ Error DocTools::save_classes(const String &p_default_path, const Map<String, Str
 			for (int i = 0; i < c.theme_properties.size(); i++) {
 				const DocData::ThemeItemDoc &ti = c.theme_properties[i];
 
-				if (ti.default_value != "") {
+				if (!ti.default_value.is_empty()) {
 					_write_string(f, 2, "<theme_item name=\"" + ti.name + "\" data_type=\"" + ti.data_type + "\" type=\"" + ti.type + "\" default=\"" + ti.default_value.xml_escape(true) + "\">");
 				} else {
 					_write_string(f, 2, "<theme_item name=\"" + ti.name + "\" data_type=\"" + ti.data_type + "\" type=\"" + ti.type + "\">");
diff --git a/editor/editor_asset_installer.cpp b/editor/editor_asset_installer.cpp
index 8dd3045887..6c64c53837 100644
--- a/editor/editor_asset_installer.cpp
+++ b/editor/editor_asset_installer.cpp
@@ -88,7 +88,7 @@ void EditorAssetInstaller::_item_edited() {
 	String path = item->get_metadata(0);
 
 	updating = true;
-	if (path == String() || item == tree->get_root()) { //a dir or root
+	if (path.is_empty() || item == tree->get_root()) { //a dir or root
 		_update_subitems(item, item->is_checked(0), true);
 	}
 
@@ -212,7 +212,7 @@ void EditorAssetInstaller::open(const String &p_path, int p_depth) {
 			depth--;
 		}
 
-		if (skip || path == String()) {
+		if (skip || path.is_empty()) {
 			continue;
 		}
 
@@ -307,7 +307,7 @@ void EditorAssetInstaller::ok_pressed() {
 
 		if (status_map.has(name) && status_map[name]->is_checked(0)) {
 			String path = status_map[name]->get_metadata(0);
-			if (path == String()) { // a dir
+			if (path.is_empty()) { // a dir
 
 				String dirpath;
 				TreeItem *t = status_map[name];
diff --git a/editor/editor_autoload_settings.cpp b/editor/editor_autoload_settings.cpp
index 86da3f89a6..418d7d58ef 100644
--- a/editor/editor_autoload_settings.cpp
+++ b/editor/editor_autoload_settings.cpp
@@ -340,22 +340,22 @@ void EditorAutoloadSettings::_autoload_file_callback(const String &p_path) {
 }
 
 void EditorAutoloadSettings::_autoload_text_submitted(const String p_name) {
-	if (autoload_add_path->get_text() != "" && _autoload_name_is_valid(p_name, nullptr)) {
+	if (!autoload_add_path->get_text().is_empty() && _autoload_name_is_valid(p_name, nullptr)) {
 		_autoload_add();
 	}
 }
 
 void EditorAutoloadSettings::_autoload_path_text_changed(const String p_path) {
 	add_autoload->set_disabled(
-			p_path == "" || !_autoload_name_is_valid(autoload_add_name->get_text(), nullptr));
+			p_path.is_empty() || !_autoload_name_is_valid(autoload_add_name->get_text(), nullptr));
 }
 
 void EditorAutoloadSettings::_autoload_text_changed(const String p_name) {
 	String error_string;
 	bool is_name_valid = _autoload_name_is_valid(p_name, &error_string);
-	add_autoload->set_disabled(autoload_add_path->get_text() == "" || !is_name_valid);
+	add_autoload->set_disabled(autoload_add_path->get_text().is_empty() || !is_name_valid);
 	error_message->set_text(error_string);
-	error_message->set_visible(autoload_add_name->get_text() != "" && !is_name_valid);
+	error_message->set_visible(!autoload_add_name->get_text().is_empty() && !is_name_valid);
 }
 
 Node *EditorAutoloadSettings::_create_autoload(const String &p_path) {
diff --git a/editor/editor_command_palette.cpp b/editor/editor_command_palette.cpp
index 1b1a7a4a09..6bc23c352a 100644
--- a/editor/editor_command_palette.cpp
+++ b/editor/editor_command_palette.cpp
@@ -164,7 +164,7 @@ void EditorCommandPalette::_sbox_input(const Ref<InputEvent> &p_ie) {
 void EditorCommandPalette::_confirmed() {
 	TreeItem *selected_option = search_options->get_selected();
 	String command_key = selected_option != nullptr ? selected_option->get_metadata(0) : "";
-	if (command_key != "") {
+	if (!command_key.is_empty()) {
 		hide();
 		execute_command(command_key);
 	}
diff --git a/editor/editor_data.cpp b/editor/editor_data.cpp
index 6fd8cb47ea..390a2998d6 100644
--- a/editor/editor_data.cpp
+++ b/editor/editor_data.cpp
@@ -100,7 +100,7 @@ void EditorHistory::_add_object(ObjectID p_object, const String &p_property, int
 		history.resize(current + 1); //clip history to next
 	}
 
-	if (p_property != "" && has_prev) {
+	if (!p_property.is_empty() && has_prev) {
 		//add a sub property
 		History &pr = history.write[current];
 		h = pr;
@@ -566,7 +566,7 @@ void EditorData::remove_scene(int p_idx) {
 		current_edited_scene--;
 	}
 
-	if (edited_scene[p_idx].path != String()) {
+	if (!edited_scene[p_idx].path.is_empty()) {
 		ScriptEditor::get_singleton()->close_builtin_scripts_from_scene(edited_scene[p_idx].path);
 	}
 
@@ -583,7 +583,7 @@ bool EditorData::_find_updated_instances(Node *p_root, Node *p_node, Set<String>
 
 	if (p_node == p_root) {
 		ss = p_node->get_scene_inherited_state();
-	} else if (p_node->get_scene_file_path() != String()) {
+	} else if (!p_node->get_scene_file_path().is_empty()) {
 		ss = p_node->get_scene_instance_state();
 	}
 
@@ -647,7 +647,7 @@ bool EditorData::check_and_update_scene(int p_idx) {
 
 		memdelete(edited_scene[p_idx].root);
 		edited_scene.write[p_idx].root = new_scene;
-		if (new_scene->get_scene_file_path() != "") {
+		if (!new_scene->get_scene_file_path().is_empty()) {
 			edited_scene.write[p_idx].path = new_scene->get_scene_file_path();
 		}
 		edited_scene.write[p_idx].selection = new_selection;
@@ -682,14 +682,14 @@ void EditorData::set_edited_scene_root(Node *p_root) {
 	ERR_FAIL_INDEX(current_edited_scene, edited_scene.size());
 	edited_scene.write[current_edited_scene].root = p_root;
 	if (p_root) {
-		if (p_root->get_scene_file_path() != "") {
+		if (!p_root->get_scene_file_path().is_empty()) {
 			edited_scene.write[current_edited_scene].path = p_root->get_scene_file_path();
 		} else {
 			p_root->set_scene_file_path(edited_scene[current_edited_scene].path);
 		}
 	}
 
-	if (edited_scene[current_edited_scene].path != "") {
+	if (!edited_scene[current_edited_scene].path.is_empty()) {
 		edited_scene.write[current_edited_scene].file_modified_time = FileAccess::get_modified_time(edited_scene[current_edited_scene].path);
 	}
 }
@@ -764,7 +764,7 @@ Ref<Script> EditorData::get_scene_root_script(int p_idx) const {
 	Ref<Script> s = edited_scene[p_idx].root->get_script();
 	if (!s.is_valid() && edited_scene[p_idx].root->get_child_count()) {
 		Node *n = edited_scene[p_idx].root->get_child(0);
-		while (!s.is_valid() && n && n->get_scene_file_path() == String()) {
+		while (!s.is_valid() && n && n->get_scene_file_path().is_empty()) {
 			s = n->get_script();
 			n = n->get_parent();
 		}
@@ -777,7 +777,7 @@ String EditorData::get_scene_title(int p_idx, bool p_always_strip_extension) con
 	if (!edited_scene[p_idx].root) {
 		return TTR("[empty]");
 	}
-	if (edited_scene[p_idx].root->get_scene_file_path() == "") {
+	if (edited_scene[p_idx].root->get_scene_file_path().is_empty()) {
 		return TTR("[unsaved]");
 	}
 
@@ -818,7 +818,7 @@ String EditorData::get_scene_path(int p_idx) const {
 	ERR_FAIL_INDEX_V(p_idx, edited_scene.size(), String());
 
 	if (edited_scene[p_idx].root) {
-		if (edited_scene[p_idx].root->get_scene_file_path() == "") {
+		if (edited_scene[p_idx].root->get_scene_file_path().is_empty()) {
 			edited_scene[p_idx].root->set_scene_file_path(edited_scene[p_idx].path);
 		} else {
 			return edited_scene[p_idx].root->get_scene_file_path();
diff --git a/editor/editor_dir_dialog.cpp b/editor/editor_dir_dialog.cpp
index f91dedf25d..61b655098f 100644
--- a/editor/editor_dir_dialog.cpp
+++ b/editor/editor_dir_dialog.cpp
@@ -49,7 +49,7 @@ void EditorDirDialog::_update_dir(TreeItem *p_item, EditorFileSystemDirectory *p
 	if (!p_item->get_parent()) {
 		p_item->set_text(0, "res://");
 	} else {
-		if (!opened_paths.has(path) && (p_select_path == String() || !p_select_path.begins_with(path))) {
+		if (!opened_paths.has(path) && (p_select_path.is_empty() || !p_select_path.begins_with(path))) {
 			p_item->set_collapsed(true);
 		}
 
diff --git a/editor/editor_export.cpp b/editor/editor_export.cpp
index 55a2c319fe..95affb09b6 100644
--- a/editor/editor_export.cpp
+++ b/editor/editor_export.cpp
@@ -264,7 +264,7 @@ void EditorExportPlatform::gen_debug_flags(Vector<String> &r_flags, int p_flags)
 		String passwd = EditorSettings::get_singleton()->get("filesystem/file_server/password");
 		r_flags.push_back("--remote-fs");
 		r_flags.push_back(host + ":" + itos(port));
-		if (passwd != "") {
+		if (!passwd.is_empty()) {
 			r_flags.push_back("--remote-fs-password");
 			r_flags.push_back(passwd);
 		}
@@ -528,7 +528,7 @@ void EditorExportPlatform::_edit_files_with_filter(DirAccess *da, const Vector<S
 }
 
 void EditorExportPlatform::_edit_filter_list(Set<String> &r_list, const String &p_filter, bool exclude) {
-	if (p_filter == "") {
+	if (p_filter.is_empty()) {
 		return;
 	}
 	Vector<String> split = p_filter.split(",");
@@ -683,12 +683,12 @@ EditorExportPlatform::FeatureContainers EditorExportPlatform::get_feature_contai
 		result.features_pv.push_back(E);
 	}
 
-	if (p_preset->get_custom_features() != String()) {
+	if (!p_preset->get_custom_features().is_empty()) {
 		Vector<String> tmp_custom_list = p_preset->get_custom_features().split(",");
 
 		for (int i = 0; i < tmp_custom_list.size(); i++) {
 			String f = tmp_custom_list[i].strip_edges();
-			if (f != String()) {
+			if (!f.is_empty()) {
 				result.features.insert(f);
 				result.features_pv.push_back(f);
 			}
@@ -994,12 +994,12 @@ Error EditorExportPlatform::export_project_files(const Ref<EditorExportPreset> &
 
 	Vector<String> custom_list;
 
-	if (p_preset->get_custom_features() != String()) {
+	if (!p_preset->get_custom_features().is_empty()) {
 		Vector<String> tmp_custom_list = p_preset->get_custom_features().split(",");
 
 		for (int i = 0; i < tmp_custom_list.size(); i++) {
 			String f = tmp_custom_list[i].strip_edges();
-			if (f != String()) {
+			if (!f.is_empty()) {
 				custom_list.push_back(f);
 			}
 		}
@@ -1033,14 +1033,14 @@ Error EditorExportPlatform::export_project_files(const Ref<EditorExportPreset> &
 	// Store icon and splash images directly, they need to bypass the import system and be loaded as images
 	String icon = ProjectSettings::get_singleton()->get("application/config/icon");
 	String splash = ProjectSettings::get_singleton()->get("application/boot_splash/image");
-	if (icon != String() && FileAccess::exists(icon)) {
+	if (!icon.is_empty() && FileAccess::exists(icon)) {
 		Vector<uint8_t> array = FileAccess::get_file_as_array(icon);
 		err = p_func(p_udata, icon, array, idx, total, enc_in_filters, enc_ex_filters, key);
 		if (err != OK) {
 			return err;
 		}
 	}
-	if (splash != String() && FileAccess::exists(splash) && icon != splash) {
+	if (!splash.is_empty() && FileAccess::exists(splash) && icon != splash) {
 		Vector<uint8_t> array = FileAccess::get_file_as_array(splash);
 		err = p_func(p_udata, splash, array, idx, total, enc_in_filters, enc_ex_filters, key);
 		if (err != OK) {
@@ -1359,7 +1359,7 @@ void EditorExportPlatform::gen_export_flags(Vector<String> &r_flags, int p_flags
 		String passwd = EditorSettings::get_singleton()->get("filesystem/file_server/password");
 		r_flags.push_back("--remote-fs");
 		r_flags.push_back(host + ":" + itos(port));
-		if (passwd != "") {
+		if (!passwd.is_empty()) {
 			r_flags.push_back("--remote-fs-password");
 			r_flags.push_back(passwd);
 		}
@@ -1855,7 +1855,7 @@ Error EditorExportPlatformPC::export_project(const Ref<EditorExportPreset> &p_pr
 
 	template_path = template_path.strip_edges();
 
-	if (template_path == String()) {
+	if (template_path.is_empty()) {
 		if (p_preset->get("binary_format/64_bits")) {
 			if (p_debug) {
 				template_path = find_export_template(debug_file_64);
@@ -1871,7 +1871,7 @@ Error EditorExportPlatformPC::export_project(const Ref<EditorExportPreset> &p_pr
 		}
 	}
 
-	if (template_path != String() && !FileAccess::exists(template_path)) {
+	if (!template_path.is_empty() && !FileAccess::exists(template_path)) {
 		EditorNode::get_singleton()->show_warning(TTR("Template file not found:") + "\n" + template_path);
 		return ERR_FILE_NOT_FOUND;
 	}
diff --git a/editor/editor_feature_profile.cpp b/editor/editor_feature_profile.cpp
index 78175ff022..2ca91043e1 100644
--- a/editor/editor_feature_profile.cpp
+++ b/editor/editor_feature_profile.cpp
@@ -310,7 +310,7 @@ EditorFeatureProfile::EditorFeatureProfile() {}
 void EditorFeatureProfileManager::_notification(int p_what) {
 	if (p_what == NOTIFICATION_READY) {
 		current_profile = EDITOR_GET("_default_feature_profile");
-		if (current_profile != String()) {
+		if (!current_profile.is_empty()) {
 			current.instantiate();
 			Error err = current->load_from_file(EditorSettings::get_singleton()->get_feature_profiles_dir().plus_file(current_profile + ".profile"));
 			if (err != OK) {
@@ -334,7 +334,7 @@ String EditorFeatureProfileManager::_get_selected_profile() {
 
 void EditorFeatureProfileManager::_update_profile_list(const String &p_select_profile) {
 	String selected_profile;
-	if (p_select_profile == String()) { //default, keep
+	if (p_select_profile.is_empty()) { //default, keep
 		if (profile_list->get_selected() >= 0) {
 			selected_profile = profile_list->get_item_metadata(profile_list->get_selected());
 			if (!FileAccess::exists(EditorSettings::get_singleton()->get_feature_profiles_dir().plus_file(selected_profile + ".profile"))) {
@@ -352,7 +352,7 @@ void EditorFeatureProfileManager::_update_profile_list(const String &p_select_pr
 	d->list_dir_begin();
 	while (true) {
 		String f = d->get_next();
-		if (f == String()) {
+		if (f.is_empty()) {
 			break;
 		}
 
@@ -371,7 +371,7 @@ void EditorFeatureProfileManager::_update_profile_list(const String &p_select_pr
 	for (int i = 0; i < profiles.size(); i++) {
 		String name = profiles[i];
 
-		if (i == 0 && selected_profile == String()) {
+		if (i == 0 && selected_profile.is_empty()) {
 			selected_profile = name;
 		}
 
@@ -386,15 +386,15 @@ void EditorFeatureProfileManager::_update_profile_list(const String &p_select_pr
 		}
 	}
 
-	class_list_vbc->set_visible(selected_profile != String());
-	property_list_vbc->set_visible(selected_profile != String());
-	no_profile_selected_help->set_visible(selected_profile == String());
-	profile_actions[PROFILE_CLEAR]->set_disabled(current_profile == String());
-	profile_actions[PROFILE_ERASE]->set_disabled(selected_profile == String());
-	profile_actions[PROFILE_EXPORT]->set_disabled(selected_profile == String());
-	profile_actions[PROFILE_SET]->set_disabled(selected_profile == String());
+	class_list_vbc->set_visible(!selected_profile.is_empty());
+	property_list_vbc->set_visible(!selected_profile.is_empty());
+	no_profile_selected_help->set_visible(selected_profile.is_empty());
+	profile_actions[PROFILE_CLEAR]->set_disabled(current_profile.is_empty());
+	profile_actions[PROFILE_ERASE]->set_disabled(selected_profile.is_empty());
+	profile_actions[PROFILE_EXPORT]->set_disabled(selected_profile.is_empty());
+	profile_actions[PROFILE_SET]->set_disabled(selected_profile.is_empty());
 
-	current_profile_name->set_text(current_profile != String() ? current_profile : TTR("(none)"));
+	current_profile_name->set_text(!current_profile.is_empty() ? current_profile : TTR("(none)"));
 
 	_update_selected_profile();
 }
@@ -412,7 +412,7 @@ void EditorFeatureProfileManager::_profile_action(int p_action) {
 		} break;
 		case PROFILE_SET: {
 			String selected = _get_selected_profile();
-			ERR_FAIL_COND(selected == String());
+			ERR_FAIL_COND(selected.is_empty());
 			if (selected == current_profile) {
 				return; // Nothing to do here.
 			}
@@ -438,7 +438,7 @@ void EditorFeatureProfileManager::_profile_action(int p_action) {
 		} break;
 		case PROFILE_ERASE: {
 			String selected = _get_selected_profile();
-			ERR_FAIL_COND(selected == String());
+			ERR_FAIL_COND(selected.is_empty());
 
 			erase_profile_dialog->set_text(vformat(TTR("Remove currently selected profile, '%s'? Cannot be undone."), selected));
 			erase_profile_dialog->popup_centered(Size2(240, 60) * EDSCALE);
@@ -448,7 +448,7 @@ void EditorFeatureProfileManager::_profile_action(int p_action) {
 
 void EditorFeatureProfileManager::_erase_selected_profile() {
 	String selected = _get_selected_profile();
-	ERR_FAIL_COND(selected == String());
+	ERR_FAIL_COND(selected.is_empty());
 	DirAccessRef da = DirAccess::open(EditorSettings::get_singleton()->get_feature_profiles_dir());
 	ERR_FAIL_COND_MSG(!da, "Cannot open directory '" + EditorSettings::get_singleton()->get_feature_profiles_dir() + "'.");
 
@@ -718,7 +718,7 @@ void EditorFeatureProfileManager::_update_selected_profile() {
 	class_list->clear();
 
 	String profile = _get_selected_profile();
-	if (profile == String()) { //nothing selected, nothing edited
+	if (profile.is_empty()) { //nothing selected, nothing edited
 		property_list->clear();
 		edited.unref();
 		return;
@@ -822,7 +822,7 @@ void EditorFeatureProfileManager::_export_profile(const String &p_path) {
 
 void EditorFeatureProfileManager::_save_and_update() {
 	String edited_path = _get_selected_profile();
-	ERR_FAIL_COND(edited_path == String());
+	ERR_FAIL_COND(edited_path.is_empty());
 	ERR_FAIL_COND(edited.is_null());
 
 	edited->save_to_file(EditorSettings::get_singleton()->get_feature_profiles_dir().plus_file(edited_path + ".profile"));
diff --git a/editor/editor_file_dialog.cpp b/editor/editor_file_dialog.cpp
index b5300bdc1b..a35458d284 100644
--- a/editor/editor_file_dialog.cpp
+++ b/editor/editor_file_dialog.cpp
@@ -274,7 +274,7 @@ void EditorFileDialog::_post_popup() {
 		file_box->set_visible(true);
 	}
 
-	if (is_visible() && get_current_file() != "") {
+	if (is_visible() && !get_current_file().is_empty()) {
 		_request_single_thumbnail(get_current_dir().plus_file(get_current_file()));
 	}
 
diff --git a/editor/editor_file_system.cpp b/editor/editor_file_system.cpp
index 4f02a82fb5..d515b58e37 100644
--- a/editor/editor_file_system.cpp
+++ b/editor/editor_file_system.cpp
@@ -241,7 +241,7 @@ void EditorFileSystem::_scan_filesystem() {
 				first = false;
 				continue;
 			}
-			if (l == String()) {
+			if (l.is_empty()) {
 				continue;
 			}
 
@@ -295,7 +295,7 @@ void EditorFileSystem::_scan_filesystem() {
 		{
 			FileAccessRef f2 = FileAccess::open(update_cache, FileAccess::READ);
 			String l = f2->get_line().strip_edges();
-			while (l != String()) {
+			while (!l.is_empty()) {
 				file_cache.erase(l); //erase cache for this, so it gets updated
 				l = f2->get_line().strip_edges();
 			}
@@ -405,7 +405,7 @@ bool EditorFileSystem::_test_for_reimport(const String &p_path, bool p_only_impo
 			return false; //parse error, try reimport manually (Avoid reimport loop on broken file)
 		}
 
-		if (assign != String()) {
+		if (!assign.is_empty()) {
 			if (assign.begins_with("path")) {
 				to_check.push_back(value);
 			} else if (assign == "files") {
@@ -476,7 +476,7 @@ bool EditorFileSystem::_test_for_reimport(const String &p_path, bool p_only_impo
 			memdelete(md5s);
 			return false; // parse error
 		}
-		if (assign != String()) {
+		if (!assign.is_empty()) {
 			if (!p_only_imported_files) {
 				if (assign == "source_md5") {
 					source_md5 = value;
@@ -497,11 +497,11 @@ bool EditorFileSystem::_test_for_reimport(const String &p_path, bool p_only_impo
 
 	//check source md5 matching
 	if (!p_only_imported_files) {
-		if (source_file != String() && source_file != p_path) {
+		if (!source_file.is_empty() && source_file != p_path) {
 			return true; //file was moved, reimport
 		}
 
-		if (source_md5 == String()) {
+		if (source_md5.is_empty()) {
 			return true; //lacks md5, so just reimport
 		}
 
@@ -510,7 +510,7 @@ bool EditorFileSystem::_test_for_reimport(const String &p_path, bool p_only_impo
 			return true;
 		}
 
-		if (dest_files.size() && dest_md5 != String()) {
+		if (dest_files.size() && !dest_md5.is_empty()) {
 			md5 = FileAccess::get_multiple_md5(dest_files);
 			if (md5 != dest_md5) {
 				return true;
@@ -710,7 +710,7 @@ void EditorFileSystem::_scan_new_dir(EditorFileSystemDirectory *p_dir, DirAccess
 	da->list_dir_begin();
 	while (true) {
 		String f = da->get_next();
-		if (f == "") {
+		if (f.is_empty()) {
 			break;
 		}
 
@@ -820,7 +820,7 @@ void EditorFileSystem::_scan_new_dir(EditorFileSystemDirectory *p_dir, DirAccess
 					scan_actions.push_back(ia);
 				}
 
-				if (fc->type == String()) {
+				if (fc->type.is_empty()) {
 					fi->type = ResourceLoader::get_resource_type(path);
 					fi->import_group_file = ResourceLoader::get_import_group_file(path);
 					//there is also the chance that file type changed due to reimport, must probably check this somehow here (or kind of note it for next time in another file?)
@@ -932,7 +932,7 @@ void EditorFileSystem::_scan_fs_changes(EditorFileSystemDirectory *p_dir, const
 		da->list_dir_begin();
 		while (true) {
 			String f = da->get_next();
-			if (f == "") {
+			if (f.is_empty()) {
 				break;
 			}
 
@@ -1246,7 +1246,7 @@ void EditorFileSystem::_save_filesystem_cache(EditorFileSystemDirectory *p_dir,
 	p_file->store_line("::" + p_dir->get_path() + "::" + String::num(p_dir->modified_time));
 
 	for (int i = 0; i < p_dir->files.size(); i++) {
-		if (p_dir->files[i]->import_group_file != String()) {
+		if (!p_dir->files[i]->import_group_file.is_empty()) {
 			group_file_cache.insert(p_dir->files[i]->import_group_file);
 		}
 		String s = p_dir->files[i]->file + "::" + p_dir->files[i]->type + "::" + itos(p_dir->files[i]->uid) + "::" + itos(p_dir->files[i]->modified_time) + "::" + itos(p_dir->files[i]->import_modified_time) + "::" + itos(p_dir->files[i]->import_valid) + "::" + p_dir->files[i]->import_group_file + "::" + p_dir->files[i]->script_class_name + "<>" + p_dir->files[i]->script_class_extends + "<>" + p_dir->files[i]->script_class_icon_path;
@@ -1386,7 +1386,7 @@ EditorFileSystemDirectory *EditorFileSystem::get_filesystem_path(const String &p
 
 	f = f.substr(6, f.length());
 	f = f.replace("\\", "/");
-	if (f == String()) {
+	if (f.is_empty()) {
 		return filesystem;
 	}
 
@@ -1465,7 +1465,7 @@ void EditorFileSystem::_scan_script_classes(EditorFileSystemDirectory *p_dir) {
 	int filecount = p_dir->files.size();
 	const EditorFileSystemDirectory::FileInfo *const *files = p_dir->files.ptr();
 	for (int i = 0; i < filecount; i++) {
-		if (files[i]->script_class_name == String()) {
+		if (files[i]->script_class_name.is_empty()) {
 			continue;
 		}
 
@@ -1545,7 +1545,7 @@ void EditorFileSystem::update_file(const String &p_file) {
 	}
 
 	String type = ResourceLoader::get_resource_type(p_file);
-	if (type == "" && textfile_extensions.has(p_file.get_extension())) {
+	if (type.is_empty() && textfile_extensions.has(p_file.get_extension())) {
 		type = "TextFile";
 	}
 	ResourceUID::ID uid = ResourceLoader::get_resource_uid(p_file);
@@ -1616,9 +1616,9 @@ Error EditorFileSystem::_reimport_group(const String &p_group_file, const Vector
 		ERR_CONTINUE(err != OK);
 		ERR_CONTINUE(!config->has_section_key("remap", "importer"));
 		String file_importer_name = config->get_value("remap", "importer");
-		ERR_CONTINUE(file_importer_name == String());
+		ERR_CONTINUE(file_importer_name.is_empty());
 
-		if (importer_name != String() && importer_name != file_importer_name) {
+		if (!importer_name.is_empty() && importer_name != file_importer_name) {
 			EditorNode::get_singleton()->show_warning(vformat(TTR("There are multiple importers for different types pointing to file %s, import aborted"), p_group_file));
 			ERR_FAIL_V(ERR_FILE_CORRUPT);
 		}
@@ -1656,7 +1656,7 @@ Error EditorFileSystem::_reimport_group(const String &p_group_file, const Vector
 		return OK; // (do nothing)
 	}
 
-	ERR_FAIL_COND_V(importer_name == String(), ERR_UNCONFIGURED);
+	ERR_FAIL_COND_V(importer_name.is_empty(), ERR_UNCONFIGURED);
 
 	Ref<ResourceImporter> importer = ResourceFormatImporter::get_singleton()->get_importer_by_name(importer_name);
 
@@ -1677,7 +1677,7 @@ Error EditorFileSystem::_reimport_group(const String &p_group_file, const Vector
 		if (version > 0) {
 			f->store_line("importer_version=" + itos(version));
 		}
-		if (importer->get_resource_type() != "") {
+		if (!importer->get_resource_type().is_empty()) {
 			f->store_line("type=\"" + importer->get_resource_type() + "\"");
 		}
 
@@ -1759,7 +1759,7 @@ Error EditorFileSystem::_reimport_group(const String &p_group_file, const Vector
 		if (ResourceCache::has(file)) {
 			Resource *r = ResourceCache::get(file);
 
-			if (r->get_import_path() != String()) {
+			if (!r->get_import_path().is_empty()) {
 				String dst_path = ResourceFormatImporter::get_singleton()->get_internal_resource_path(file);
 				r->set_import_path(dst_path);
 				r->set_import_last_modified_time(0);
@@ -1783,7 +1783,7 @@ void EditorFileSystem::_reimport_file(const String &p_file, const Map<StringName
 	Map<StringName, Variant> params;
 	String importer_name; //empty by default though
 
-	if (p_custom_importer != String()) {
+	if (!p_custom_importer.is_empty()) {
 		importer_name = p_custom_importer;
 	}
 	if (p_custom_options != nullptr) {
@@ -1808,7 +1808,7 @@ void EditorFileSystem::_reimport_file(const String &p_file, const Map<StringName
 				}
 
 				if (cf->has_section("remap")) {
-					if (p_custom_importer == String()) {
+					if (p_custom_importer.is_empty()) {
 						importer_name = cf->get_value("remap", "importer");
 					}
 
@@ -1834,7 +1834,7 @@ void EditorFileSystem::_reimport_file(const String &p_file, const Map<StringName
 	Ref<ResourceImporter> importer;
 	bool load_default = false;
 	//find the importer
-	if (importer_name != "") {
+	if (!importer_name.is_empty()) {
 		importer = ResourceFormatImporter::get_singleton()->get_importer_by_name(importer_name);
 	}
 
@@ -1894,7 +1894,7 @@ void EditorFileSystem::_reimport_file(const String &p_file, const Map<StringName
 	if (version > 0) {
 		f->store_line("importer_version=" + itos(version));
 	}
-	if (importer->get_resource_type() != "") {
+	if (!importer->get_resource_type().is_empty()) {
 		f->store_line("type=\"" + importer->get_resource_type() + "\"");
 	}
 
@@ -1907,7 +1907,7 @@ void EditorFileSystem::_reimport_file(const String &p_file, const Map<StringName
 	Vector<String> dest_paths;
 
 	if (err == OK) {
-		if (importer->get_save_extension() == "") {
+		if (importer->get_save_extension().is_empty()) {
 			//no path
 		} else if (import_variants.size()) {
 			//import with variants
@@ -2003,7 +2003,7 @@ void EditorFileSystem::_reimport_file(const String &p_file, const Map<StringName
 	if (ResourceCache::has(p_file)) {
 		Resource *r = ResourceCache::get(p_file);
 
-		if (r->get_import_path() != String()) {
+		if (!r->get_import_path().is_empty()) {
 			String dst_path = ResourceFormatImporter::get_singleton()->get_internal_resource_path(p_file);
 			r->set_import_path(dst_path);
 			r->set_import_last_modified_time(0);
@@ -2062,7 +2062,7 @@ void EditorFileSystem::reimport_files(const Vector<String> &p_files) {
 			groups_to_reimport.insert(file);
 			//groups do not belong to grups
 			group_file = String();
-		} else if (group_file != String()) {
+		} else if (!group_file.is_empty()) {
 			//it's a group file, add group to import and skip this file
 			groups_to_reimport.insert(group_file);
 		} else {
diff --git a/editor/editor_folding.cpp b/editor/editor_folding.cpp
index c98606730c..b8341ee406 100644
--- a/editor/editor_folding.cpp
+++ b/editor/editor_folding.cpp
@@ -113,7 +113,7 @@ void EditorFolding::_fill_folds(const Node *p_root, const Node *p_node, Array &p
 		if (E.usage & PROPERTY_USAGE_EDITOR) {
 			if (E.type == Variant::OBJECT) {
 				RES res = p_node->get(E.name);
-				if (res.is_valid() && !resources.has(res) && res->get_path() != String() && !res->get_path().is_resource_file()) {
+				if (res.is_valid() && !resources.has(res) && !res->get_path().is_empty() && !res->get_path().is_resource_file()) {
 					Vector<String> res_unfolds = _get_unfolds(res.ptr());
 					resource_folds.push_back(res->get_path());
 					resource_folds.push_back(res_unfolds);
@@ -243,8 +243,8 @@ void EditorFolding::_do_object_unfolds(Object *p_object, Set<RES> &resources) {
 
 		//can unfold
 		if (E.usage & PROPERTY_USAGE_EDITOR) {
-			if (group != "") { //group
-				if (group_base == String() || E.name.begins_with(group_base)) {
+			if (!group.is_empty()) { //group
+				if (group_base.is_empty() || E.name.begins_with(group_base)) {
 					bool can_revert = EditorPropertyRevert::can_property_revert(p_object, E.name);
 					if (can_revert) {
 						unfold_group.insert(group);
@@ -262,7 +262,7 @@ void EditorFolding::_do_object_unfolds(Object *p_object, Set<RES> &resources) {
 
 			if (E.type == Variant::OBJECT) {
 				RES res = p_object->get(E.name);
-				if (res.is_valid() && !resources.has(res) && res->get_path() != String() && !res->get_path().is_resource_file()) {
+				if (res.is_valid() && !resources.has(res) && !res->get_path().is_empty() && !res->get_path().is_resource_file()) {
 					resources.insert(res);
 					_do_object_unfolds(res.ptr(), resources);
 				}
diff --git a/editor/editor_fonts.cpp b/editor/editor_fonts.cpp
index a644e3e991..c65bfa6472 100644
--- a/editor/editor_fonts.cpp
+++ b/editor/editor_fonts.cpp
@@ -78,7 +78,7 @@
 	}                                                                 \
 	{                                                                 \
 		Dictionary variations;                                        \
-		if (m_variations != String()) {                               \
+		if (!m_variations.is_empty()) {                               \
 			Vector<String> variation_tags = m_variations.split(",");  \
 			for (int i = 0; i < variation_tags.size(); i++) {         \
 				Vector<String> tokens = variation_tags[i].split("="); \
@@ -104,7 +104,7 @@
 	}                                                                 \
 	{                                                                 \
 		Dictionary variations;                                        \
-		if (m_variations != String()) {                               \
+		if (!m_variations.is_empty()) {                               \
 			Vector<String> variation_tags = m_variations.split(",");  \
 			for (int i = 0; i < variation_tags.size(); i++) {         \
 				Vector<String> tokens = variation_tags[i].split("="); \
@@ -130,7 +130,7 @@
 	}                                                                 \
 	{                                                                 \
 		Dictionary variations;                                        \
-		if (m_variations != String()) {                               \
+		if (!m_variations.is_empty()) {                               \
 			Vector<String> variation_tags = m_variations.split(",");  \
 			for (int i = 0; i < variation_tags.size(); i++) {         \
 				Vector<String> tokens = variation_tags[i].split("="); \
diff --git a/editor/editor_help.cpp b/editor/editor_help.cpp
index 56718e4090..fc1e7ef389 100644
--- a/editor/editor_help.cpp
+++ b/editor/editor_help.cpp
@@ -250,7 +250,7 @@ void EditorHelp::_add_method(const DocData::MethodDoc &p_method, bool p_overview
 		class_desc->add_text(" ");
 	}
 
-	if (p_overview && p_method.description != "") {
+	if (p_overview && !p_method.description.is_empty()) {
 		class_desc->push_meta("@method " + p_method.name);
 	}
 
@@ -258,7 +258,7 @@ void EditorHelp::_add_method(const DocData::MethodDoc &p_method, bool p_overview
 	_add_text(p_method.name);
 	class_desc->pop();
 
-	if (p_overview && p_method.description != "") {
+	if (p_overview && !p_method.description.is_empty()) {
 		class_desc->pop(); //meta
 	}
 
@@ -275,7 +275,7 @@ void EditorHelp::_add_method(const DocData::MethodDoc &p_method, bool p_overview
 		_add_text(p_method.arguments[j].name);
 		class_desc->add_text(": ");
 		_add_type(p_method.arguments[j].type, p_method.arguments[j].enumeration);
-		if (p_method.arguments[j].default_value != "") {
+		if (!p_method.arguments[j].default_value.is_empty()) {
 			class_desc->push_color(symbol_color);
 			class_desc->add_text(" = ");
 			class_desc->pop();
@@ -301,7 +301,7 @@ void EditorHelp::_add_method(const DocData::MethodDoc &p_method, bool p_overview
 	class_desc->push_color(symbol_color);
 	class_desc->add_text(")");
 	class_desc->pop();
-	if (p_method.qualifiers != "") {
+	if (!p_method.qualifiers.is_empty()) {
 		class_desc->push_color(qualifier_color);
 		class_desc->add_text(" ");
 		_add_text(p_method.qualifiers);
@@ -375,7 +375,7 @@ void EditorHelp::_update_method_list(const Vector<DocData::MethodDoc> p_methods,
 			if (i < m.size() - 1 && new_prefix == m[i + 1].name.substr(0, 3) && new_prefix != group_prefix) {
 				is_new_group = i > 0;
 				group_prefix = new_prefix;
-			} else if (group_prefix != "" && new_prefix != group_prefix) {
+			} else if (!group_prefix.is_empty() && new_prefix != group_prefix) {
 				is_new_group = true;
 				group_prefix = "";
 			}
@@ -387,7 +387,7 @@ void EditorHelp::_update_method_list(const Vector<DocData::MethodDoc> p_methods,
 				class_desc->pop(); //cell
 			}
 
-			if (m[i].description != "" || m[i].errors_returned.size() > 0) {
+			if (!m[i].description.is_empty() || m[i].errors_returned.size() > 0) {
 				r_method_descrpitons = true;
 			}
 
@@ -521,19 +521,19 @@ void EditorHelp::_update_doc() {
 	// Inheritance tree
 
 	// Ascendents
-	if (cd.inherits != "") {
+	if (!cd.inherits.is_empty()) {
 		class_desc->push_color(title_color);
 		class_desc->push_font(doc_font);
 		class_desc->add_text(TTR("Inherits:") + " ");
 
 		String inherits = cd.inherits;
 
-		while (inherits != "") {
+		while (!inherits.is_empty()) {
 			_add_type(inherits);
 
 			inherits = doc->class_list[inherits].inherits;
 
-			if (inherits != "") {
+			if (!inherits.is_empty()) {
 				class_desc->add_text(" < ");
 			}
 		}
@@ -577,7 +577,7 @@ void EditorHelp::_update_doc() {
 	class_desc->add_newline();
 
 	// Brief description
-	if (cd.brief_description != "") {
+	if (!cd.brief_description.is_empty()) {
 		class_desc->push_color(text_color);
 		class_desc->push_font(doc_bold_font);
 		class_desc->push_indent(1);
@@ -591,7 +591,7 @@ void EditorHelp::_update_doc() {
 	}
 
 	// Class description
-	if (cd.description != "") {
+	if (!cd.description.is_empty()) {
 		section_line.push_back(Pair<String, int>(TTR("Description"), class_desc->get_line_count() - 2));
 		description_line = class_desc->get_line_count() - 2;
 		class_desc->push_color(title_color);
@@ -694,16 +694,16 @@ void EditorHelp::_update_doc() {
 
 			bool describe = false;
 
-			if (cd.properties[i].setter != "") {
+			if (!cd.properties[i].setter.is_empty()) {
 				skip_methods.insert(cd.properties[i].setter);
 				describe = true;
 			}
-			if (cd.properties[i].getter != "") {
+			if (!cd.properties[i].getter.is_empty()) {
 				skip_methods.insert(cd.properties[i].getter);
 				describe = true;
 			}
 
-			if (cd.properties[i].description != "") {
+			if (!cd.properties[i].description.is_empty()) {
 				describe = true;
 			}
 
@@ -735,7 +735,7 @@ void EditorHelp::_update_doc() {
 			class_desc->push_cell();
 			class_desc->push_font(doc_code_font);
 
-			if (cd.properties[i].default_value != "") {
+			if (!cd.properties[i].default_value.is_empty()) {
 				class_desc->push_color(symbol_color);
 				if (cd.properties[i].overridden) {
 					class_desc->add_text(" [");
@@ -764,18 +764,18 @@ void EditorHelp::_update_doc() {
 			class_desc->push_cell();
 			class_desc->push_font(doc_code_font);
 
-			if (cd.is_script_doc && (cd.properties[i].setter != "" || cd.properties[i].getter != "")) {
+			if (cd.is_script_doc && (!cd.properties[i].setter.is_empty() || !cd.properties[i].getter.is_empty())) {
 				class_desc->push_color(symbol_color);
 				class_desc->add_text(" [" + TTR("property:") + " ");
 				class_desc->pop(); // color
 
-				if (cd.properties[i].setter != "") {
+				if (!cd.properties[i].setter.is_empty()) {
 					class_desc->push_color(value_color);
 					class_desc->add_text("setter");
 					class_desc->pop(); // color
 				}
-				if (cd.properties[i].getter != "") {
-					if (cd.properties[i].setter != "") {
+				if (!cd.properties[i].getter.is_empty()) {
+					if (!cd.properties[i].setter.is_empty()) {
 						class_desc->push_color(symbol_color);
 						class_desc->add_text(", ");
 						class_desc->pop(); // color
@@ -914,7 +914,7 @@ void EditorHelp::_update_doc() {
 			class_desc->pop();
 
 			// Theme item default value.
-			if (cd.theme_properties[i].default_value != "") {
+			if (!cd.theme_properties[i].default_value.is_empty()) {
 				class_desc->push_color(symbol_color);
 				class_desc->add_text(" [" + TTR("default:") + " ");
 				class_desc->pop();
@@ -929,7 +929,7 @@ void EditorHelp::_update_doc() {
 			class_desc->pop(); // monofont
 
 			// Theme item description.
-			if (cd.theme_properties[i].description != "") {
+			if (!cd.theme_properties[i].description.is_empty()) {
 				class_desc->push_font(doc_font);
 				class_desc->push_color(comment_color);
 				class_desc->push_indent(1);
@@ -985,7 +985,7 @@ void EditorHelp::_update_doc() {
 				_add_text(cd.signals[i].arguments[j].name);
 				class_desc->add_text(": ");
 				_add_type(cd.signals[i].arguments[j].type);
-				if (cd.signals[i].arguments[j].default_value != "") {
+				if (!cd.signals[i].arguments[j].default_value.is_empty()) {
 					class_desc->push_color(symbol_color);
 					class_desc->add_text(" = ");
 					class_desc->pop();
@@ -999,7 +999,7 @@ void EditorHelp::_update_doc() {
 			class_desc->add_text(")");
 			class_desc->pop();
 			class_desc->pop(); // end monofont
-			if (cd.signals[i].description != "") {
+			if (!cd.signals[i].description.is_empty()) {
 				class_desc->push_font(doc_font);
 				class_desc->push_color(comment_color);
 				class_desc->push_indent(1);
@@ -1114,7 +1114,7 @@ void EditorHelp::_update_doc() {
 
 					class_desc->add_newline();
 
-					if (enum_list[i].description.strip_edges() != "") {
+					if (!enum_list[i].description.strip_edges().is_empty()) {
 						class_desc->push_font(doc_font);
 						class_desc->push_color(comment_color);
 						_add_text(DTR(enum_list[i].description));
@@ -1183,7 +1183,7 @@ void EditorHelp::_update_doc() {
 
 				class_desc->add_newline();
 
-				if (constants[i].description != "") {
+				if (!constants[i].description.is_empty()) {
 					class_desc->push_font(doc_font);
 					class_desc->push_color(comment_color);
 					_add_text(DTR(constants[i].description));
@@ -1239,7 +1239,7 @@ void EditorHelp::_update_doc() {
 			_add_text(cd.properties[i].name);
 			class_desc->pop(); // color
 
-			if (cd.properties[i].default_value != "") {
+			if (!cd.properties[i].default_value.is_empty()) {
 				class_desc->push_color(symbol_color);
 				class_desc->add_text(" [" + TTR("default:") + " ");
 				class_desc->pop(); // color
@@ -1253,18 +1253,18 @@ void EditorHelp::_update_doc() {
 				class_desc->pop(); // color
 			}
 
-			if (cd.is_script_doc && (cd.properties[i].setter != "" || cd.properties[i].getter != "")) {
+			if (cd.is_script_doc && (!cd.properties[i].setter.is_empty() || !cd.properties[i].getter.is_empty())) {
 				class_desc->push_color(symbol_color);
 				class_desc->add_text(" [" + TTR("property:") + " ");
 				class_desc->pop(); // color
 
-				if (cd.properties[i].setter != "") {
+				if (!cd.properties[i].setter.is_empty()) {
 					class_desc->push_color(value_color);
 					class_desc->add_text("setter");
 					class_desc->pop(); // color
 				}
-				if (cd.properties[i].getter != "") {
-					if (cd.properties[i].setter != "") {
+				if (!cd.properties[i].getter.is_empty()) {
+					if (!cd.properties[i].setter.is_empty()) {
 						class_desc->push_color(symbol_color);
 						class_desc->add_text(", ");
 						class_desc->pop(); // color
@@ -1289,7 +1289,7 @@ void EditorHelp::_update_doc() {
 					method_map[methods[j].name] = methods[j];
 				}
 
-				if (cd.properties[i].setter != "") {
+				if (!cd.properties[i].setter.is_empty()) {
 					class_desc->push_cell();
 					class_desc->pop(); // cell
 
@@ -1313,7 +1313,7 @@ void EditorHelp::_update_doc() {
 					method_line[cd.properties[i].setter] = property_line[cd.properties[i].name];
 				}
 
-				if (cd.properties[i].getter != "") {
+				if (!cd.properties[i].getter.is_empty()) {
 					class_desc->push_cell();
 					class_desc->pop(); // cell
 
diff --git a/editor/editor_help_search.cpp b/editor/editor_help_search.cpp
index 578e21861e..bf7280dfd0 100644
--- a/editor/editor_help_search.cpp
+++ b/editor/editor_help_search.cpp
@@ -161,7 +161,7 @@ void EditorHelpSearch::popup_dialog(const String &p_term) {
 		popup_centered_ratio(0.5F);
 	}
 
-	if (p_term == "") {
+	if (p_term.is_empty()) {
 		search_box->clear();
 	} else {
 		if (old_term == p_term) {
@@ -331,7 +331,7 @@ bool EditorHelpSearch::Runner::_phase_match_classes() {
 
 		// Match class name.
 		if (search_flags & SEARCH_CLASSES) {
-			match.name = term == "" || _match_string(term, class_doc.name);
+			match.name = term.is_empty() || _match_string(term, class_doc.name);
 		}
 
 		// Match members if the term is long enough.
@@ -513,7 +513,7 @@ TreeItem *EditorHelpSearch::Runner::_create_class_hierarchy(const ClassMatch &p_
 
 	// Ensure parent nodes are created first.
 	TreeItem *parent = root_item;
-	if (p_match.doc->inherits != "") {
+	if (!p_match.doc->inherits.is_empty()) {
 		if (class_items.has(p_match.doc->inherits)) {
 			parent = class_items[p_match.doc->inherits];
 		} else {
@@ -558,7 +558,7 @@ TreeItem *EditorHelpSearch::Runner::_create_method_item(TreeItem *p_parent, cons
 	for (int i = 0; i < p_doc->arguments.size(); i++) {
 		const DocData::ArgumentDoc &arg = p_doc->arguments[i];
 		tooltip += arg.type + " " + arg.name;
-		if (arg.default_value != "") {
+		if (!arg.default_value.is_empty()) {
 			tooltip += " = " + arg.default_value;
 		}
 		if (i < p_doc->arguments.size() - 1) {
@@ -574,7 +574,7 @@ TreeItem *EditorHelpSearch::Runner::_create_signal_item(TreeItem *p_parent, cons
 	for (int i = 0; i < p_doc->arguments.size(); i++) {
 		const DocData::ArgumentDoc &arg = p_doc->arguments[i];
 		tooltip += arg.type + " " + arg.name;
-		if (arg.default_value != "") {
+		if (!arg.default_value.is_empty()) {
 			tooltip += " = " + arg.default_value;
 		}
 		if (i < p_doc->arguments.size() - 1) {
diff --git a/editor/editor_inspector.cpp b/editor/editor_inspector.cpp
index 8187f982e1..14185ce2a4 100644
--- a/editor/editor_inspector.cpp
+++ b/editor/editor_inspector.cpp
@@ -2239,7 +2239,7 @@ void EditorInspector::_parse_added_editors(VBoxContainer *current_vbox, Ref<Edit
 					ep->property_usage = 0;
 				}
 
-				if (F.label != String()) {
+				if (!F.label.is_empty()) {
 					ep->set_label(F.label);
 				}
 
@@ -2438,7 +2438,7 @@ void EditorInspector::update_tree() {
 				}
 			}
 			if (category->icon.is_null()) {
-				if (type != String()) { // Can happen for built-in scripts.
+				if (!type.is_empty()) { // Can happen for built-in scripts.
 					category->icon = EditorNode::get_singleton()->get_class_icon(type, "Object");
 				}
 			}
@@ -2459,7 +2459,7 @@ void EditorInspector::update_tree() {
 					class_descr_cache[type2] = descr;
 				}
 
-				category->set_tooltip(p.name + "::" + (class_descr_cache[type2] == "" ? "" : class_descr_cache[type2]));
+				category->set_tooltip(p.name + "::" + (class_descr_cache[type2].is_empty() ? "" : class_descr_cache[type2]));
 			}
 
 			// Add editors at the start of a category.
@@ -2529,7 +2529,7 @@ void EditorInspector::update_tree() {
 			}
 		} else {
 			// Check if we exit or not a subgroup. If there is a prefix, remove it from the property label string.
-			if (subgroup != "" && subgroup_base != "") {
+			if (!subgroup.is_empty() && !subgroup_base.is_empty()) {
 				if (path.begins_with(subgroup_base)) {
 					path = path.trim_prefix(subgroup_base);
 				} else if (subgroup_base.begins_with(path)) {
@@ -2540,7 +2540,7 @@ void EditorInspector::update_tree() {
 			}
 
 			// Check if we exit or not a group. If there is a prefix, remove it from the property label string.
-			if (group != "" && group_base != "" && subgroup == "") {
+			if (!group.is_empty() && !group_base.is_empty() && subgroup.is_empty()) {
 				if (path.begins_with(group_base)) {
 					path = path.trim_prefix(group_base);
 				} else if (group_base.begins_with(path)) {
@@ -2552,10 +2552,10 @@ void EditorInspector::update_tree() {
 			}
 
 			// Add the group and subgroup to the path.
-			if (subgroup != "") {
+			if (!subgroup.is_empty()) {
 				path = subgroup + "/" + path;
 			}
-			if (group != "") {
+			if (!group.is_empty()) {
 				path = group + "/" + path;
 			}
 		}
@@ -2584,7 +2584,7 @@ void EditorInspector::update_tree() {
 		}
 
 		// Ignore properties that do not fit the filter.
-		if (use_filter && filter != "") {
+		if (use_filter && !filter.is_empty()) {
 			if (!filter.is_subsequence_ofi(path) && !filter.is_subsequence_ofi(property_label_string) && property_prefix.to_lower().find(filter.to_lower()) == -1) {
 				continue;
 			}
@@ -2707,7 +2707,7 @@ void EditorInspector::update_tree() {
 
 			// Get the class name.
 			StringName classname = object->get_class_name();
-			if (object_class != String()) {
+			if (!object_class.is_empty()) {
 				classname = object_class;
 			}
 
@@ -2729,7 +2729,7 @@ void EditorInspector::update_tree() {
 				// Build the property description String and add it to the cache.
 				DocTools *dd = EditorHelp::get_doc_data();
 				Map<String, DocData::ClassDoc>::Element *F = dd->class_list.find(classname);
-				while (F && descr == String()) {
+				while (F && descr.is_empty()) {
 					for (int i = 0; i < F->get().properties.size(); i++) {
 						if (F->get().properties[i].name == propname.operator String()) {
 							descr = DTR(F->get().properties[i].description);
@@ -2781,7 +2781,7 @@ void EditorInspector::update_tree() {
 							//and set label?
 						}
 
-						if (F.label != String()) {
+						if (!F.label.is_empty()) {
 							ep->set_label(F.label);
 						} else {
 							// Use the existing one.
@@ -2820,7 +2820,7 @@ void EditorInspector::update_tree() {
 					ep->connect("multiple_properties_changed", callable_mp(this, &EditorInspector::_multiple_properties_changed));
 					ep->connect("resource_selected", callable_mp(this, &EditorInspector::_resource_selected), varray(), CONNECT_DEFERRED);
 					ep->connect("object_id_selected", callable_mp(this, &EditorInspector::_object_id_selected), varray(), CONNECT_DEFERRED);
-					if (doc_hint != String()) {
+					if (!doc_hint.is_empty()) {
 						ep->set_tooltip(property_prefix + p.name + "::" + doc_hint);
 					} else {
 						ep->set_tooltip(property_prefix + p.name);
@@ -3050,7 +3050,7 @@ void EditorInspector::_edit_request_change(Object *p_object, const String &p_pro
 		return;
 	}
 
-	if (p_property == String()) {
+	if (p_property.is_empty()) {
 		update_tree_pending = true;
 	} else {
 		pending.insert(p_property);
diff --git a/editor/editor_layouts_dialog.cpp b/editor/editor_layouts_dialog.cpp
index 4cdeeb2396..7c8965d6f4 100644
--- a/editor/editor_layouts_dialog.cpp
+++ b/editor/editor_layouts_dialog.cpp
@@ -74,7 +74,7 @@ void EditorLayoutsDialog::ok_pressed() {
 		for (int i = 0; i < selected_items.size(); ++i) {
 			emit_signal(SNAME("name_confirmed"), layout_names->get_item_text(selected_items[i]));
 		}
-	} else if (name->is_visible() && name->get_text() != "") {
+	} else if (name->is_visible() && !name->get_text().is_empty()) {
 		emit_signal(SNAME("name_confirmed"), name->get_text());
 	}
 }
diff --git a/editor/editor_log.cpp b/editor/editor_log.cpp
index 5ace9ae03e..7bd98b0f0b 100644
--- a/editor/editor_log.cpp
+++ b/editor/editor_log.cpp
@@ -162,11 +162,11 @@ void EditorLog::_clear_request() {
 void EditorLog::_copy_request() {
 	String text = log->get_selected_text();
 
-	if (text == "") {
+	if (text.is_empty()) {
 		text = log->get_text();
 	}
 
-	if (text != "") {
+	if (!text.is_empty()) {
 		DisplayServer::get_singleton()->clipboard_set(text);
 	}
 }
@@ -237,7 +237,7 @@ void EditorLog::_add_log_line(LogMessage &p_message, bool p_replace_previous) {
 	// Only add the message to the log if it passes the filters.
 	bool filter_active = type_filter_map[p_message.type]->is_active();
 	String search_text = search_box->get_text();
-	bool search_match = search_text == String() || p_message.text.findn(search_text) > -1;
+	bool search_match = search_text.is_empty() || p_message.text.findn(search_text) > -1;
 
 	if (!filter_active || !search_match) {
 		return;
diff --git a/editor/editor_node.cpp b/editor/editor_node.cpp
index 3f20734e3f..00a776ba4d 100644
--- a/editor/editor_node.cpp
+++ b/editor/editor_node.cpp
@@ -858,7 +858,7 @@ void EditorNode::_resources_changed(const Vector<String> &p_resources) {
 			continue;
 		}
 
-		if (res->get_import_path() != String()) {
+		if (!res->get_import_path().is_empty()) {
 			// this is an imported resource, will be reloaded if reimported via the _resources_reimported() callback
 			continue;
 		}
@@ -886,7 +886,7 @@ void EditorNode::_fs_changed() {
 
 	// FIXME: Move this to a cleaner location, it's hacky to do this is _fs_changed.
 	String export_error;
-	if (export_defer.preset != "" && !EditorFileSystem::get_singleton()->is_scanning()) {
+	if (!export_defer.preset.is_empty() && !EditorFileSystem::get_singleton()->is_scanning()) {
 		String preset_name = export_defer.preset;
 		// Ensures export_project does not loop infinitely, because notifications may
 		// come during the export.
@@ -1006,7 +1006,7 @@ void EditorNode::_sources_changed(bool p_exist) {
 
 		_load_docks();
 
-		if (defer_load_scene != "") {
+		if (!defer_load_scene.is_empty()) {
 			load_scene(defer_load_scene);
 			defer_load_scene = "";
 		}
@@ -1242,7 +1242,7 @@ void EditorNode::save_resource_as(const Ref<Resource> &p_resource, const String
 		preferred.move_to_front(tres_element);
 	}
 
-	if (p_at_path != String()) {
+	if (!p_at_path.is_empty()) {
 		file->set_current_dir(p_at_path);
 		if (p_resource->get_path().is_resource_file()) {
 			file->set_current_file(p_resource->get_path().get_file());
@@ -1254,7 +1254,7 @@ void EditorNode::save_resource_as(const Ref<Resource> &p_resource, const String
 				file->set_current_file(String());
 			}
 		}
-	} else if (p_resource->get_path() != "") {
+	} else if (!p_resource->get_path().is_empty()) {
 		file->set_current_path(p_resource->get_path());
 		if (extensions.size()) {
 			String ext = p_resource->get_path().get_extension().to_lower();
@@ -1676,7 +1676,7 @@ void EditorNode::_save_scene(String p_file, int idx) {
 		return;
 	}
 
-	if (scene->get_scene_file_path() != String() && _validate_scene_recursive(scene->get_scene_file_path(), scene)) {
+	if (!scene->get_scene_file_path().is_empty() && _validate_scene_recursive(scene->get_scene_file_path(), scene)) {
 		show_accept(TTR("This scene can't be saved because there is a cyclic instancing inclusion.\nPlease resolve it and then attempt to save again."), TTR("OK"));
 		return;
 	}
@@ -1780,7 +1780,7 @@ void EditorNode::restart_editor() {
 	args.push_back("--path");
 	args.push_back(ProjectSettings::get_singleton()->get_resource_path());
 	args.push_back("-e");
-	if (to_reopen != String()) {
+	if (!to_reopen.is_empty()) {
 		args.push_back(to_reopen);
 	}
 
@@ -1792,13 +1792,13 @@ void EditorNode::_save_all_scenes() {
 	for (int i = 0; i < editor_data.get_edited_scene_count(); i++) {
 		Node *scene = editor_data.get_edited_scene_root(i);
 		if (scene) {
-			if (scene->get_scene_file_path() != "" && DirAccess::exists(scene->get_scene_file_path().get_base_dir())) {
+			if (!scene->get_scene_file_path().is_empty() && DirAccess::exists(scene->get_scene_file_path().get_base_dir())) {
 				if (i != editor_data.get_edited_scene()) {
 					_save_scene(scene->get_scene_file_path(), i);
 				} else {
 					_save_scene_with_preview(scene->get_scene_file_path());
 				}
-			} else if (scene->get_scene_file_path() != "") {
+			} else if (!scene->get_scene_file_path().is_empty()) {
 				all_saved = false;
 			}
 		}
@@ -1818,7 +1818,7 @@ void EditorNode::_mark_unsaved_scenes() {
 		}
 
 		String path = node->get_scene_file_path();
-		if (!(path == String() || FileAccess::exists(path))) {
+		if (!(path.is_empty() || FileAccess::exists(path))) {
 			if (i == editor_data.get_edited_scene()) {
 				set_current_version(-1);
 			} else {
@@ -2080,7 +2080,7 @@ void EditorNode::push_item(Object *p_object, const String &p_property, bool p_in
 	if (id != editor_history.get_current()) {
 		if (p_inspector_only) {
 			editor_history.add_object_inspector_only(id);
-		} else if (p_property == "") {
+		} else if (p_property.is_empty()) {
 			editor_history.add_object(id);
 		} else {
 			editor_history.add_object(id, p_property);
@@ -2193,7 +2193,7 @@ void EditorNode::_edit_current() {
 			inspector_dock->update(nullptr);
 		}
 
-		if (get_edited_scene() && get_edited_scene()->get_scene_file_path() != String()) {
+		if (get_edited_scene() && !get_edited_scene()->get_scene_file_path().is_empty()) {
 			String source_scene = get_edited_scene()->get_scene_file_path();
 			if (FileAccess::exists(source_scene + ".import")) {
 				editable_warning = TTR("This scene was imported, so changes to it won't be kept.\nInstancing it or inheriting will allow making changes to it.\nPlease read the documentation relevant to importing scenes to better understand this workflow.");
@@ -2316,7 +2316,7 @@ void EditorNode::_run(bool p_current, const String &p_custom) {
 
 	String run_filename;
 
-	if (p_current || (editor_data.get_edited_scene_root() && p_custom != String() && p_custom == editor_data.get_edited_scene_root()->get_scene_file_path())) {
+	if (p_current || (editor_data.get_edited_scene_root() && !p_custom.is_empty() && p_custom == editor_data.get_edited_scene_root()->get_scene_file_path())) {
 		Node *scene = editor_data.get_edited_scene_root();
 
 		if (!scene) {
@@ -2324,7 +2324,7 @@ void EditorNode::_run(bool p_current, const String &p_custom) {
 			return;
 		}
 
-		if (scene->get_scene_file_path() == "") {
+		if (scene->get_scene_file_path().is_empty()) {
 			current_option = -1;
 			_menu_option(FILE_SAVE_AS_SCENE);
 			// Set the option to save and run so when the dialog is accepted, the scene runs.
@@ -2334,11 +2334,11 @@ void EditorNode::_run(bool p_current, const String &p_custom) {
 		}
 
 		run_filename = scene->get_scene_file_path();
-	} else if (p_custom != "") {
+	} else if (!p_custom.is_empty()) {
 		run_filename = p_custom;
 	}
 
-	if (run_filename == "") {
+	if (run_filename.is_empty()) {
 		// evidently, run the scene
 		if (!ensure_main_scene(false)) {
 			return;
@@ -2349,7 +2349,7 @@ void EditorNode::_run(bool p_current, const String &p_custom) {
 		if (unsaved_cache) {
 			Node *scene = editor_data.get_edited_scene_root();
 
-			if (scene && scene->get_scene_file_path() != "") { // Only autosave if there is a scene and if it has a path.
+			if (scene && !scene->get_scene_file_path().is_empty()) { // Only autosave if there is a scene and if it has a path.
 				_save_scene_with_preview(scene->get_scene_file_path());
 			}
 		}
@@ -2381,7 +2381,7 @@ void EditorNode::_run(bool p_current, const String &p_custom) {
 	if (p_current) {
 		play_scene_button->set_pressed(true);
 		play_scene_button->set_icon(gui_base->get_theme_icon(SNAME("Reload"), SNAME("EditorIcons")));
-	} else if (p_custom != "") {
+	} else if (!p_custom.is_empty()) {
 		run_custom_filename = p_custom;
 		play_custom_scene_button->set_pressed(true);
 		play_custom_scene_button->set_icon(gui_base->get_theme_icon(SNAME("Reload"), SNAME("EditorIcons")));
@@ -2501,7 +2501,7 @@ void EditorNode::_menu_option_confirm(int p_option, bool p_confirmed) {
 					if (scene_root) {
 						String scene_filename = scene_root->get_scene_file_path();
 						save_confirmation->get_ok_button()->set_text(TTR("Save & Close"));
-						save_confirmation->set_text(vformat(TTR("Save changes to '%s' before closing?"), scene_filename != "" ? scene_filename : "unsaved scene"));
+						save_confirmation->set_text(vformat(TTR("Save changes to '%s' before closing?"), !scene_filename.is_empty() ? scene_filename : "unsaved scene"));
 						save_confirmation->popup_centered();
 						break;
 					}
@@ -2519,7 +2519,7 @@ void EditorNode::_menu_option_confirm(int p_option, bool p_confirmed) {
 		case FILE_SAVE_SCENE: {
 			int scene_idx = (p_option == FILE_SAVE_SCENE) ? -1 : tab_closing;
 			Node *scene = editor_data.get_edited_scene_root(scene_idx);
-			if (scene && scene->get_scene_file_path() != "") {
+			if (scene && !scene->get_scene_file_path().is_empty()) {
 				if (DirAccess::exists(scene->get_scene_file_path().get_base_dir())) {
 					if (scene_idx != editor_data.get_edited_scene()) {
 						_save_scene_with_preview(scene->get_scene_file_path(), scene_idx);
@@ -2575,7 +2575,7 @@ void EditorNode::_menu_option_confirm(int p_option, bool p_confirmed) {
 				file->add_filter("*." + extensions[i] + " ; " + extensions[i].to_upper());
 			}
 
-			if (scene->get_scene_file_path() != "") {
+			if (!scene->get_scene_file_path().is_empty()) {
 				String path = scene->get_scene_file_path();
 				file->set_current_path(path);
 				if (extensions.size()) {
@@ -2649,7 +2649,7 @@ void EditorNode::_menu_option_confirm(int p_option, bool p_confirmed) {
 
 				if (!editor_data.get_undo_redo().undo()) {
 					log->add_message(TTR("Nothing to undo."), EditorLog::MSG_TYPE_EDITOR);
-				} else if (action != "") {
+				} else if (!action.is_empty()) {
 					log->add_message(vformat(TTR("Undo: %s"), action), EditorLog::MSG_TYPE_EDITOR);
 				}
 			}
@@ -2676,7 +2676,7 @@ void EditorNode::_menu_option_confirm(int p_option, bool p_confirmed) {
 
 			String filename = scene->get_scene_file_path();
 
-			if (filename == String()) {
+			if (filename.is_empty()) {
 				show_warning(TTR("Can't reload a scene that was never saved."));
 				break;
 			}
@@ -2746,7 +2746,7 @@ void EditorNode::_menu_option_confirm(int p_option, bool p_confirmed) {
 
 		case FILE_SHOW_IN_FILESYSTEM: {
 			String path = editor_data.get_scene_path(editor_data.get_edited_scene());
-			if (path != String()) {
+			if (!path.is_empty()) {
 				filesystem_dock->navigate_to_path(path);
 			}
 		} break;
@@ -3011,7 +3011,7 @@ void EditorNode::_discard_changes(const String &p_str) {
 			Node *scene = editor_data.get_edited_scene_root(tab_closing);
 			if (scene != nullptr) {
 				String scene_filename = scene->get_scene_file_path();
-				if (scene_filename != "") {
+				if (!scene_filename.is_empty()) {
 					previous_scenes.push_back(scene_filename);
 				}
 			}
@@ -3138,7 +3138,7 @@ void EditorNode::_editor_select(int p_which) {
 }
 
 void EditorNode::select_editor_by_name(const String &p_name) {
-	ERR_FAIL_COND(p_name == "");
+	ERR_FAIL_COND(p_name.is_empty());
 
 	for (int i = 0; i < main_editor_buttons.size(); i++) {
 		if (main_editor_buttons[i]->get_text() == p_name) {
@@ -4491,13 +4491,13 @@ void EditorNode::_save_docks_to_config(Ref<ConfigFile> p_layout, const String &p
 		String names;
 		for (int j = 0; j < dock_slot[i]->get_tab_count(); j++) {
 			String name = dock_slot[i]->get_tab_control(j)->get_name();
-			if (names != "") {
+			if (!names.is_empty()) {
 				names += ",";
 			}
 			names += name;
 		}
 
-		if (names != "") {
+		if (!names.is_empty()) {
 			p_layout->set_value(p_section, "dock_" + itos(i + 1), names);
 		}
 	}
@@ -4522,7 +4522,7 @@ void EditorNode::_save_open_scenes_to_config(Ref<ConfigFile> p_layout, const Str
 	Array scenes;
 	for (int i = 0; i < editor_data.get_edited_scene_count(); i++) {
 		String path = editor_data.get_scene_path(i);
-		if (path == "") {
+		if (path.is_empty()) {
 			continue;
 		}
 		scenes.push_back(path);
@@ -4789,7 +4789,7 @@ bool EditorNode::ensure_main_scene(bool p_from_native) {
 	pick_main_scene->set_meta("from_native", p_from_native); // whether from play button or native run
 	String main_scene = GLOBAL_DEF("application/run/main_scene", "");
 
-	if (main_scene == "") {
+	if (main_scene.is_empty()) {
 		current_option = -1;
 		pick_main_scene->set_text(TTR("No main scene has ever been defined, select one?\nYou can change it later in \"Project Settings\" under the 'application' category."));
 		pick_main_scene->popup_centered();
@@ -4852,7 +4852,7 @@ bool EditorNode::is_run_playing() const {
 
 String EditorNode::get_run_playing_scene() const {
 	String run_filename = editor_run.get_running_scene();
-	if (run_filename == "" && is_run_playing()) {
+	if (run_filename.is_empty() && is_run_playing()) {
 		run_filename = GLOBAL_DEF("application/run/main_scene", ""); // Must be the main scene then.
 	}
 
@@ -4978,7 +4978,7 @@ void EditorNode::_scene_tab_closed(int p_tab, int option) {
 			: editor_data.get_scene_version(p_tab) != 0;
 	if (unsaved) {
 		save_confirmation->get_ok_button()->set_text(TTR("Save & Close"));
-		save_confirmation->set_text(vformat(TTR("Save changes to '%s' before closing?"), scene->get_scene_file_path() != "" ? scene->get_scene_file_path() : "unsaved scene"));
+		save_confirmation->set_text(vformat(TTR("Save changes to '%s' before closing?"), !scene->get_scene_file_path().is_empty() ? scene->get_scene_file_path() : "unsaved scene"));
 		save_confirmation->popup_centered();
 	} else {
 		_discard_changes();
@@ -4998,7 +4998,7 @@ void EditorNode::_scene_tab_hovered(int p_tab) {
 		tab_preview_panel->hide();
 	} else {
 		String path = editor_data.get_scene_path(p_tab);
-		if (path != String()) {
+		if (!path.is_empty()) {
 			EditorResourcePreview::get_singleton()->queue_resource_preview(path, this, "_thumbnail_done", p_tab);
 		}
 	}
@@ -5307,7 +5307,7 @@ Variant EditorNode::drag_resource(const Ref<Resource> &p_res, Control *p_from) {
 	drag_control->add_child(drag_preview);
 	if (p_res->get_path().is_resource_file()) {
 		label->set_text(p_res->get_path().get_file());
-	} else if (p_res->get_name() != "") {
+	} else if (!p_res->get_name().is_empty()) {
 		label->set_text(p_res->get_name());
 	} else {
 		label->set_text(p_res->get_class());
@@ -5446,7 +5446,7 @@ void EditorNode::_add_dropped_files_recursive(const Vector<String> &p_files, Str
 			sub_dir->list_dir_begin();
 
 			String next_file = sub_dir->get_next();
-			while (next_file != "") {
+			while (!next_file.is_empty()) {
 				if (next_file == "." || next_file == "..") {
 					next_file = sub_dir->get_next();
 					continue;
diff --git a/editor/editor_path.cpp b/editor/editor_path.cpp
index 45c0232072..b6797825b0 100644
--- a/editor/editor_path.cpp
+++ b/editor/editor_path.cpp
@@ -130,14 +130,14 @@ void EditorPath::update_path() {
 					name = r->get_name();
 				}
 
-				if (name == "") {
+				if (name.is_empty()) {
 					name = r->get_class();
 				}
 			} else if (obj->is_class("EditorDebuggerRemoteObject")) {
 				name = obj->call("get_title");
 			} else if (Object::cast_to<Node>(obj)) {
 				name = Object::cast_to<Node>(obj)->get_name();
-			} else if (Object::cast_to<Resource>(obj) && Object::cast_to<Resource>(obj)->get_name() != "") {
+			} else if (Object::cast_to<Resource>(obj) && !Object::cast_to<Resource>(obj)->get_name().is_empty()) {
 				name = Object::cast_to<Resource>(obj)->get_name();
 			} else {
 				name = obj->get_class();
diff --git a/editor/editor_paths.cpp b/editor/editor_paths.cpp
index 5b48cc2638..e747cdc29e 100644
--- a/editor/editor_paths.cpp
+++ b/editor/editor_paths.cpp
@@ -131,7 +131,7 @@ EditorPaths::EditorPaths() {
 		}
 	}
 
-	paths_valid = (data_path != "" && config_path != "" && cache_path != "");
+	paths_valid = (!data_path.is_empty() && !config_path.is_empty() && !cache_path.is_empty());
 	ERR_FAIL_COND_MSG(!paths_valid, "Editor data, config, or cache paths are invalid.");
 
 	// Validate or create each dir and its relevant subdirectories.
diff --git a/editor/editor_plugin.cpp b/editor/editor_plugin.cpp
index 3261e6ddaf..9682a847ca 100644
--- a/editor/editor_plugin.cpp
+++ b/editor/editor_plugin.cpp
@@ -295,7 +295,7 @@ Error EditorInterface::save_scene() {
 	if (!get_edited_scene_root()) {
 		return ERR_CANT_CREATE;
 	}
-	if (get_edited_scene_root()->get_scene_file_path() == String()) {
+	if (get_edited_scene_root()->get_scene_file_path().is_empty()) {
 		return ERR_CANT_CREATE;
 	}
 
diff --git a/editor/editor_plugin_settings.cpp b/editor/editor_plugin_settings.cpp
index aa313f0c50..6aeede78b6 100644
--- a/editor/editor_plugin_settings.cpp
+++ b/editor/editor_plugin_settings.cpp
@@ -165,7 +165,7 @@ Vector<String> EditorPluginSettings::_get_plugins(const String &p_dir) {
 
 	Vector<String> plugins;
 	da->list_dir_begin();
-	for (String path = da->get_next(); path != String(); path = da->get_next()) {
+	for (String path = da->get_next(); !path.is_empty(); path = da->get_next()) {
 		if (path[0] == '.' || !da->current_is_dir()) {
 			continue;
 		}
diff --git a/editor/editor_properties.cpp b/editor/editor_properties.cpp
index 5280a8e7d3..07df2cedd5 100644
--- a/editor/editor_properties.cpp
+++ b/editor/editor_properties.cpp
@@ -380,7 +380,7 @@ void EditorPropertyPath::_path_pressed() {
 		dialog->set_file_mode(save_mode ? EditorFileDialog::FILE_MODE_SAVE_FILE : EditorFileDialog::FILE_MODE_OPEN_FILE);
 		for (int i = 0; i < extensions.size(); i++) {
 			String e = extensions[i].strip_edges();
-			if (e != String()) {
+			if (!e.is_empty()) {
 				dialog->add_filter(extensions[i].strip_edges());
 			}
 		}
@@ -706,7 +706,7 @@ void EditorPropertyFlags::setup(const Vector<String> &p_options) {
 	bool first = true;
 	for (int i = 0; i < p_options.size(); i++) {
 		String option = p_options[i].strip_edges();
-		if (option != "") {
+		if (!option.is_empty()) {
 			CheckBox *cb = memnew(CheckBox);
 			cb->set_text(option);
 			cb->set_clip_text(true);
@@ -1055,7 +1055,7 @@ void EditorPropertyLayers::setup(LayerType p_layer_type) {
 			name = ProjectSettings::get_singleton()->get(basename + vformat("/layer_%d", i + 1));
 		}
 
-		if (name == "") {
+		if (name.is_empty()) {
 			name = vformat(TTR("Layer %d"), i + 1);
 		}
 
@@ -1186,7 +1186,7 @@ void EditorPropertyObjectID::_edit_pressed() {
 
 void EditorPropertyObjectID::update_property() {
 	String type = base_type;
-	if (type == "") {
+	if (type.is_empty()) {
 		type = "Object";
 	}
 
@@ -3229,7 +3229,7 @@ static EditorPropertyRangeHint _parse_range_hint(PropertyHint p_hint, const Stri
 		}
 	}
 
-	if ((hint.radians || degrees) && hint.suffix == String()) {
+	if ((hint.radians || degrees) && hint.suffix.is_empty()) {
 		hint.suffix = U"\u00B0";
 	}
 
@@ -3514,10 +3514,10 @@ EditorProperty *EditorInspectorDefaultPlugin::get_editor_for_property(Object *p_
 		} break;
 		case Variant::NODE_PATH: {
 			EditorPropertyNodePath *editor = memnew(EditorPropertyNodePath);
-			if (p_hint == PROPERTY_HINT_NODE_PATH_TO_EDITED_NODE && p_hint_text != String()) {
+			if (p_hint == PROPERTY_HINT_NODE_PATH_TO_EDITED_NODE && !p_hint_text.is_empty()) {
 				editor->setup(p_hint_text, Vector<StringName>(), (p_usage & PROPERTY_USAGE_NODE_PATH_FROM_SCENE_ROOT));
 			}
-			if (p_hint == PROPERTY_HINT_NODE_PATH_VALID_TYPES && p_hint_text != String()) {
+			if (p_hint == PROPERTY_HINT_NODE_PATH_VALID_TYPES && !p_hint_text.is_empty()) {
 				Vector<String> types = p_hint_text.split(",", false);
 				Vector<StringName> sn = Variant(types); //convert via variant
 				editor->setup(NodePath(), sn, (p_usage & PROPERTY_USAGE_NODE_PATH_FROM_SCENE_ROOT));
diff --git a/editor/editor_properties_array_dict.cpp b/editor/editor_properties_array_dict.cpp
index 0f59c8281f..858de7fb78 100644
--- a/editor/editor_properties_array_dict.cpp
+++ b/editor/editor_properties_array_dict.cpp
@@ -431,7 +431,7 @@ bool EditorPropertyArray::_is_drop_valid(const Dictionary &p_drag_data) const {
 
 	// When the subtype is of type Object, an additional subtype may be specified in the hint string
 	// (e.g. Resource, Texture2D, ShaderMaterial, etc). We want the allowed type to be that, not just "Object".
-	if (subtype == Variant::OBJECT && subtype_hint_string != "") {
+	if (subtype == Variant::OBJECT && !subtype_hint_string.is_empty()) {
 		allowed_type = subtype_hint_string;
 	}
 
diff --git a/editor/editor_resource_picker.cpp b/editor/editor_resource_picker.cpp
index 0703677dc8..6a6634d7e5 100644
--- a/editor/editor_resource_picker.cpp
+++ b/editor/editor_resource_picker.cpp
@@ -52,7 +52,7 @@ void EditorResourcePicker::_update_resource() {
 	} else {
 		assign_button->set_icon(EditorNode::get_singleton()->get_object_icon(edited_resource.operator->(), "Object"));
 
-		if (edited_resource->get_name() != String()) {
+		if (!edited_resource->get_name().is_empty()) {
 			assign_button->set_text(edited_resource->get_name());
 		} else if (edited_resource->get_path().is_resource_file()) {
 			assign_button->set_text(edited_resource->get_path().get_file());
@@ -113,7 +113,7 @@ void EditorResourcePicker::_file_selected(const String &p_path) {
 	RES loaded_resource = ResourceLoader::load(p_path);
 	ERR_FAIL_COND_MSG(loaded_resource.is_null(), "Cannot load resource from path '" + p_path + "'.");
 
-	if (base_type != "") {
+	if (!base_type.is_empty()) {
 		bool any_type_matches = false;
 
 		for (int i = 0; i < base_type.get_slice_count(","); i++) {
@@ -180,7 +180,7 @@ void EditorResourcePicker::_update_menu_items() {
 	RES cb = EditorSettings::get_singleton()->get_resource_clipboard();
 	bool paste_valid = false;
 	if (cb.is_valid()) {
-		if (base_type == "") {
+		if (base_type.is_empty()) {
 			paste_valid = true;
 		} else {
 			for (int i = 0; i < base_type.get_slice_count(","); i++) {
@@ -391,7 +391,7 @@ void EditorResourcePicker::set_create_options(Object *p_menu_node) {
 	}
 
 	// By default provide generic "New ..." options.
-	if (base_type != "") {
+	if (!base_type.is_empty()) {
 		int idx = 0;
 
 		Set<String> allowed_types;
@@ -571,7 +571,7 @@ bool EditorResourcePicker::_is_drop_valid(const Dictionary &p_drag_data) const {
 			String file = files[0];
 
 			String file_type = EditorFileSystem::get_singleton()->get_file_type(file);
-			if (file_type != "" && _is_type_valid(file_type, allowed_types)) {
+			if (!file_type.is_empty() && _is_type_valid(file_type, allowed_types)) {
 				return true;
 			}
 		}
diff --git a/editor/editor_resource_preview.cpp b/editor/editor_resource_preview.cpp
index e9c0b40268..15fc3b1db3 100644
--- a/editor/editor_resource_preview.cpp
+++ b/editor/editor_resource_preview.cpp
@@ -141,7 +141,7 @@ void EditorResourcePreview::_generate_preview(Ref<ImageTexture> &r_texture, Ref<
 		type = ResourceLoader::get_resource_type(p_item.path);
 	}
 
-	if (type == "") {
+	if (type.is_empty()) {
 		r_texture = Ref<ImageTexture>();
 		r_small_texture = Ref<ImageTexture>();
 		return; //could not guess type
diff --git a/editor/editor_run.cpp b/editor/editor_run.cpp
index 3f4418d5f2..92dae89b33 100644
--- a/editor/editor_run.cpp
+++ b/editor/editor_run.cpp
@@ -180,7 +180,7 @@ Error EditorRun::run(const String &p_scene) {
 		args.push_back("--skip-breakpoints");
 	}
 
-	if (p_scene != "") {
+	if (!p_scene.is_empty()) {
 		args.push_back(p_scene);
 	}
 
@@ -244,7 +244,7 @@ Error EditorRun::run(const String &p_scene) {
 	}
 
 	status = STATUS_PLAY;
-	if (p_scene != "") {
+	if (!p_scene.is_empty()) {
 		running_scene = p_scene;
 	}
 
diff --git a/editor/editor_sectioned_inspector.cpp b/editor/editor_sectioned_inspector.cpp
index 751cc7a574..c7a9171709 100644
--- a/editor/editor_sectioned_inspector.cpp
+++ b/editor/editor_sectioned_inspector.cpp
@@ -45,7 +45,7 @@ class SectionedInspectorFilter : public Object {
 		}
 
 		String name = p_name;
-		if (section != "") {
+		if (!section.is_empty()) {
 			name = section + "/" + name;
 		}
 
@@ -60,7 +60,7 @@ class SectionedInspectorFilter : public Object {
 		}
 
 		String name = p_name;
-		if (section != "") {
+		if (!section.is_empty()) {
 			name = section + "/" + name;
 		}
 
@@ -155,7 +155,7 @@ String SectionedInspector::get_current_section() const {
 String SectionedInspector::get_full_item_path(const String &p_item) {
 	String base = get_current_section();
 
-	if (base != "") {
+	if (!base.is_empty()) {
 		return base + "/" + p_item;
 	} else {
 		return p_item;
diff --git a/editor/editor_settings.cpp b/editor/editor_settings.cpp
index 613e0ba7a0..95248b22b5 100644
--- a/editor/editor_settings.cpp
+++ b/editor/editor_settings.cpp
@@ -389,14 +389,14 @@ void EditorSettings::_load_defaults(Ref<ConfigFile> p_extra_config) {
 				best = locale;
 			}
 
-			if (best == String() && host_lang.begins_with(locale)) {
+			if (best.is_empty() && host_lang.begins_with(locale)) {
 				best = locale;
 			}
 
 			etl++;
 		}
 
-		if (best == String()) {
+		if (best.is_empty()) {
 			best = "en";
 		}
 
@@ -989,7 +989,7 @@ void EditorSettings::setup_network() {
 		if (ip == current) {
 			selected = ip;
 		}
-		if (hint != "") {
+		if (!hint.is_empty()) {
 			hint += ",";
 		}
 		hint += ip;
@@ -1008,7 +1008,7 @@ void EditorSettings::save() {
 		return;
 	}
 
-	if (singleton->config_file_path == "") {
+	if (singleton->config_file_path.is_empty()) {
 		ERR_PRINT("Cannot save EditorSettings config, no valid path");
 		return;
 	}
@@ -1218,7 +1218,7 @@ void EditorSettings::load_favorites() {
 	FileAccess *f = FileAccess::open(get_project_settings_dir().plus_file("favorites"), FileAccess::READ);
 	if (f) {
 		String line = f->get_line().strip_edges();
-		while (line != "") {
+		while (!line.is_empty()) {
 			favorites.push_back(line);
 			line = f->get_line().strip_edges();
 		}
@@ -1228,7 +1228,7 @@ void EditorSettings::load_favorites() {
 	f = FileAccess::open(get_project_settings_dir().plus_file("recent_dirs"), FileAccess::READ);
 	if (f) {
 		String line = f->get_line().strip_edges();
-		while (line != "") {
+		while (!line.is_empty()) {
 			recent_dirs.push_back(line);
 			line = f->get_line().strip_edges();
 		}
@@ -1252,7 +1252,7 @@ void EditorSettings::list_text_editor_themes() {
 		List<String> custom_themes;
 		d->list_dir_begin();
 		String file = d->get_next();
-		while (file != String()) {
+		while (!file.is_empty()) {
 			if (file.get_extension() == "tet" && !_is_default_text_editor_theme(file.get_basename().to_lower())) {
 				custom_themes.push_back(file.get_basename());
 			}
@@ -1371,7 +1371,7 @@ Vector<String> EditorSettings::get_script_templates(const String &p_extension, c
 	if (d) {
 		d->list_dir_begin();
 		String file = d->get_next();
-		while (file != String()) {
+		while (!file.is_empty()) {
 			if (file.get_extension() == p_extension) {
 				templates.push_back(file.get_basename());
 			}
diff --git a/editor/editor_spin_slider.cpp b/editor/editor_spin_slider.cpp
index 5565ec8f90..c0fa259deb 100644
--- a/editor/editor_spin_slider.cpp
+++ b/editor/editor_spin_slider.cpp
@@ -262,9 +262,9 @@ void EditorSpinSlider::_update_value_input_stylebox() {
 	// The margin values below were determined by empirical testing.
 	if (is_layout_rtl()) {
 		stylebox->set_default_margin(SIDE_LEFT, 0);
-		stylebox->set_default_margin(SIDE_RIGHT, (get_label() != String() ? 23 : 16) * EDSCALE);
+		stylebox->set_default_margin(SIDE_RIGHT, (!get_label().is_empty() ? 23 : 16) * EDSCALE);
 	} else {
-		stylebox->set_default_margin(SIDE_LEFT, (get_label() != String() ? 23 : 16) * EDSCALE);
+		stylebox->set_default_margin(SIDE_LEFT, (!get_label().is_empty() ? 23 : 16) * EDSCALE);
 		stylebox->set_default_margin(SIDE_RIGHT, 0);
 	}
 
@@ -308,7 +308,7 @@ void EditorSpinSlider::_draw_spin_slider() {
 		lc = fc;
 	}
 
-	if (flat && label != String()) {
+	if (flat && !label.is_empty()) {
 		Color label_bg_color = get_theme_color(SNAME("dark_color_3"), SNAME("Editor"));
 		if (rtl) {
 			draw_rect(Rect2(Vector2(size.width - (sb->get_offset().x * 2 + label_width), 0), Vector2(sb->get_offset().x * 2 + label_width, size.height)), label_bg_color);
diff --git a/editor/editor_themes.cpp b/editor/editor_themes.cpp
index 637394d136..7bbac11754 100644
--- a/editor/editor_themes.cpp
+++ b/editor/editor_themes.cpp
@@ -1553,7 +1553,7 @@ Ref<Theme> create_custom_theme(const Ref<Theme> p_theme) {
 	Ref<Theme> theme = create_editor_theme(p_theme);
 
 	const String custom_theme_path = EditorSettings::get_singleton()->get("interface/theme/custom_theme");
-	if (custom_theme_path != "") {
+	if (!custom_theme_path.is_empty()) {
 		Ref<Theme> custom_theme = ResourceLoader::load(custom_theme_path);
 		if (custom_theme.is_valid()) {
 			theme->merge_with(custom_theme);
diff --git a/editor/export_template_manager.cpp b/editor/export_template_manager.cpp
index f63fcb2938..d9613687f1 100644
--- a/editor/export_template_manager.cpp
+++ b/editor/export_template_manager.cpp
@@ -53,7 +53,7 @@ void ExportTemplateManager::_update_template_status() {
 	da->list_dir_begin();
 	if (err == OK) {
 		String c = da->get_next();
-		while (c != String()) {
+		while (!c.is_empty()) {
 			if (da->current_is_dir() && !c.begins_with(".")) {
 				templates.insert(c);
 			}
@@ -424,7 +424,7 @@ bool ExportTemplateManager::_install_file_selected(const String &p_file, bool p_
 		ret = unzGoToNextFile(pkg);
 	}
 
-	if (version == String()) {
+	if (version.is_empty()) {
 		EditorNode::get_singleton()->show_warning(TTR("No version.txt found inside the export templates file."));
 		unzClose(pkg);
 		return false;
diff --git a/editor/fileserver/editor_file_server.cpp b/editor/fileserver/editor_file_server.cpp
index 8f019a95fd..66bcbb4d5d 100644
--- a/editor/fileserver/editor_file_server.cpp
+++ b/editor/fileserver/editor_file_server.cpp
@@ -88,7 +88,7 @@ void EditorFileServer::_subthread_start(void *s) {
 			ERR_FAIL();
 		}
 	} else {
-		if (cd->efs->password != "") {
+		if (!cd->efs->password.is_empty()) {
 			encode_uint32(ERR_INVALID_DATA, buf4);
 			cd->connection->put_data(buf4, 4);
 			OS::get_singleton()->delay_usec(1000000);
diff --git a/editor/filesystem_dock.cpp b/editor/filesystem_dock.cpp
index 39452b7192..72fc9fbc6e 100644
--- a/editor/filesystem_dock.cpp
+++ b/editor/filesystem_dock.cpp
@@ -64,7 +64,7 @@ bool FileSystemDock::_create_tree(TreeItem *p_parent, EditorFileSystemDirectory
 	// Create a tree item for the subdirectory.
 	TreeItem *subdirectory_item = tree->create_item(p_parent);
 	String dname = p_dir->get_name();
-	if (dname == "") {
+	if (dname.is_empty()) {
 		dname = "res://";
 	}
 
@@ -923,7 +923,7 @@ void FileSystemDock::_update_file_list(bool p_keep_selection) {
 			files->select(item_index, false);
 		}
 
-		if (!p_keep_selection && file != "" && fname == file) {
+		if (!p_keep_selection && !file.is_empty() && fname == file) {
 			files->select(item_index, true);
 			files->ensure_current_is_visible();
 		}
@@ -1670,7 +1670,7 @@ Vector<String> FileSystemDock::_remove_self_included_paths(Vector<String> select
 		selected_strings.sort_custom<NaturalNoCaseComparator>();
 		String last_path = "";
 		for (int i = 0; i < selected_strings.size(); i++) {
-			if (last_path != "" && selected_strings[i].begins_with(last_path)) {
+			if (!last_path.is_empty() && selected_strings[i].begins_with(last_path)) {
 				selected_strings.remove_at(i);
 				i--;
 			}
@@ -2016,7 +2016,7 @@ void FileSystemDock::_search_changed(const String &p_text, const Control *p_from
 		tree_search_box->set_text(searched_string);
 	}
 
-	bool unfold_path = (p_text == String() && path != String());
+	bool unfold_path = (p_text.is_empty() && !path.is_empty());
 	switch (display_mode) {
 		case DISPLAY_MODE_TREE_ONLY: {
 			_update_tree(searched_string.length() == 0 ? uncollapsed_paths_before_search : Vector<String>(), false, false, unfold_path);
@@ -2665,7 +2665,7 @@ void FileSystemDock::_get_imported_files(const String &p_path, Vector<String> &f
 	DirAccess *da = DirAccess::open(p_path);
 	da->list_dir_begin();
 	String n = da->get_next();
-	while (n != String()) {
+	while (!n.is_empty()) {
 		if (n != "." && n != ".." && !n.ends_with(".import")) {
 			String npath = p_path + n + (da->current_is_dir() ? "/" : "");
 			_get_imported_files(npath, files);
@@ -2720,7 +2720,7 @@ void FileSystemDock::_update_import_dock() {
 		if (cf->has_section_key("remap", "type")) {
 			type = cf->get_value("remap", "type");
 		}
-		if (import_type == "") {
+		if (import_type.is_empty()) {
 			import_type = type;
 		} else if (import_type != type) {
 			// All should be the same type.
diff --git a/editor/find_in_files.cpp b/editor/find_in_files.cpp
index 56356ff25b..9f7abfa19d 100644
--- a/editor/find_in_files.cpp
+++ b/editor/find_in_files.cpp
@@ -114,7 +114,7 @@ void FindInFiles::_notification(int p_notification) {
 }
 
 void FindInFiles::start() {
-	if (_pattern == "") {
+	if (_pattern.is_empty()) {
 		print_verbose("Nothing to search, pattern is empty");
 		emit_signal(SNAME(SIGNAL_FINISHED));
 		return;
@@ -224,7 +224,7 @@ void FindInFiles::_scan_dir(String path, PackedStringArray &out_folders) {
 	for (int i = 0; i < 1000; ++i) {
 		String file = dir->get_next();
 
-		if (file == "") {
+		if (file.is_empty()) {
 			break;
 		}
 
diff --git a/editor/groups_editor.cpp b/editor/groups_editor.cpp
index ce5e0e03fd..788c7dc029 100644
--- a/editor/groups_editor.cpp
+++ b/editor/groups_editor.cpp
@@ -227,7 +227,7 @@ void GroupDialog::_group_renamed() {
 		}
 	}
 
-	if (name == "") {
+	if (name.is_empty()) {
 		renamed_group->set_text(0, selected_group);
 		error->set_text(TTR("Invalid group name."));
 		error->popup_centered();
diff --git a/editor/import/collada.cpp b/editor/import/collada.cpp
index c34379f1ec..c1f577f176 100644
--- a/editor/import/collada.cpp
+++ b/editor/import/collada.cpp
@@ -1362,7 +1362,7 @@ Collada::Node *Collada::_parse_visual_instance_geometry(XMLParser &parser) {
 			} else if (parser.get_node_name() == "skeleton") {
 				parser.read();
 				String uri = _uri_to_id(parser.get_node_data());
-				if (uri != "") {
+				if (!uri.is_empty()) {
 					geom->skeletons.push_back(uri);
 				}
 			}
@@ -1464,7 +1464,7 @@ Collada::Node *Collada::_parse_visual_scene_node(XMLParser &parser) {
 
 	bool found_name = false;
 
-	if (id == "") {
+	if (id.is_empty()) {
 		id = "%NODEID%" + itos(Math::rand());
 
 	} else {
@@ -1479,7 +1479,7 @@ Collada::Node *Collada::_parse_visual_scene_node(XMLParser &parser) {
 	Node *node = nullptr;
 
 	name = parser.has_attribute("name") ? parser.get_attribute_value_safe("name") : parser.get_attribute_value_safe("id");
-	if (name == "") {
+	if (name.is_empty()) {
 		name = id;
 	} else {
 		found_name = true;
@@ -1499,7 +1499,7 @@ Collada::Node *Collada::_parse_visual_scene_node(XMLParser &parser) {
 			joint->sid = parser.get_attribute_value_safe("name");
 		}
 
-		if (joint->sid != "") {
+		if (!joint->sid.is_empty()) {
 			state.sid_to_node_map[joint->sid] = id;
 		}
 
@@ -1696,16 +1696,16 @@ void Collada::_parse_animation(XMLParser &parser) {
 				source_param_types[current_source] = Vector<String>();
 
 			} else if (name == "float_array") {
-				if (current_source != "") {
+				if (!current_source.is_empty()) {
 					float_sources[current_source] = _read_float_array(parser);
 				}
 
 			} else if (name == "Name_array") {
-				if (current_source != "") {
+				if (!current_source.is_empty()) {
 					string_sources[current_source] = _read_string_array(parser);
 				}
 			} else if (name == "accessor") {
-				if (current_source != "" && parser.has_attribute("stride")) {
+				if (!current_source.is_empty() && parser.has_attribute("stride")) {
 					source_strides[current_source] = parser.get_attribute_value("stride").to_int();
 				}
 			} else if (name == "sampler") {
@@ -1725,7 +1725,7 @@ void Collada::_parse_animation(XMLParser &parser) {
 				}
 
 			} else if (name == "input") {
-				if (current_sampler != "") {
+				if (!current_sampler.is_empty()) {
 					samplers[current_sampler][parser.get_attribute_value("semantic")] = parser.get_attribute_value("source");
 				}
 
@@ -1838,7 +1838,7 @@ void Collada::_parse_animation(XMLParser &parser) {
 					track.component = track.param.get_slice(".", 1).to_upper();
 				}
 				track.param = track.param.get_slice(".", 0);
-				if (names.size() > 1 && track.component == "") {
+				if (names.size() > 1 && track.component.is_empty()) {
 					//this is a guess because the collada spec is ambiguous here...
 					//i suppose if you have many names (outputs) you can't use a component and i should abide to that.
 					track.component = name;
@@ -1855,7 +1855,7 @@ void Collada::_parse_animation(XMLParser &parser) {
 
 			state.referenced_tracks[target].push_back(state.animation_tracks.size() - 1);
 
-			if (id != "") {
+			if (!id.is_empty()) {
 				if (!state.by_id_tracks.has(id)) {
 					state.by_id_tracks[id] = Vector<int>();
 				}
@@ -1953,10 +1953,10 @@ void Collada::_parse_library(XMLParser &parser) {
 				while (parser.read() == OK) {
 					if (parser.get_node_type() == XMLParser::NODE_ELEMENT) {
 						if (parser.get_node_name() == "mesh") {
-							state.mesh_name_map[id] = (name2 != "") ? name2 : id;
+							state.mesh_name_map[id] = (!name2.is_empty()) ? name2 : id;
 							_parse_mesh_geometry(parser, id, name2);
 						} else if (parser.get_node_name() == "spline") {
-							state.mesh_name_map[id] = (name2 != "") ? name2 : id;
+							state.mesh_name_map[id] = (!name2.is_empty()) ? name2 : id;
 							_parse_curve_geometry(parser, id, name2);
 						} else if (!parser.is_empty()) {
 							parser.skip_section();
@@ -2286,7 +2286,7 @@ void Collada::_find_morph_nodes(VisualScene *p_vscene, Node *p_node) {
 		if (nj->controller) {
 			String base = nj->source;
 
-			while (base != "" && !state.mesh_data_map.has(base)) {
+			while (!base.is_empty() && !state.mesh_data_map.has(base)) {
 				if (state.skin_controller_data_map.has(base)) {
 					SkinControllerData &sk = state.skin_controller_data_map[base];
 					base = sk.base;
diff --git a/editor/import/dynamicfont_import_settings.cpp b/editor/import/dynamicfont_import_settings.cpp
index 83c0f56d87..b63c2bf350 100644
--- a/editor/import/dynamicfont_import_settings.cpp
+++ b/editor/import/dynamicfont_import_settings.cpp
@@ -1597,7 +1597,7 @@ DynamicFontImportSettings::DynamicFontImportSettings() {
 
 	menu_langs = memnew(PopupMenu);
 	menu_langs->set_name("Language");
-	for (int i = 0; langs[i].name != String(); i++) {
+	for (int i = 0; !langs[i].name.is_empty(); i++) {
 		if (langs[i].name == "-") {
 			menu_langs->add_separator();
 		} else {
@@ -1609,7 +1609,7 @@ DynamicFontImportSettings::DynamicFontImportSettings() {
 
 	menu_scripts = memnew(PopupMenu);
 	menu_scripts->set_name("Script");
-	for (int i = 0; scripts[i].name != String(); i++) {
+	for (int i = 0; !scripts[i].name.is_empty(); i++) {
 		if (scripts[i].name == "-") {
 			menu_scripts->add_separator();
 		} else {
@@ -1826,7 +1826,7 @@ DynamicFontImportSettings::DynamicFontImportSettings() {
 	glyph_tree->connect("item_selected", callable_mp(this, &DynamicFontImportSettings::_range_selected));
 	glyph_tree->set_v_size_flags(Control::SIZE_EXPAND_FILL);
 	glyph_root = glyph_tree->create_item();
-	for (int i = 0; unicode_ranges[i].name != String(); i++) {
+	for (int i = 0; !unicode_ranges[i].name.is_empty(); i++) {
 		_add_glyph_range_item(unicode_ranges[i].start, unicode_ranges[i].end, unicode_ranges[i].name);
 	}
 
diff --git a/editor/import/editor_import_collada.cpp b/editor/import/editor_import_collada.cpp
index 076c0cc62b..91f8e5b910 100644
--- a/editor/import/editor_import_collada.cpp
+++ b/editor/import/editor_import_collada.cpp
@@ -303,7 +303,7 @@ Error ColladaImport::_create_scene(Collada::Node *p_node, Node3D *p_parent) {
 		} break;
 	}
 
-	if (p_node->name != "") {
+	if (!p_node->name.is_empty()) {
 		node->set_name(p_node->name);
 	}
 	NodeMap nm;
@@ -317,7 +317,7 @@ Error ColladaImport::_create_scene(Collada::Node *p_node, Node3D *p_parent) {
 	p_parent->add_child(node, true);
 	node->set_owner(scene);
 
-	if (p_node->empty_draw_type != "") {
+	if (!p_node->empty_draw_type.is_empty()) {
 		node->set_meta("empty_draw_type", Variant(p_node->empty_draw_type));
 	}
 
@@ -340,9 +340,9 @@ Error ColladaImport::_create_material(const String &p_target) {
 	Ref<StandardMaterial3D> material = memnew(StandardMaterial3D);
 
 	String base_name;
-	if (src_mat.name != "") {
+	if (!src_mat.name.is_empty()) {
 		base_name = src_mat.name;
-	} else if (effect.name != "") {
+	} else if (!effect.name.is_empty()) {
 		base_name = effect.name;
 	} else {
 		base_name = "Material";
@@ -360,9 +360,9 @@ Error ColladaImport::_create_material(const String &p_target) {
 
 	// DIFFUSE
 
-	if (effect.diffuse.texture != "") {
+	if (!effect.diffuse.texture.is_empty()) {
 		String texfile = effect.get_texture_path(effect.diffuse.texture, collada);
-		if (texfile != "") {
+		if (!texfile.is_empty()) {
 			if (texfile.begins_with("/")) {
 				texfile = texfile.replace_first("/", "res://");
 			}
@@ -381,9 +381,9 @@ Error ColladaImport::_create_material(const String &p_target) {
 
 	// SPECULAR
 
-	if (effect.specular.texture != "") {
+	if (!effect.specular.texture.is_empty()) {
 		String texfile = effect.get_texture_path(effect.specular.texture, collada);
-		if (texfile != "") {
+		if (!texfile.is_empty()) {
 			if (texfile.begins_with("/")) {
 				texfile = texfile.replace_first("/", "res://");
 			}
@@ -406,9 +406,9 @@ Error ColladaImport::_create_material(const String &p_target) {
 
 	// EMISSION
 
-	if (effect.emission.texture != "") {
+	if (!effect.emission.texture.is_empty()) {
 		String texfile = effect.get_texture_path(effect.emission.texture, collada);
-		if (texfile != "") {
+		if (!texfile.is_empty()) {
 			if (texfile.begins_with("/")) {
 				texfile = texfile.replace_first("/", "res://");
 			}
@@ -433,9 +433,9 @@ Error ColladaImport::_create_material(const String &p_target) {
 
 	// NORMAL
 
-	if (effect.bump.texture != "") {
+	if (!effect.bump.texture.is_empty()) {
 		String texfile = effect.get_texture_path(effect.bump.texture, collada);
-		if (texfile != "") {
+		if (!texfile.is_empty()) {
 			if (texfile.begins_with("/")) {
 				texfile = texfile.replace_first("/", "res://");
 			}
@@ -525,7 +525,7 @@ Error ColladaImport::_create_mesh_surfaces(bool p_optimize, Ref<ImporterMesh> &p
 				normal_ofs = vertex_ofs;
 			}
 
-			if (normal_source_id != "") {
+			if (!normal_source_id.is_empty()) {
 				ERR_FAIL_COND_V(!meshdata.sources.has(normal_source_id), ERR_INVALID_DATA);
 				normal_src = &meshdata.sources[normal_source_id];
 			}
@@ -545,7 +545,7 @@ Error ColladaImport::_create_mesh_surfaces(bool p_optimize, Ref<ImporterMesh> &p
 				binormal_ofs = vertex_ofs;
 			}
 
-			if (binormal_source_id != "") {
+			if (!binormal_source_id.is_empty()) {
 				ERR_FAIL_COND_V(!meshdata.sources.has(binormal_source_id), ERR_INVALID_DATA);
 				binormal_src = &meshdata.sources[binormal_source_id];
 			}
@@ -565,7 +565,7 @@ Error ColladaImport::_create_mesh_surfaces(bool p_optimize, Ref<ImporterMesh> &p
 				tangent_ofs = vertex_ofs;
 			}
 
-			if (tangent_source_id != "") {
+			if (!tangent_source_id.is_empty()) {
 				ERR_FAIL_COND_V(!meshdata.sources.has(tangent_source_id), ERR_INVALID_DATA);
 				tangent_src = &meshdata.sources[tangent_source_id];
 			}
@@ -585,7 +585,7 @@ Error ColladaImport::_create_mesh_surfaces(bool p_optimize, Ref<ImporterMesh> &p
 				uv_ofs = vertex_ofs;
 			}
 
-			if (uv_source_id != "") {
+			if (!uv_source_id.is_empty()) {
 				ERR_FAIL_COND_V(!meshdata.sources.has(uv_source_id), ERR_INVALID_DATA);
 				uv_src = &meshdata.sources[uv_source_id];
 			}
@@ -605,7 +605,7 @@ Error ColladaImport::_create_mesh_surfaces(bool p_optimize, Ref<ImporterMesh> &p
 				uv2_ofs = vertex_ofs;
 			}
 
-			if (uv2_source_id != "") {
+			if (!uv2_source_id.is_empty()) {
 				ERR_FAIL_COND_V(!meshdata.sources.has(uv2_source_id), ERR_INVALID_DATA);
 				uv2_src = &meshdata.sources[uv2_source_id];
 			}
@@ -625,7 +625,7 @@ Error ColladaImport::_create_mesh_surfaces(bool p_optimize, Ref<ImporterMesh> &p
 				color_ofs = vertex_ofs;
 			}
 
-			if (color_source_id != "") {
+			if (!color_source_id.is_empty()) {
 				ERR_FAIL_COND_V(!meshdata.sources.has(color_source_id), ERR_INVALID_DATA);
 				color_src = &meshdata.sources[color_source_id];
 			}
@@ -914,7 +914,7 @@ Error ColladaImport::_create_mesh_surfaces(bool p_optimize, Ref<ImporterMesh> &p
 						material = material_cache[target];
 					}
 
-				} else if (p.material != "") {
+				} else if (!p.material.is_empty()) {
 					WARN_PRINT("Collada: Unreferenced material in geometry instance: " + p.material);
 				}
 			}
@@ -1198,7 +1198,7 @@ Error ColladaImport::_create_resources(Collada::Node *p_node, bool p_use_compres
 					}
 				}
 
-				ERR_FAIL_COND_V_MSG(ngsource != "", ERR_INVALID_DATA, "Controller instance source '" + ngsource + "' is neither skin or morph!");
+				ERR_FAIL_COND_V_MSG(!ngsource.is_empty(), ERR_INVALID_DATA, "Controller instance source '" + ngsource + "' is neither skin or morph!");
 
 			} else {
 				meshid = ng2->source;
@@ -1215,13 +1215,13 @@ Error ColladaImport::_create_resources(Collada::Node *p_node, bool p_use_compres
 					mesh = Ref<ImporterMesh>(memnew(ImporterMesh));
 					const Collada::MeshData &meshdata = collada.state.mesh_data_map[meshid];
 					String name = meshdata.name;
-					if (name == "") {
+					if (name.is_empty()) {
 						name = "Mesh";
 					}
 					int counter = 2;
 					while (mesh_unique_names.has(name)) {
 						name = meshdata.name;
-						if (name == "") {
+						if (name.is_empty()) {
 							name = "Mesh";
 						}
 						name += itos(counter++);
@@ -1261,7 +1261,7 @@ Error ColladaImport::_create_resources(Collada::Node *p_node, bool p_use_compres
 							}
 
 							mi->set_surface_material(i, material);
-						} else if (matname != "") {
+						} else if (!matname.is_empty()) {
 							WARN_PRINT("Collada: Unreferenced material in geometry instance: " + matname);
 						}
 					}
@@ -1343,7 +1343,7 @@ void ColladaImport::_fix_param_animation_tracks() {
 				// test source(s)
 				String source = ng->source;
 
-				while (source != "") {
+				while (!source.is_empty()) {
 					if (collada.state.skin_controller_data_map.has(source)) {
 						const Collada::SkinControllerData &skin = collada.state.skin_controller_data_map[source];
 
@@ -1796,7 +1796,7 @@ Node *EditorSceneFormatImporterCollada::import_scene(const String &p_path, uint3
 		AnimationPlayer *ap = memnew(AnimationPlayer);
 		for (int i = 0; i < state.animations.size(); i++) {
 			String name;
-			if (state.animations[i]->get_name() == "") {
+			if (state.animations[i]->get_name().is_empty()) {
 				name = "default";
 			} else {
 				name = state.animations[i]->get_name();
diff --git a/editor/import/resource_importer_csv_translation.cpp b/editor/import/resource_importer_csv_translation.cpp
index 7948d9e577..7a226802f2 100644
--- a/editor/import/resource_importer_csv_translation.cpp
+++ b/editor/import/resource_importer_csv_translation.cpp
@@ -113,7 +113,7 @@ Error ResourceImporterCSVTranslation::import(const String &p_source_file, const
 
 	while (line.size() == locales.size() + 1) {
 		String key = line[0];
-		if (key != "") {
+		if (!key.is_empty()) {
 			for (int i = 1; i < line.size(); i++) {
 				translations.write[i - 1]->add_message(key, line[i].c_unescape());
 			}
diff --git a/editor/import/resource_importer_obj.cpp b/editor/import/resource_importer_obj.cpp
index bb68de99b1..9e3cdbdeff 100644
--- a/editor/import/resource_importer_obj.cpp
+++ b/editor/import/resource_importer_obj.cpp
@@ -235,7 +235,7 @@ static Error _parse_obj(const String &p_path, List<Ref<Mesh>> &r_meshes, bool p_
 		while (l.length() && l[l.length() - 1] == '\\') {
 			String add = f->get_line().strip_edges();
 			l += add;
-			if (add == String()) {
+			if (add.is_empty()) {
 				break;
 			}
 		}
@@ -301,7 +301,7 @@ static Error _parse_obj(const String &p_path, List<Ref<Mesh>> &r_meshes, bool p_
 						surf_tool->set_normal(normals[norm]);
 					}
 
-					if (face[idx].size() >= 2 && face[idx][1] != String()) {
+					if (face[idx].size() >= 2 && !face[idx][1].is_empty()) {
 						int uv = face[idx][1].to_int() - 1;
 						if (uv < 0) {
 							uv += uvs.size() + 1;
@@ -363,9 +363,9 @@ static Error _parse_obj(const String &p_path, List<Ref<Mesh>> &r_meshes, bool p_
 
 				mesh = surf_tool->commit(mesh, mesh_flags);
 
-				if (current_material != String()) {
+				if (!current_material.is_empty()) {
 					mesh->surface_set_name(mesh->get_surface_count() - 1, current_material.get_basename());
-				} else if (current_group != String()) {
+				} else if (!current_group.is_empty()) {
 					mesh->surface_set_name(mesh->get_surface_count() - 1, current_group);
 				}
 
diff --git a/editor/import/resource_importer_scene.cpp b/editor/import/resource_importer_scene.cpp
index a25b694a60..330c7125fe 100644
--- a/editor/import/resource_importer_scene.cpp
+++ b/editor/import/resource_importer_scene.cpp
@@ -481,7 +481,7 @@ Node *ResourceImporterScene::_pre_fix_node(Node *p_node, Node *p_root, Map<Ref<I
 					fixed_name = _fixstr(name, "convcolonly");
 				}
 
-				ERR_FAIL_COND_V(fixed_name == String(), nullptr);
+				ERR_FAIL_COND_V(fixed_name.is_empty(), nullptr);
 
 				if (shapes.size()) {
 					StaticBody3D *col = memnew(StaticBody3D);
@@ -577,7 +577,7 @@ Node *ResourceImporterScene::_pre_fix_node(Node *p_node, Node *p_root, Map<Ref<I
 				fixed_name = _fixstr(name, "convcol");
 			}
 
-			if (fixed_name != String()) {
+			if (!fixed_name.is_empty()) {
 				if (mi->get_parent() && !mi->get_parent()->has_node(fixed_name)) {
 					mi->set_name(fixed_name);
 				}
@@ -710,7 +710,7 @@ Node *ResourceImporterScene::_post_fix_node(Node *p_node, Node *p_root, Map<Ref<
 							mat_id = mat->get_name();
 						}
 
-						if (mat_id != String() && p_material_data.has(mat_id)) {
+						if (!mat_id.is_empty() && p_material_data.has(mat_id)) {
 							Dictionary matdata = p_material_data[mat_id];
 
 							for (int j = 0; j < post_importer_plugins.size(); j++) {
@@ -1433,7 +1433,7 @@ void ResourceImporterScene::get_import_options(const String &p_path, List<Import
 	String script_ext_hint;
 
 	for (const String &E : script_extentions) {
-		if (script_ext_hint != "") {
+		if (!script_ext_hint.is_empty()) {
 			script_ext_hint += ",";
 		}
 		script_ext_hint += "*." + E;
@@ -1559,7 +1559,7 @@ void ResourceImporterScene::_generate_meshes(Node *p_node, const Dictionary &p_m
 					mesh_id = src_mesh_node->get_mesh()->get_name();
 				}
 
-				if (mesh_id != String() && p_mesh_data.has(mesh_id)) {
+				if (!mesh_id.is_empty() && p_mesh_data.has(mesh_id)) {
 					Dictionary mesh_settings = p_mesh_data[mesh_id];
 
 					if (mesh_settings.has("generate/shadow_meshes")) {
@@ -1649,7 +1649,7 @@ void ResourceImporterScene::_generate_meshes(Node *p_node, const Dictionary &p_m
 					}
 				}
 
-				if (save_to_file != String()) {
+				if (!save_to_file.is_empty()) {
 					Ref<Mesh> existing = Ref<Resource>(ResourceCache::get(save_to_file));
 					if (existing.is_valid()) {
 						//if somehow an existing one is useful, create
@@ -2051,7 +2051,7 @@ Error ResourceImporterScene::import(const String &p_source_file, const String &p
 	String post_import_script_path = p_options["import_script/path"];
 	Ref<EditorScenePostImport> post_import_script;
 
-	if (post_import_script_path != "") {
+	if (!post_import_script_path.is_empty()) {
 		Ref<Script> scr = ResourceLoader::load(post_import_script_path);
 		if (!scr.is_valid()) {
 			EditorNode::add_io_error(TTR("Couldn't load post-import script:") + " " + post_import_script_path);
diff --git a/editor/import/scene_import_settings.cpp b/editor/import/scene_import_settings.cpp
index 5690d49a55..a376596f9b 100644
--- a/editor/import/scene_import_settings.cpp
+++ b/editor/import/scene_import_settings.cpp
@@ -92,7 +92,7 @@ void SceneImportSettings::_fill_material(Tree *p_tree, const Ref<Material> &p_ma
 	if (p_material->has_meta("import_id")) {
 		import_id = p_material->get_meta("import_id");
 		has_import_id = true;
-	} else if (p_material->get_name() != "") {
+	} else if (!p_material->get_name().is_empty()) {
 		import_id = p_material->get_name();
 		has_import_id = true;
 	} else {
@@ -148,7 +148,7 @@ void SceneImportSettings::_fill_mesh(Tree *p_tree, const Ref<Mesh> &p_mesh, Tree
 	if (p_mesh->has_meta("import_id")) {
 		import_id = p_mesh->get_meta("import_id");
 		has_import_id = true;
-	} else if (p_mesh->get_name() != String()) {
+	} else if (!p_mesh->get_name().is_empty()) {
 		import_id = p_mesh->get_name();
 		has_import_id = true;
 	} else {
@@ -414,7 +414,7 @@ void SceneImportSettings::_update_camera() {
 	float rot_y = cam_rot_y;
 	float zoom = cam_zoom;
 
-	if (selected_type == "Node" || selected_type == "") {
+	if (selected_type == "Node" || selected_type.is_empty()) {
 		camera_aabb = contents_aabb;
 	} else {
 		if (mesh_preview->get_mesh().is_valid()) {
diff --git a/editor/import_dock.cpp b/editor/import_dock.cpp
index cc6b4e66e4..3507eaff94 100644
--- a/editor/import_dock.cpp
+++ b/editor/import_dock.cpp
@@ -525,7 +525,7 @@ void ImportDock::_reimport() {
 			Ref<ResourceImporter> importer = ResourceFormatImporter::get_singleton()->get_importer_by_name(importer_name);
 			ERR_CONTINUE(!importer.is_valid());
 			String group_file_property = importer->get_option_group_file();
-			if (group_file_property != String()) {
+			if (!group_file_property.is_empty()) {
 				//can import from a group (as in, atlas)
 				ERR_CONTINUE(!params->values.has(group_file_property));
 				String group_file = params->values[group_file_property];
diff --git a/editor/inspector_dock.cpp b/editor/inspector_dock.cpp
index 5622d0b145..f594a5a3a8 100644
--- a/editor/inspector_dock.cpp
+++ b/editor/inspector_dock.cpp
@@ -312,7 +312,7 @@ void InspectorDock::_prepare_history() {
 			Resource *r = Object::cast_to<Resource>(obj);
 			if (r->get_path().is_resource_file()) {
 				text = r->get_path().get_file();
-			} else if (r->get_name() != String()) {
+			} else if (!r->get_name().is_empty()) {
 				text = r->get_name();
 			} else {
 				text = r->get_class();
@@ -460,7 +460,7 @@ void InspectorDock::open_resource(const String &p_type) {
 
 void InspectorDock::set_warning(const String &p_message) {
 	warning->hide();
-	if (p_message != String()) {
+	if (!p_message.is_empty()) {
 		warning->show();
 		warning_dialog->set_text(p_message);
 	}
diff --git a/editor/multi_node_edit.cpp b/editor/multi_node_edit.cpp
index 1e707c1a60..1a30770b53 100644
--- a/editor/multi_node_edit.cpp
+++ b/editor/multi_node_edit.cpp
@@ -75,7 +75,7 @@ bool MultiNodeEdit::_set_impl(const StringName &p_name, const Variant &p_value,
 			ur->add_do_property(n, name, path);
 		} else {
 			Variant new_value;
-			if (p_field == "") {
+			if (p_field.is_empty()) {
 				// whole value
 				new_value = p_value;
 			} else {
diff --git a/editor/plugins/animation_blend_space_1d_editor.cpp b/editor/plugins/animation_blend_space_1d_editor.cpp
index b9ad18ef51..f16ea36a23 100644
--- a/editor/plugins/animation_blend_space_1d_editor.cpp
+++ b/editor/plugins/animation_blend_space_1d_editor.cpp
@@ -552,7 +552,7 @@ void AnimationNodeBlendSpace1DEditor::_notification(int p_what) {
 
 		if (error != error_label->get_text()) {
 			error_label->set_text(error);
-			if (error != String()) {
+			if (!error.is_empty()) {
 				error_panel->show();
 			} else {
 				error_panel->hide();
diff --git a/editor/plugins/animation_blend_space_2d_editor.cpp b/editor/plugins/animation_blend_space_2d_editor.cpp
index 362b0b6cf7..b107478724 100644
--- a/editor/plugins/animation_blend_space_2d_editor.cpp
+++ b/editor/plugins/animation_blend_space_2d_editor.cpp
@@ -761,7 +761,7 @@ void AnimationNodeBlendSpace2DEditor::_notification(int p_what) {
 
 		if (error != error_label->get_text()) {
 			error_label->set_text(error);
-			if (error != String()) {
+			if (!error.is_empty()) {
 				error_panel->show();
 			} else {
 				error_panel->hide();
diff --git a/editor/plugins/animation_blend_tree_editor_plugin.cpp b/editor/plugins/animation_blend_tree_editor_plugin.cpp
index 2e051b9601..d9a6f19384 100644
--- a/editor/plugins/animation_blend_tree_editor_plugin.cpp
+++ b/editor/plugins/animation_blend_tree_editor_plugin.cpp
@@ -292,7 +292,7 @@ void AnimationNodeBlendTreeEditor::_add_node(int p_idx) {
 		anode = EditorSettings::get_singleton()->get_resource_clipboard();
 		ERR_FAIL_COND(!anode.is_valid());
 		base_name = anode->get_class();
-	} else if (add_options[p_idx].type != String()) {
+	} else if (!add_options[p_idx].type.is_empty()) {
 		AnimationNode *an = Object::cast_to<AnimationNode>(ClassDB::instantiate(add_options[p_idx].type));
 		ERR_FAIL_COND(!an);
 		anode = Ref<AnimationNode>(an);
@@ -600,7 +600,7 @@ bool AnimationNodeBlendTreeEditor::_update_filters(const Ref<AnimationNode> &ano
 		String accum;
 		for (int i = 0; i < path.get_name_count(); i++) {
 			String name = path.get_name(i);
-			if (accum != String()) {
+			if (!accum.is_empty()) {
 				accum += "/";
 			}
 			accum += name;
@@ -752,7 +752,7 @@ void AnimationNodeBlendTreeEditor::_notification(int p_what) {
 
 		if (error != error_label->get_text()) {
 			error_label->set_text(error);
-			if (error != String()) {
+			if (!error.is_empty()) {
 				error_panel->show();
 			} else {
 				error_panel->hide();
@@ -821,13 +821,13 @@ AnimationNodeBlendTreeEditor *AnimationNodeBlendTreeEditor::singleton = nullptr;
 
 void AnimationNodeBlendTreeEditor::_node_renamed(const String &p_text, Ref<AnimationNode> p_node) {
 	String prev_name = blend_tree->get_node_name(p_node);
-	ERR_FAIL_COND(prev_name == String());
+	ERR_FAIL_COND(prev_name.is_empty());
 	GraphNode *gn = Object::cast_to<GraphNode>(graph->get_node(prev_name));
 	ERR_FAIL_COND(!gn);
 
 	const String &new_name = p_text;
 
-	ERR_FAIL_COND(new_name == "" || new_name.find(".") != -1 || new_name.find("/") != -1);
+	ERR_FAIL_COND(new_name.is_empty() || new_name.find(".") != -1 || new_name.find("/") != -1);
 
 	if (new_name == prev_name) {
 		return; //nothing to do
diff --git a/editor/plugins/animation_player_editor_plugin.cpp b/editor/plugins/animation_player_editor_plugin.cpp
index f936871bce..14390511de 100644
--- a/editor/plugins/animation_player_editor_plugin.cpp
+++ b/editor/plugins/animation_player_editor_plugin.cpp
@@ -190,7 +190,7 @@ void AnimationPlayerEditor::_play_pressed() {
 		current = animation->get_item_text(animation->get_selected());
 	}
 
-	if (current != "") {
+	if (!current.is_empty()) {
 		if (current == player->get_assigned_animation()) {
 			player->stop(); //so it won't blend with itself
 		}
@@ -207,7 +207,7 @@ void AnimationPlayerEditor::_play_from_pressed() {
 		current = animation->get_item_text(animation->get_selected());
 	}
 
-	if (current != "") {
+	if (!current.is_empty()) {
 		float time = player->get_current_animation_position();
 
 		if (current == player->get_assigned_animation() && player->is_playing()) {
@@ -228,7 +228,7 @@ void AnimationPlayerEditor::_play_bw_pressed() {
 		current = animation->get_item_text(animation->get_selected());
 	}
 
-	if (current != "") {
+	if (!current.is_empty()) {
 		if (current == player->get_assigned_animation()) {
 			player->stop(); //so it won't blend with itself
 		}
@@ -245,7 +245,7 @@ void AnimationPlayerEditor::_play_bw_from_pressed() {
 		current = animation->get_item_text(animation->get_selected());
 	}
 
-	if (current != "") {
+	if (!current.is_empty()) {
 		float time = player->get_current_animation_position();
 		if (current == player->get_assigned_animation()) {
 			player->stop(); //so it won't blend with itself
@@ -280,7 +280,7 @@ void AnimationPlayerEditor::_animation_selected(int p_which) {
 		current = animation->get_item_text(animation->get_selected());
 	}
 
-	if (current != "") {
+	if (!current.is_empty()) {
 		player->set_assigned_animation(current);
 
 		Ref<Animation> anim = player->get_animation(current);
@@ -397,7 +397,7 @@ void AnimationPlayerEditor::_animation_save_as(const Ref<Resource> &p_resource)
 
 	String path;
 	//file->set_current_path(current_path);
-	if (p_resource->get_path() != "") {
+	if (!p_resource->get_path().is_empty()) {
 		path = p_resource->get_path();
 		if (extensions.size()) {
 			if (extensions.find(p_resource->get_path().get_extension().to_lower()) == nullptr) {
@@ -406,7 +406,7 @@ void AnimationPlayerEditor::_animation_save_as(const Ref<Resource> &p_resource)
 		}
 	} else {
 		if (extensions.size()) {
-			if (p_resource->get_name() != "") {
+			if (!p_resource->get_name().is_empty()) {
 				path = p_resource->get_name() + "." + extensions.front()->get().to_lower();
 			} else {
 				String resource_name_snake_case = p_resource->get_class().camelcase_to_underscore();
@@ -486,7 +486,7 @@ void AnimationPlayerEditor::_animation_name_edited() {
 	player->stop();
 
 	String new_name = name->get_text();
-	if (new_name == "" || new_name.find(":") != -1 || new_name.find("/") != -1) {
+	if (new_name.is_empty() || new_name.find(":") != -1 || new_name.find("/") != -1) {
 		error_dialog->set_text(TTR("Invalid animation name!"));
 		error_dialog->popup_centered();
 		return;
@@ -720,7 +720,7 @@ void AnimationPlayerEditor::_animation_edit() {
 
 void AnimationPlayerEditor::_save_animation(String p_file) {
 	String current = animation->get_item_text(animation->get_selected());
-	if (current != "") {
+	if (!current.is_empty()) {
 		Ref<Animation> anim = player->get_animation(current);
 
 		ERR_FAIL_COND(!Object::cast_to<Resource>(*anim));
@@ -1007,7 +1007,7 @@ void AnimationPlayerEditor::_seek_value_changed(float p_value, bool p_set, bool
 
 	updating = true;
 	String current = player->get_assigned_animation();
-	if (current == "" || !player->has_animation(current)) {
+	if (current.is_empty() || !player->has_animation(current)) {
 		updating = false;
 		current = "";
 		return;
@@ -1086,7 +1086,7 @@ void AnimationPlayerEditor::_animation_tool_menu(int p_option) {
 	}
 
 	Ref<Animation> anim;
-	if (current != String()) {
+	if (!current.is_empty()) {
 		anim = player->get_animation(current);
 	}
 
@@ -1141,7 +1141,7 @@ void AnimationPlayerEditor::_animation_tool_menu(int p_option) {
 			}
 
 			String name = anim2->get_name();
-			if (name == "") {
+			if (name.is_empty()) {
 				name = TTR("Pasted Animation");
 			}
 
diff --git a/editor/plugins/animation_state_machine_editor.cpp b/editor/plugins/animation_state_machine_editor.cpp
index 391565057c..cf3bc58af9 100644
--- a/editor/plugins/animation_state_machine_editor.cpp
+++ b/editor/plugins/animation_state_machine_editor.cpp
@@ -438,7 +438,7 @@ void AnimationNodeStateMachineEditor::_add_menu_type(int p_index) {
 		return;
 	}
 
-	if (base_name == String()) {
+	if (base_name.is_empty()) {
 		base_name = node->get_class().replace_first("AnimationNode", "");
 	}
 
@@ -927,7 +927,7 @@ void AnimationNodeStateMachineEditor::_notification(int p_what) {
 
 		if (error != error_label->get_text()) {
 			error_label->set_text(error);
-			if (error != String()) {
+			if (!error.is_empty()) {
 				error_panel->show();
 			} else {
 				error_panel->hide();
@@ -1059,7 +1059,7 @@ void AnimationNodeStateMachineEditor::_removed_from_graph() {
 void AnimationNodeStateMachineEditor::_name_edited(const String &p_text) {
 	const String &new_name = p_text;
 
-	ERR_FAIL_COND(new_name == "" || new_name.find(".") != -1 || new_name.find("/") != -1);
+	ERR_FAIL_COND(new_name.is_empty() || new_name.find(".") != -1 || new_name.find("/") != -1);
 
 	if (new_name == prev_name) {
 		return; // Nothing to do.
diff --git a/editor/plugins/asset_library_editor_plugin.cpp b/editor/plugins/asset_library_editor_plugin.cpp
index 4f3b5db1da..0925b34ac1 100644
--- a/editor/plugins/asset_library_editor_plugin.cpp
+++ b/editor/plugins/asset_library_editor_plugin.cpp
@@ -343,7 +343,7 @@ void EditorAssetLibraryItemDownload::_http_download_completed(int p_status, int
 			if (p_code != 200) {
 				error_text = TTR("Request failed, return code:") + " " + itos(p_code);
 				status->set_text(TTR("Failed:") + " " + itos(p_code));
-			} else if (sha256 != "") {
+			} else if (!sha256.is_empty()) {
 				String download_sha256 = FileAccess::get_sha256(download->get_download_file());
 				if (sha256 != download_sha256) {
 					error_text = TTR("Bad download hash, assuming file has been tampered with.") + "\n";
@@ -354,7 +354,7 @@ void EditorAssetLibraryItemDownload::_http_download_completed(int p_status, int
 		} break;
 	}
 
-	if (error_text != String()) {
+	if (!error_text.is_empty()) {
 		download_error->set_text(TTR("Asset Download Error:") + "\n" + error_text);
 		download_error->popup_centered();
 		// Let the user retry the download.
@@ -921,7 +921,7 @@ void EditorAssetLibrary::_search(int p_page) {
 			support_list += String(support_key[i]) + "+";
 		}
 	}
-	if (support_list != String()) {
+	if (!support_list.is_empty()) {
 		args += "&support=" + support_list.substr(0, support_list.length() - 1);
 	}
 
@@ -934,7 +934,7 @@ void EditorAssetLibrary::_search(int p_page) {
 		args += "&reverse=true";
 	}
 
-	if (filter->get_text() != String()) {
+	if (!filter->get_text().is_empty()) {
 		args += "&filter=" + filter->get_text().uri_encode();
 	}
 
@@ -1187,7 +1187,7 @@ void EditorAssetLibrary::_http_request_completed(int p_status, int p_code, const
 			library_vb->add_child(asset_bottom_page);
 
 			if (result.is_empty()) {
-				if (filter->get_text() != String()) {
+				if (!filter->get_text().is_empty()) {
 					library_error->set_text(
 							vformat(TTR("No results for \"%s\"."), filter->get_text()));
 				} else {
@@ -1218,7 +1218,7 @@ void EditorAssetLibrary::_http_request_completed(int p_status, int p_code, const
 				item->connect("author_selected", callable_mp(this, &EditorAssetLibrary::_select_author));
 				item->connect("category_selected", callable_mp(this, &EditorAssetLibrary::_select_category));
 
-				if (r.has("icon_url") && r["icon_url"] != "") {
+				if (r.has("icon_url") && !r["icon_url"].operator String().is_empty()) {
 					_request_image(item->get_instance_id(), r["icon_url"], IMAGE_QUEUE_ICON, 0);
 				}
 			}
@@ -1255,7 +1255,7 @@ void EditorAssetLibrary::_http_request_completed(int p_status, int p_code, const
 
 			description->configure(r["title"], r["asset_id"], category_map[r["category_id"]], r["category_id"], r["author"], r["author_id"], r["cost"], r["version"], r["version_string"], r["description"], r["download_url"], r["browse_url"], r["download_hash"]);
 
-			if (r.has("icon_url") && r["icon_url"] != "") {
+			if (r.has("icon_url") && !r["icon_url"].operator String().is_empty()) {
 				_request_image(description->get_instance_id(), r["icon_url"], IMAGE_QUEUE_ICON, 0);
 			}
 
diff --git a/editor/plugins/canvas_item_editor_plugin.cpp b/editor/plugins/canvas_item_editor_plugin.cpp
index d92564581d..4a19e7752e 100644
--- a/editor/plugins/canvas_item_editor_plugin.cpp
+++ b/editor/plugins/canvas_item_editor_plugin.cpp
@@ -1460,7 +1460,7 @@ bool CanvasItemEditor::_gui_input_open_scene_on_double_click(const Ref<InputEven
 		List<CanvasItem *> selection = _get_edited_canvas_items();
 		if (selection.size() == 1) {
 			CanvasItem *canvas_item = selection[0];
-			if (canvas_item->get_scene_file_path() != "" && canvas_item != editor->get_edited_scene()) {
+			if (!canvas_item->get_scene_file_path().is_empty() && canvas_item != editor->get_edited_scene()) {
 				editor->open_request(canvas_item->get_scene_file_path());
 				return true;
 			}
@@ -5843,7 +5843,7 @@ bool CanvasItemEditorViewport::_create_instance(Node *parent, String &path, cons
 		return false;
 	}
 
-	if (editor->get_edited_scene()->get_scene_file_path() != "") { // cyclical instancing
+	if (!editor->get_edited_scene()->get_scene_file_path().is_empty()) { // cyclical instancing
 		if (_cyclical_dependency_exists(editor->get_edited_scene()->get_scene_file_path(), instantiated_scene)) {
 			memdelete(instantiated_scene);
 			return false;
diff --git a/editor/plugins/editor_preview_plugins.cpp b/editor/plugins/editor_preview_plugins.cpp
index 31cb0cd18d..3b85fad345 100644
--- a/editor/plugins/editor_preview_plugins.cpp
+++ b/editor/plugins/editor_preview_plugins.cpp
@@ -477,7 +477,7 @@ Ref<Texture2D> EditorScriptPreviewPlugin::generate(const RES &p_from, const Size
 	}
 
 	String code = scr->get_source_code().strip_edges();
-	if (code == "") {
+	if (code.is_empty()) {
 		return Ref<Texture2D>();
 	}
 
diff --git a/editor/plugins/gpu_particles_collision_sdf_editor_plugin.cpp b/editor/plugins/gpu_particles_collision_sdf_editor_plugin.cpp
index c1a1e44ba2..f6788f80ba 100644
--- a/editor/plugins/gpu_particles_collision_sdf_editor_plugin.cpp
+++ b/editor/plugins/gpu_particles_collision_sdf_editor_plugin.cpp
@@ -34,7 +34,7 @@ void GPUParticlesCollisionSDF3DEditorPlugin::_bake() {
 	if (col_sdf) {
 		if (col_sdf->get_texture().is_null() || !col_sdf->get_texture()->get_path().is_resource_file()) {
 			String path = get_tree()->get_edited_scene_root()->get_scene_file_path();
-			if (path == String()) {
+			if (path.is_empty()) {
 				path = "res://" + col_sdf->get_name() + "_data.exr";
 			} else {
 				String ext = path.get_extension();
diff --git a/editor/plugins/lightmap_gi_editor_plugin.cpp b/editor/plugins/lightmap_gi_editor_plugin.cpp
index 123087446c..d7b469cb74 100644
--- a/editor/plugins/lightmap_gi_editor_plugin.cpp
+++ b/editor/plugins/lightmap_gi_editor_plugin.cpp
@@ -44,10 +44,10 @@ void LightmapGIEditorPlugin::_bake_select_file(const String &p_file) {
 		switch (err) {
 			case LightmapGI::BAKE_ERROR_NO_SAVE_PATH: {
 				String scene_path = lightmap->get_scene_file_path();
-				if (scene_path == String()) {
+				if (scene_path.is_empty()) {
 					scene_path = lightmap->get_owner()->get_scene_file_path();
 				}
-				if (scene_path == String()) {
+				if (scene_path.is_empty()) {
 					EditorNode::get_singleton()->show_warning(TTR("Can't determine a save path for lightmap images.\nSave your scene and try again."));
 					break;
 				}
diff --git a/editor/plugins/mesh_library_editor_plugin.cpp b/editor/plugins/mesh_library_editor_plugin.cpp
index 18e7480287..fd62f632dc 100644
--- a/editor/plugins/mesh_library_editor_plugin.cpp
+++ b/editor/plugins/mesh_library_editor_plugin.cpp
@@ -61,7 +61,7 @@ void MeshLibraryEditor::_menu_update_confirm(bool p_apply_xforms) {
 	cd_update->hide();
 	apply_xforms = p_apply_xforms;
 	String existing = mesh_library->get_meta("_editor_source_scene");
-	ERR_FAIL_COND(existing == "");
+	ERR_FAIL_COND(existing.is_empty());
 	_import_scene_cbk(existing);
 }
 
diff --git a/editor/plugins/multimesh_editor_plugin.cpp b/editor/plugins/multimesh_editor_plugin.cpp
index 5514bccabb..517aca596a 100644
--- a/editor/plugins/multimesh_editor_plugin.cpp
+++ b/editor/plugins/multimesh_editor_plugin.cpp
@@ -48,7 +48,7 @@ void MultiMeshEditor::_populate() {
 
 	Ref<Mesh> mesh;
 
-	if (mesh_source->get_text() == "") {
+	if (mesh_source->get_text().is_empty()) {
 		Ref<MultiMesh> multimesh;
 		multimesh = node->get_multimesh();
 		if (multimesh.is_null()) {
@@ -89,7 +89,7 @@ void MultiMeshEditor::_populate() {
 		}
 	}
 
-	if (surface_source->get_text() == "") {
+	if (surface_source->get_text().is_empty()) {
 		err_dialog->set_text(TTR("No surface source specified."));
 		err_dialog->popup_centered();
 		return;
diff --git a/editor/plugins/node_3d_editor_plugin.cpp b/editor/plugins/node_3d_editor_plugin.cpp
index 2f14447bf9..f49b749046 100644
--- a/editor/plugins/node_3d_editor_plugin.cpp
+++ b/editor/plugins/node_3d_editor_plugin.cpp
@@ -4080,7 +4080,7 @@ bool Node3DEditorViewport::_create_instance(Node *parent, String &path, const Po
 		return false;
 	}
 
-	if (editor->get_edited_scene()->get_scene_file_path() != "") { // cyclical instancing
+	if (!editor->get_edited_scene()->get_scene_file_path().is_empty()) { // cyclical instancing
 		if (_cyclical_dependency_exists(editor->get_edited_scene()->get_scene_file_path(), instantiated_scene)) {
 			memdelete(instantiated_scene);
 			return false;
diff --git a/editor/plugins/occluder_instance_3d_editor_plugin.cpp b/editor/plugins/occluder_instance_3d_editor_plugin.cpp
index 0328b1bea6..1e85b19a84 100644
--- a/editor/plugins/occluder_instance_3d_editor_plugin.cpp
+++ b/editor/plugins/occluder_instance_3d_editor_plugin.cpp
@@ -42,10 +42,10 @@ void OccluderInstance3DEditorPlugin::_bake_select_file(const String &p_file) {
 		switch (err) {
 			case OccluderInstance3D::BAKE_ERROR_NO_SAVE_PATH: {
 				String scene_path = occluder_instance->get_scene_file_path();
-				if (scene_path == String()) {
+				if (scene_path.is_empty()) {
 					scene_path = occluder_instance->get_owner()->get_scene_file_path();
 				}
-				if (scene_path == String()) {
+				if (scene_path.is_empty()) {
 					EditorNode::get_singleton()->show_warning(TTR("Can't determine a save path for the occluder.\nSave your scene and try again."));
 					break;
 				}
diff --git a/editor/plugins/polygon_2d_editor_plugin.cpp b/editor/plugins/polygon_2d_editor_plugin.cpp
index 79cfcbec64..affcab9e7d 100644
--- a/editor/plugins/polygon_2d_editor_plugin.cpp
+++ b/editor/plugins/polygon_2d_editor_plugin.cpp
@@ -170,7 +170,7 @@ void Polygon2DEditor::_update_bone_list() {
 		if (np.get_name_count()) {
 			name = np.get_name(np.get_name_count() - 1);
 		}
-		if (name == String()) {
+		if (name.is_empty()) {
 			name = "Bone " + itos(i);
 		}
 		cb->set_text(name);
diff --git a/editor/plugins/resource_preloader_editor_plugin.cpp b/editor/plugins/resource_preloader_editor_plugin.cpp
index eae6916a92..30b7a26aab 100644
--- a/editor/plugins/resource_preloader_editor_plugin.cpp
+++ b/editor/plugins/resource_preloader_editor_plugin.cpp
@@ -110,7 +110,7 @@ void ResourcePreloaderEditor::_item_edited() {
 			return;
 		}
 
-		if (new_name == "" || new_name.find("\\") != -1 || new_name.find("/") != -1 || preloader->has_resource(new_name)) {
+		if (new_name.is_empty() || new_name.find("\\") != -1 || new_name.find("/") != -1 || preloader->has_resource(new_name)) {
 			s->set_text(0, old_name);
 			return;
 		}
@@ -147,10 +147,10 @@ void ResourcePreloaderEditor::_paste_pressed() {
 	}
 
 	String name = r->get_name();
-	if (name == "") {
+	if (name.is_empty()) {
 		name = r->get_path().get_file();
 	}
-	if (name == "") {
+	if (name.is_empty()) {
 		name = r->get_class();
 	}
 
@@ -300,7 +300,7 @@ void ResourcePreloaderEditor::drop_data_fw(const Point2 &p_point, const Variant
 
 		if (r.is_valid()) {
 			String basename;
-			if (r->get_name() != "") {
+			if (!r->get_name().is_empty()) {
 				basename = r->get_name();
 			} else if (r->get_path().is_resource_file()) {
 				basename = r->get_path().get_basename();
diff --git a/editor/plugins/root_motion_editor_plugin.cpp b/editor/plugins/root_motion_editor_plugin.cpp
index 0f3c50a861..d1830bf5af 100644
--- a/editor/plugins/root_motion_editor_plugin.cpp
+++ b/editor/plugins/root_motion_editor_plugin.cpp
@@ -89,7 +89,7 @@ void EditorPropertyRootMotion::_node_assign() {
 		String accum;
 		for (int i = 0; i < path.get_name_count(); i++) {
 			String name = path.get_name(i);
-			if (accum != String()) {
+			if (!accum.is_empty()) {
 				accum += "/";
 			}
 			accum += name;
@@ -277,7 +277,7 @@ bool EditorInspectorRootMotionPlugin::can_handle(Object *p_object) {
 bool EditorInspectorRootMotionPlugin::parse_property(Object *p_object, const Variant::Type p_type, const String &p_path, const PropertyHint p_hint, const String &p_hint_text, const uint32_t p_usage, const bool p_wide) {
 	if (p_path == "root_motion_track" && p_object->is_class("AnimationTree") && p_type == Variant::NODE_PATH) {
 		EditorPropertyRootMotion *editor = memnew(EditorPropertyRootMotion);
-		if (p_hint == PROPERTY_HINT_NODE_PATH_TO_EDITED_NODE && p_hint_text != String()) {
+		if (p_hint == PROPERTY_HINT_NODE_PATH_TO_EDITED_NODE && !p_hint_text.is_empty()) {
 			editor->setup(p_hint_text);
 		}
 		add_property_editor(p_path, editor);
diff --git a/editor/plugins/script_editor_plugin.cpp b/editor/plugins/script_editor_plugin.cpp
index 5dbcb3788d..caaac2c7d3 100644
--- a/editor/plugins/script_editor_plugin.cpp
+++ b/editor/plugins/script_editor_plugin.cpp
@@ -179,7 +179,7 @@ void EditorStandardSyntaxHighlighter::_update_cache() {
 		for (const String &comment : comments) {
 			String beg = comment.get_slice(" ", 0);
 			String end = comment.get_slice_count(" ") > 1 ? comment.get_slice(" ", 1) : String();
-			highlighter->add_color_region(beg, end, comment_color, end == "");
+			highlighter->add_color_region(beg, end, comment_color, end.is_empty());
 		}
 
 		/* Strings */
@@ -189,7 +189,7 @@ void EditorStandardSyntaxHighlighter::_update_cache() {
 		for (const String &string : strings) {
 			String beg = string.get_slice(" ", 0);
 			String end = string.get_slice_count(" ") > 1 ? string.get_slice(" ", 1) : String();
-			highlighter->add_color_region(beg, end, string_color, end == "");
+			highlighter->add_color_region(beg, end, string_color, end.is_empty());
 		}
 	}
 }
@@ -321,7 +321,7 @@ void ScriptEditorQuickOpen::_update_search() {
 
 	for (int i = 0; i < functions.size(); i++) {
 		String file = functions[i];
-		if ((search_box->get_text() == "" || file.findn(search_box->get_text()) != -1)) {
+		if ((search_box->get_text().is_empty() || file.findn(search_box->get_text()) != -1)) {
 			TreeItem *ti = search_options->create_item(root);
 			ti->set_text(0, file);
 			if (root->get_first_child() == ti) {
@@ -392,7 +392,7 @@ ScriptEditor *ScriptEditor::script_editor = nullptr;
 
 String ScriptEditor::_get_debug_tooltip(const String &p_text, Node *_se) {
 	String val = EditorDebuggerNode::get_singleton()->get_var_value(p_text);
-	if (val != String()) {
+	if (!val.is_empty()) {
 		return p_text + ": " + val;
 	} else {
 		return String();
@@ -1679,7 +1679,7 @@ void ScriptEditor::get_breakpoints(List<String> *p_breakpoints) {
 
 		String base = script->get_path();
 		loaded_scripts.insert(base);
-		if (base.begins_with("local://") || base == "") {
+		if (base.begins_with("local://") || base.is_empty()) {
 			continue;
 		}
 
@@ -1831,7 +1831,7 @@ void ScriptEditor::_update_members_overview() {
 	for (int i = 0; i < functions.size(); i++) {
 		String filter = filter_methods->get_text();
 		String name = functions[i].get_slice(":", 0);
-		if (filter == "" || filter.is_subsequence_ofi(name)) {
+		if (filter.is_empty() || filter.is_subsequence_ofi(name)) {
 			members_overview->add_item(name);
 			members_overview->set_item_metadata(members_overview->get_item_count() - 1, functions[i].get_slice(":", 1).to_int() - 1);
 		}
@@ -2076,7 +2076,7 @@ void ScriptEditor::_update_script_names() {
 	Vector<_ScriptEditorItemData> sedata_filtered;
 	for (int i = 0; i < sedata.size(); i++) {
 		String filter = filter_scripts->get_text();
-		if (filter == "" || filter.is_subsequence_ofi(sedata[i].name)) {
+		if (filter.is_empty() || filter.is_subsequence_ofi(sedata[i].name)) {
 			sedata_filtered.push_back(sedata[i]);
 		}
 	}
@@ -2648,7 +2648,7 @@ void ScriptEditor::_editor_settings_changed() {
 
 	_update_autosave_timer();
 
-	if (current_theme == "") {
+	if (current_theme.is_empty()) {
 		current_theme = EditorSettings::get_singleton()->get("text_editor/theme/color_theme");
 	} else if (current_theme != String(EditorSettings::get_singleton()->get("text_editor/theme/color_theme"))) {
 		current_theme = EditorSettings::get_singleton()->get("text_editor/theme/color_theme");
@@ -2840,7 +2840,7 @@ bool ScriptEditor::can_drop_data_fw(const Point2 &p_point, const Variant &p_data
 
 		for (int i = 0; i < files.size(); i++) {
 			String file = files[i];
-			if (file == "" || !FileAccess::exists(file)) {
+			if (file.is_empty() || !FileAccess::exists(file)) {
 				continue;
 			}
 			if (ResourceLoader::exists(file, "Script")) {
@@ -2920,7 +2920,7 @@ void ScriptEditor::drop_data_fw(const Point2 &p_point, const Variant &p_data, Co
 		int num_tabs_before = tab_container->get_child_count();
 		for (int i = 0; i < files.size(); i++) {
 			String file = files[i];
-			if (file == "" || !FileAccess::exists(file)) {
+			if (file.is_empty() || !FileAccess::exists(file)) {
 				continue;
 			}
 
@@ -3126,7 +3126,7 @@ void ScriptEditor::set_window_layout(Ref<ConfigFile> p_layout) {
 
 	for (int i = 0; i < helps.size(); i++) {
 		String path = helps[i];
-		if (path == "") { // invalid, skip
+		if (path.is_empty()) { // invalid, skip
 			continue;
 		}
 		_help_class_open(path);
@@ -3197,7 +3197,7 @@ void ScriptEditor::get_window_layout(Ref<ConfigFile> p_layout) {
 }
 
 void ScriptEditor::_help_class_open(const String &p_class) {
-	if (p_class == "") {
+	if (p_class.is_empty()) {
 		return;
 	}
 
diff --git a/editor/plugins/script_text_editor.cpp b/editor/plugins/script_text_editor.cpp
index 36bab83630..d5af7c5b38 100644
--- a/editor/plugins/script_text_editor.cpp
+++ b/editor/plugins/script_text_editor.cpp
@@ -205,7 +205,7 @@ void ScriptTextEditor::_set_theme_for_script() {
 		String beg = string.get_slice(" ", 0);
 		String end = string.get_slice_count(" ") > 1 ? string.get_slice(" ", 1) : String();
 		if (!text_edit->has_string_delimiter(beg)) {
-			text_edit->add_string_delimiter(beg, end, end == "");
+			text_edit->add_string_delimiter(beg, end, end.is_empty());
 		}
 
 		if (!end.is_empty() && !text_edit->has_auto_brace_completion_open_key(beg)) {
@@ -219,7 +219,7 @@ void ScriptTextEditor::_set_theme_for_script() {
 	for (const String &comment : comments) {
 		String beg = comment.get_slice(" ", 0);
 		String end = comment.get_slice_count(" ") > 1 ? comment.get_slice(" ", 1) : String();
-		text_edit->add_comment_delimiter(beg, end, end == "");
+		text_edit->add_comment_delimiter(beg, end, end.is_empty());
 
 		if (!end.is_empty() && !text_edit->has_auto_brace_completion_open_key(beg)) {
 			text_edit->add_auto_brace_completion_pair(beg, end);
@@ -381,7 +381,7 @@ String ScriptTextEditor::get_name() {
 		name = TTR("[unsaved]");
 	} else if (script->is_built_in()) {
 		const String &script_name = script->get_name();
-		if (script_name != "") {
+		if (!script_name.is_empty()) {
 			// If the built-in script has a custom resource name defined,
 			// display the built-in script name as follows: `ResourceName (scene_file.tscn)`
 			name = vformat("%s (%s)", script_name, name.get_slice("::", 0));
@@ -990,7 +990,7 @@ void ScriptTextEditor::_gutter_clicked(int p_line, int p_gutter) {
 	}
 
 	String method = code_editor->get_text_editor()->get_line_gutter_metadata(p_line, p_gutter);
-	if (method == "") {
+	if (method.is_empty()) {
 		return;
 	}
 
@@ -1137,7 +1137,7 @@ void ScriptTextEditor::_edit_option(int p_op) {
 
 				if (expression.parse(line) == OK) {
 					Variant result = expression.execute(Array(), Variant(), false);
-					if (expression.get_error_text() == "") {
+					if (expression.get_error_text().is_empty()) {
 						results.push_back(whitespace + result.get_construct_string());
 					} else {
 						results.push_back(line);
@@ -1263,19 +1263,19 @@ void ScriptTextEditor::_edit_option(int p_op) {
 		} break;
 		case HELP_CONTEXTUAL: {
 			String text = tx->get_selected_text();
-			if (text == "") {
+			if (text.is_empty()) {
 				text = tx->get_word_under_caret();
 			}
-			if (text != "") {
+			if (!text.is_empty()) {
 				emit_signal(SNAME("request_help"), text);
 			}
 		} break;
 		case LOOKUP_SYMBOL: {
 			String text = tx->get_word_under_caret();
-			if (text == "") {
+			if (text.is_empty()) {
 				text = tx->get_selected_text();
 			}
-			if (text != "") {
+			if (!text.is_empty()) {
 				_lookup_symbol(text, tx->get_caret_line(), tx->get_caret_column());
 			}
 		} break;
@@ -1560,10 +1560,10 @@ void ScriptTextEditor::_text_edit_gui_input(const Ref<InputEvent> &ev) {
 		}
 
 		String word_at_pos = tx->get_word_at_pos(local_pos);
-		if (word_at_pos == "") {
+		if (word_at_pos.is_empty()) {
 			word_at_pos = tx->get_word_under_caret();
 		}
-		if (word_at_pos == "") {
+		if (word_at_pos.is_empty()) {
 			word_at_pos = tx->get_selected_text();
 		}
 
diff --git a/editor/plugins/shader_file_editor_plugin.cpp b/editor/plugins/shader_file_editor_plugin.cpp
index 1e62261244..517de1901f 100644
--- a/editor/plugins/shader_file_editor_plugin.cpp
+++ b/editor/plugins/shader_file_editor_plugin.cpp
@@ -97,7 +97,7 @@ void ShaderFileEditor::_version_selected(int p_option) {
 
 	error_text->push_font(get_theme_font(SNAME("source"), SNAME("EditorFonts")));
 
-	if (error == String()) {
+	if (error.is_empty()) {
 		error_text->add_text(TTR("Shader stage compiled without errors."));
 	} else {
 		error_text->add_text(error);
@@ -107,7 +107,7 @@ void ShaderFileEditor::_version_selected(int p_option) {
 void ShaderFileEditor::_update_options() {
 	ERR_FAIL_COND(shader_file.is_null());
 
-	if (shader_file->get_base_error() != String()) {
+	if (!shader_file->get_base_error().is_empty()) {
 		stage_hb->hide();
 		versions->hide();
 		error_text->clear();
@@ -136,7 +136,7 @@ void ShaderFileEditor::_update_options() {
 
 	for (int i = 0; i < version_list.size(); i++) {
 		String title = version_list[i];
-		if (title == "") {
+		if (title.is_empty()) {
 			title = "default";
 		}
 
@@ -148,7 +148,7 @@ void ShaderFileEditor::_update_options() {
 		bool failed = false;
 		for (int j = 0; j < RD::SHADER_STAGE_MAX; j++) {
 			String error = bytecode->get_stage_compile_error(RD::ShaderStage(j));
-			if (error != String()) {
+			if (!error.is_empty()) {
 				failed = true;
 			}
 		}
@@ -182,7 +182,7 @@ void ShaderFileEditor::_update_options() {
 	for (int i = 0; i < RD::SHADER_STAGE_MAX; i++) {
 		Vector<uint8_t> bc = bytecode->get_stage_bytecode(RD::ShaderStage(i));
 		String error = bytecode->get_stage_compile_error(RD::ShaderStage(i));
-		bool disable = error == String() && bc.is_empty();
+		bool disable = error.is_empty() && bc.is_empty();
 		stages[i]->set_disabled(disable);
 		if (!disable) {
 			if (stages[i]->is_pressed()) {
diff --git a/editor/plugins/text_editor.cpp b/editor/plugins/text_editor.cpp
index ceb2c8394d..cbde382d67 100644
--- a/editor/plugins/text_editor.cpp
+++ b/editor/plugins/text_editor.cpp
@@ -71,7 +71,7 @@ String TextEditor::get_name() {
 		name = TTR("[unsaved]");
 	} else if (text_file->is_built_in()) {
 		const String &text_file_name = text_file->get_name();
-		if (text_file_name != "") {
+		if (!text_file_name.is_empty()) {
 			// If the built-in text_file has a custom resource name defined,
 			// display the built-in text_file name as follows: `ResourceName (scene_file.tscn)`
 			name = vformat("%s (%s)", text_file_name, name.get_slice("::", 0));
diff --git a/editor/plugins/version_control_editor_plugin.cpp b/editor/plugins/version_control_editor_plugin.cpp
index 5336788d98..eea0d2789d 100644
--- a/editor/plugins/version_control_editor_plugin.cpp
+++ b/editor/plugins/version_control_editor_plugin.cpp
@@ -266,7 +266,7 @@ void VersionControlEditorPlugin::_display_file_diff(String p_file_path) {
 
 void VersionControlEditorPlugin::_refresh_file_diff() {
 	String open_file = diff_file_name->get_text();
-	if (open_file != "") {
+	if (!open_file.is_empty()) {
 		_display_file_diff(diff_file_name->get_text());
 	}
 }
@@ -299,7 +299,7 @@ void VersionControlEditorPlugin::_update_commit_status() {
 }
 
 void VersionControlEditorPlugin::_update_commit_button() {
-	commit_button->set_disabled(commit_message->get_text().strip_edges() == "");
+	commit_button->set_disabled(commit_message->get_text().strip_edges().is_empty());
 }
 
 void VersionControlEditorPlugin::_commit_message_gui_input(const Ref<InputEvent> &p_event) {
diff --git a/editor/plugins/visual_shader_editor_plugin.cpp b/editor/plugins/visual_shader_editor_plugin.cpp
index 7673c31d00..365cfd9232 100644
--- a/editor/plugins/visual_shader_editor_plugin.cpp
+++ b/editor/plugins/visual_shader_editor_plugin.cpp
@@ -591,7 +591,7 @@ void VisualShaderGraphPlugin::add_node(VisualShader::Type p_type, int p_id) {
 
 		if (vsnode->is_use_prop_slots()) {
 			String error = vsnode->get_warning(visual_shader->get_mode(), p_type);
-			if (error != String()) {
+			if (!error.is_empty()) {
 				Label *error_label = memnew(Label);
 				error_label->add_theme_color_override("font_color", VisualShaderEditor::get_singleton()->get_theme_color(SNAME("error_color"), SNAME("Editor")));
 				error_label->set_text(error);
@@ -877,7 +877,7 @@ void VisualShaderGraphPlugin::add_node(VisualShader::Type p_type, int p_id) {
 	node->add_child(offset);
 
 	String error = vsnode->get_warning(visual_shader->get_mode(), p_type);
-	if (error != String()) {
+	if (!error.is_empty()) {
 		Label *error_label = memnew(Label);
 		error_label->add_theme_color_override("font_color", VisualShaderEditor::get_singleton()->get_theme_color(SNAME("error_color"), SNAME("Editor")));
 		error_label->set_text(error);
@@ -1191,7 +1191,7 @@ void VisualShaderEditor::update_custom_nodes() {
 			category = category.rstrip("/");
 			category = category.lstrip("/");
 			category = "Addons/" + category;
-			if (subcategory != "") {
+			if (!subcategory.is_empty()) {
 				category += "/" + subcategory;
 			}
 
@@ -1687,7 +1687,7 @@ void VisualShaderEditor::_change_input_port_name(const String &p_text, Object *p
 	ERR_FAIL_COND(!line_edit);
 
 	String validated_name = visual_shader->validate_port_name(p_text, node.ptr(), p_port_id, false);
-	if (validated_name == String() || prev_name == validated_name) {
+	if (validated_name.is_empty() || prev_name == validated_name) {
 		line_edit->set_text(node->get_input_port_name(p_port_id));
 		return;
 	}
@@ -1715,7 +1715,7 @@ void VisualShaderEditor::_change_output_port_name(const String &p_text, Object *
 	ERR_FAIL_COND(!line_edit);
 
 	String validated_name = visual_shader->validate_port_name(p_text, node.ptr(), p_port_id, true);
-	if (validated_name == String() || prev_name == validated_name) {
+	if (validated_name.is_empty() || prev_name == validated_name) {
 		line_edit->set_text(node->get_output_port_name(p_port_id));
 		return;
 	}
@@ -2410,7 +2410,7 @@ void VisualShaderEditor::_add_node(int p_idx, int p_op_idx, String p_resource_pa
 
 	bool is_custom = add_options[p_idx].is_custom;
 
-	if (!is_custom && add_options[p_idx].type != String()) {
+	if (!is_custom && !add_options[p_idx].type.is_empty()) {
 		VisualShaderNode *vsn = Object::cast_to<VisualShaderNode>(ClassDB::instantiate(add_options[p_idx].type));
 		ERR_FAIL_COND(!vsn);
 
diff --git a/editor/plugins/voxel_gi_editor_plugin.cpp b/editor/plugins/voxel_gi_editor_plugin.cpp
index 4f3cb9e189..4e81fc4e77 100644
--- a/editor/plugins/voxel_gi_editor_plugin.cpp
+++ b/editor/plugins/voxel_gi_editor_plugin.cpp
@@ -34,7 +34,7 @@ void VoxelGIEditorPlugin::_bake() {
 	if (voxel_gi) {
 		if (voxel_gi->get_probe_data().is_null()) {
 			String path = get_tree()->get_edited_scene_root()->get_scene_file_path();
-			if (path == String()) {
+			if (path.is_empty()) {
 				path = "res://" + voxel_gi->get_name() + "_data.res";
 			} else {
 				String ext = path.get_extension();
diff --git a/editor/project_export.cpp b/editor/project_export.cpp
index 20990cc301..0b748c12b6 100644
--- a/editor/project_export.cpp
+++ b/editor/project_export.cpp
@@ -178,7 +178,7 @@ void ProjectExportDialog::_update_export_all() {
 		Ref<EditorExportPreset> preset = EditorExport::get_singleton()->get_export_preset(i);
 		bool needs_templates;
 		String error;
-		if (preset->get_export_path() == "" || !preset->get_platform()->can_export(preset, error, needs_templates)) {
+		if (preset->get_export_path().is_empty() || !preset->get_platform()->can_export(preset, error, needs_templates)) {
 			can_export = false;
 			break;
 		}
@@ -244,7 +244,7 @@ void ProjectExportDialog::_edit_preset(int p_index) {
 	bool needs_templates;
 	String error;
 	if (!current->get_platform()->can_export(current, error, needs_templates)) {
-		if (error != String()) {
+		if (!error.is_empty()) {
 			Vector<String> items = error.split("\n", false);
 			error = "";
 			for (int i = 0; i < items.size(); i++) {
@@ -336,7 +336,7 @@ void ProjectExportDialog::_update_feature_list() {
 	Vector<String> custom_list = custom.split(",");
 	for (int i = 0; i < custom_list.size(); i++) {
 		String f = custom_list[i].strip_edges();
-		if (f != String()) {
+		if (!f.is_empty()) {
 			features.push_back(f);
 		}
 	}
@@ -871,7 +871,7 @@ void ProjectExportDialog::_open_export_template_manager() {
 
 void ProjectExportDialog::_validate_export_path(const String &p_path) {
 	// Disable export via OK button or Enter key if LineEdit has an empty filename
-	bool invalid_path = (p_path.get_file().get_basename() == "");
+	bool invalid_path = (p_path.get_file().get_basename().is_empty());
 
 	// Check if state change before needlessly messing with signals
 	if (invalid_path && export_project->get_ok_button()->is_disabled()) {
@@ -904,7 +904,7 @@ void ProjectExportDialog::_export_project() {
 		export_project->add_filter("*." + extension_list[i] + " ; " + platform->get_name() + " Export");
 	}
 
-	if (current->get_export_path() != "") {
+	if (!current->get_export_path().is_empty()) {
 		export_project->set_current_path(current->get_export_path());
 	} else {
 		if (extension_list.size() >= 1) {
@@ -1292,10 +1292,10 @@ ProjectExportDialog::ProjectExportDialog() {
 
 	default_filename = EditorSettings::get_singleton()->get_project_metadata("export_options", "default_filename", "");
 	// If no default set, use project name
-	if (default_filename == "") {
+	if (default_filename.is_empty()) {
 		// If no project name defined, use a sane default
 		default_filename = ProjectSettings::get_singleton()->get("application/config/name");
-		if (default_filename == "") {
+		if (default_filename.is_empty()) {
 			default_filename = "UnnamedProject";
 		}
 	}
diff --git a/editor/project_manager.cpp b/editor/project_manager.cpp
index e6964a8337..134f238bb6 100644
--- a/editor/project_manager.cpp
+++ b/editor/project_manager.cpp
@@ -161,7 +161,7 @@ private:
 			}
 		}
 
-		if (valid_path == "") {
+		if (valid_path.is_empty()) {
 			set_message(TTR("The path specified doesn't exist."), MESSAGE_ERROR);
 			memdelete(d);
 			get_ok_button()->set_disabled(true);
@@ -175,7 +175,7 @@ private:
 				valid_install_path = install_path->get_text().strip_edges();
 			}
 
-			if (valid_install_path == "") {
+			if (valid_install_path.is_empty()) {
 				set_message(TTR("The path specified doesn't exist."), MESSAGE_ERROR, INSTALL_PATH);
 				memdelete(d);
 				get_ok_button()->set_disabled(true);
@@ -184,7 +184,7 @@ private:
 		}
 
 		if (mode == MODE_IMPORT || mode == MODE_RENAME) {
-			if (valid_path != "" && !d->file_exists("project.godot")) {
+			if (!valid_path.is_empty() && !d->file_exists("project.godot")) {
 				if (valid_path.ends_with(".zip")) {
 					FileAccess *src_f = nullptr;
 					zlib_filefunc_def io = zipio_create_io_from_file(&src_f);
@@ -225,7 +225,7 @@ private:
 					d->list_dir_begin();
 					is_folder_empty = true;
 					String n = d->get_next();
-					while (n != String()) {
+					while (!n.is_empty()) {
 						if (!n.begins_with(".")) {
 							// Allow `.`, `..` (reserved current/parent folder names)
 							// and hidden files/folders to be present.
@@ -265,7 +265,7 @@ private:
 			d->list_dir_begin();
 			is_folder_empty = true;
 			String n = d->get_next();
-			while (n != String()) {
+			while (!n.is_empty()) {
 				if (!n.begins_with(".")) {
 					// Allow `.`, `..` (reserved current/parent folder names)
 					// and hidden files/folders to be present.
@@ -295,16 +295,16 @@ private:
 
 	void _path_text_changed(const String &p_path) {
 		String sp = _test_path();
-		if (sp != "") {
+		if (!sp.is_empty()) {
 			// If the project name is empty or default, infer the project name from the selected folder name
-			if (project_name->get_text().strip_edges() == "" || project_name->get_text().strip_edges() == TTR("New Game Project")) {
+			if (project_name->get_text().strip_edges().is_empty() || project_name->get_text().strip_edges() == TTR("New Game Project")) {
 				sp = sp.replace("\\", "/");
 				int lidx = sp.rfind("/");
 
 				if (lidx != -1) {
 					sp = sp.substr(lidx + 1, sp.length()).capitalize();
 				}
-				if (sp == "" && mode == MODE_IMPORT) {
+				if (sp.is_empty() && mode == MODE_IMPORT) {
 					sp = TTR("Imported Project");
 				}
 
@@ -313,7 +313,7 @@ private:
 			}
 		}
 
-		if (created_folder_path != "" && created_folder_path != p_path) {
+		if (!created_folder_path.is_empty() && created_folder_path != p_path) {
 			_remove_created_folder();
 		}
 	}
@@ -382,7 +382,7 @@ private:
 
 	void _create_folder() {
 		const String project_name_no_edges = project_name->get_text().strip_edges();
-		if (project_name_no_edges == "" || created_folder_path != "" || project_name_no_edges.ends_with(".")) {
+		if (project_name_no_edges.is_empty() || !created_folder_path.is_empty() || project_name_no_edges.ends_with(".")) {
 			set_message(TTR("Invalid project name."), MESSAGE_WARNING);
 			return;
 		}
@@ -417,7 +417,7 @@ private:
 
 		_test_path();
 
-		if (p_text.strip_edges() == "") {
+		if (p_text.strip_edges().is_empty()) {
 			set_message(TTR("It would be a good idea to name your project."), MESSAGE_ERROR);
 		}
 	}
@@ -432,7 +432,7 @@ private:
 
 		if (mode == MODE_RENAME) {
 			String dir2 = _test_path();
-			if (dir2 == "") {
+			if (dir2.is_empty()) {
 				set_message(TTR("Invalid project path (changed anything?)."), MESSAGE_ERROR);
 				return;
 			}
@@ -546,7 +546,7 @@ private:
 
 						String path = fname;
 
-						if (path == String() || path == zip_root || !zip_root.is_subsequence_of(path)) {
+						if (path.is_empty() || path == zip_root || !zip_root.is_subsequence_of(path)) {
 							//
 						} else if (path.ends_with("/")) { // a dir
 
@@ -617,7 +617,7 @@ private:
 	}
 
 	void _remove_created_folder() {
-		if (created_folder_path != "") {
+		if (!created_folder_path.is_empty()) {
 			DirAccess *d = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
 			d->remove(created_folder_path);
 			memdelete(d);
@@ -717,7 +717,7 @@ public:
 
 		} else {
 			fav_dir = EditorSettings::get_singleton()->get("filesystem/directories/default_project_path");
-			if (fav_dir != "") {
+			if (!fav_dir.is_empty()) {
 				project_path->set_text(fav_dir);
 				fdialog->set_current_dir(fav_dir);
 			} else {
@@ -1158,7 +1158,7 @@ void ProjectList::load_project_icon(int p_index) {
 
 	Ref<Texture2D> default_icon = get_theme_icon(SNAME("DefaultProjectIcon"), SNAME("EditorIcons"));
 	Ref<Texture2D> icon;
-	if (item.icon != "") {
+	if (!item.icon.is_empty()) {
 		Ref<Image> img;
 		img.instantiate();
 		Error err = img->load(item.icon.replace_first("res://", item.path + "/"));
@@ -1191,7 +1191,7 @@ ProjectList::Item ProjectList::load_project_data(const String &p_property_key, b
 	String project_name = TTR("Unnamed Project");
 	if (cf_err == OK) {
 		String cf_project_name = static_cast<String>(cf->get_value("application", "config/name", ""));
-		if (cf_project_name != "") {
+		if (!cf_project_name.is_empty()) {
 			project_name = cf_project_name.xml_unescape();
 		}
 		config_version = (int)cf->get_value("", "config_version", 0);
@@ -1473,7 +1473,7 @@ void ProjectList::sort_projects() {
 		Item &item = _projects.write[i];
 
 		bool visible = true;
-		if (_search_term != "") {
+		if (!_search_term.is_empty()) {
 			String search_path;
 			if (_search_term.find("/") != -1) {
 				// Search path will match the whole path
@@ -1785,7 +1785,7 @@ void ProjectList::_panel_input(const Ref<InputEvent> &p_ev, Node *p_hb) {
 	const Item &clicked_project = _projects[clicked_index];
 
 	if (mb.is_valid() && mb->is_pressed() && mb->get_button_index() == MouseButton::LEFT) {
-		if (mb->is_shift_pressed() && _selected_project_keys.size() > 0 && _last_clicked != "" && clicked_project.project_key != _last_clicked) {
+		if (mb->is_shift_pressed() && _selected_project_keys.size() > 0 && !_last_clicked.is_empty() && clicked_project.project_key != _last_clicked) {
 			int anchor_index = -1;
 			for (int i = 0; i < _projects.size(); ++i) {
 				const Item &p = _projects[i];
@@ -2193,7 +2193,7 @@ void ProjectManager::_run_project_confirm() {
 
 	for (int i = 0; i < selected_list.size(); ++i) {
 		const String &selected_main = selected_list[i].main_scene;
-		if (selected_main == "") {
+		if (selected_main.is_empty()) {
 			run_error_diag->set_text(TTR("Can't run project: no main scene defined.\nPlease edit the project and set the main scene in the Project Settings under the \"Application\" category."));
 			run_error_diag->popup_centered();
 			continue;
@@ -2246,7 +2246,7 @@ void ProjectManager::_scan_dir(const String &path, List<String> *r_projects) {
 	ERR_FAIL_COND_MSG(error != OK, "Could not scan directory at: " + path);
 	da->list_dir_begin();
 	String n = da->get_next();
-	while (n != String()) {
+	while (!n.is_empty()) {
 		if (da->current_is_dir() && !n.begins_with(".")) {
 			_scan_dir(da->get_current_dir().plus_file(n), r_projects);
 		} else if (n == "project.godot") {
@@ -2388,7 +2388,7 @@ void ProjectManager::_files_dropped(PackedStringArray p_files, int p_screen) {
 			if (dir->change_dir(folders[0]) == OK) {
 				dir->list_dir_begin();
 				String file = dir->get_next();
-				while (confirm && file != String()) {
+				while (confirm && !file.is_empty()) {
 					if (!dir->current_is_dir() && file.ends_with("project.godot")) {
 						confirm = false;
 					}
@@ -2826,7 +2826,7 @@ ProjectManager::ProjectManager() {
 	}
 
 	String autoscan_path = EditorSettings::get_singleton()->get("filesystem/directories/autoscan_project_path");
-	if (autoscan_path != "") {
+	if (!autoscan_path.is_empty()) {
 		if (dir_access->dir_exists(autoscan_path)) {
 			_scan_begin(autoscan_path);
 		} else {
diff --git a/editor/project_settings_editor.cpp b/editor/project_settings_editor.cpp
index 519427787d..f6975594cb 100644
--- a/editor/project_settings_editor.cpp
+++ b/editor/project_settings_editor.cpp
@@ -78,7 +78,7 @@ void ProjectSettingsEditor::_advanced_toggled(bool p_button_pressed) {
 }
 
 void ProjectSettingsEditor::_setting_selected(const String &p_path) {
-	if (p_path == String()) {
+	if (p_path.is_empty()) {
 		return;
 	}
 
@@ -147,12 +147,12 @@ void ProjectSettingsEditor::_update_property_box() {
 	const Vector<String> t = setting.split(".", true, 1);
 	const String name = t[0];
 	const String feature = (t.size() == 2) ? t[1] : "";
-	bool feature_invalid = (t.size() == 2) && (t[1] == "");
+	bool feature_invalid = (t.size() == 2) && (t[1].is_empty());
 
 	add_button->set_disabled(true);
 	del_button->set_disabled(true);
 
-	if (feature != "") {
+	if (!feature.is_empty()) {
 		feature_invalid = true;
 		for (int i = 1; i < feature_box->get_item_count(); i++) {
 			if (feature == feature_box->get_item_text(i)) {
@@ -163,11 +163,11 @@ void ProjectSettingsEditor::_update_property_box() {
 		}
 	}
 
-	if (feature == "" || feature_invalid) {
+	if (feature.is_empty() || feature_invalid) {
 		feature_box->select(0);
 	}
 
-	if (property_box->get_text() == "") {
+	if (property_box->get_text().is_empty()) {
 		return;
 	}
 
@@ -244,7 +244,7 @@ void ProjectSettingsEditor::_add_feature_overrides() {
 		Vector<String> custom_list = custom.split(",");
 		for (int j = 0; j < custom_list.size(); j++) {
 			String f = custom_list[j].strip_edges();
-			if (f != String()) {
+			if (!f.is_empty()) {
 				presets.insert(f);
 			}
 		}
diff --git a/editor/property_editor.cpp b/editor/property_editor.cpp
index 01eae1e4ec..abe1bcf9e5 100644
--- a/editor/property_editor.cpp
+++ b/editor/property_editor.cpp
@@ -482,7 +482,7 @@ bool CustomPropertyEditor::edit(Object *p_owner, const String &p_name, Variant::
 				Vector<String> flags = hint_text.split(",");
 				for (int i = 0; i < flags.size(); i++) {
 					String flag = flags[i];
-					if (flag == "") {
+					if (flag.is_empty()) {
 						continue;
 					}
 					menu->add_check_item(flag, i);
@@ -552,7 +552,7 @@ bool CustomPropertyEditor::edit(Object *p_owner, const String &p_name, Variant::
 					add_child(create_dialog);
 				}
 
-				if (hint_text != String()) {
+				if (!hint_text.is_empty()) {
 					create_dialog->set_base_type(hint_text);
 				} else {
 					create_dialog->set_base_type("Object");
@@ -853,7 +853,7 @@ bool CustomPropertyEditor::edit(Object *p_owner, const String &p_name, Variant::
 			if (p_name == "script" && hint_text == "Script" && Object::cast_to<Node>(owner)) {
 				menu->add_item(TTR("New Script"), OBJ_MENU_NEW_SCRIPT);
 				menu->add_separator();
-			} else if (hint_text != "") {
+			} else if (!hint_text.is_empty()) {
 				int idx = 0;
 
 				Vector<EditorData::CustomType> custom_resources;
@@ -933,7 +933,7 @@ bool CustomPropertyEditor::edit(Object *p_owner, const String &p_name, Variant::
 			RES cb = EditorSettings::get_singleton()->get_resource_clipboard();
 			bool paste_valid = false;
 			if (cb.is_valid()) {
-				if (hint_text == "") {
+				if (hint_text.is_empty()) {
 					paste_valid = true;
 				} else {
 					for (int i = 0; i < hint_text.get_slice_count(","); i++) {
@@ -1108,7 +1108,7 @@ void CustomPropertyEditor::_node_path_selected(NodePath p_path) {
 		return;
 	}
 
-	if (hint == PROPERTY_HINT_NODE_PATH_TO_EDITED_NODE && hint_text != String()) {
+	if (hint == PROPERTY_HINT_NODE_PATH_TO_EDITED_NODE && !hint_text.is_empty()) {
 		Node *node = get_node(hint_text);
 		if (node) {
 			Node *tonode = node->get_node(p_path);
@@ -1191,7 +1191,7 @@ void CustomPropertyEditor::_action_pressed(int p_which) {
 
 					file->clear_filters();
 
-					if (hint_text != "") {
+					if (!hint_text.is_empty()) {
 						Vector<String> extensions = hint_text.split(",");
 						for (int i = 0; i < extensions.size(); i++) {
 							String filter = extensions[i];
diff --git a/editor/property_selector.cpp b/editor/property_selector.cpp
index 877b4552c1..838686ead6 100644
--- a/editor/property_selector.cpp
+++ b/editor/property_selector.cpp
@@ -181,7 +181,7 @@ void PropertySelector::_update_search() {
 				continue;
 			}
 
-			if (search_box->get_text() != String() && E.name.findn(search_text) == -1) {
+			if (!search_box->get_text().is_empty() && E.name.findn(search_text) == -1) {
 				continue;
 			}
 
@@ -194,7 +194,7 @@ void PropertySelector::_update_search() {
 			item->set_metadata(0, E.name);
 			item->set_icon(0, type_icons[E.type]);
 
-			if (!found && search_box->get_text() != String() && E.name.findn(search_text) != -1) {
+			if (!found && !search_box->get_text().is_empty() && E.name.findn(search_text) != -1) {
 				item->select(0);
 				found = true;
 			}
@@ -269,7 +269,7 @@ void PropertySelector::_update_search() {
 				continue;
 			}
 
-			if (search_box->get_text() != String() && name.findn(search_text) == -1) {
+			if (!search_box->get_text().is_empty() && name.findn(search_text) == -1) {
 				continue;
 			}
 
@@ -318,7 +318,7 @@ void PropertySelector::_update_search() {
 			item->set_metadata(0, name);
 			item->set_selectable(0, true);
 
-			if (!found && search_box->get_text() != String() && name.findn(search_text) != -1) {
+			if (!found && !search_box->get_text().is_empty() && name.findn(search_text) != -1) {
 				item->select(0);
 				found = true;
 			}
@@ -353,7 +353,7 @@ void PropertySelector::_item_selected() {
 	String class_type;
 	if (type != Variant::NIL) {
 		class_type = Variant::get_type_name(type);
-	} else if (base_type != String()) {
+	} else if (!base_type.is_empty()) {
 		class_type = base_type;
 	} else if (instance) {
 		class_type = instance->get_class();
@@ -362,7 +362,7 @@ void PropertySelector::_item_selected() {
 	DocTools *dd = EditorHelp::get_doc_data();
 	String text;
 	if (properties) {
-		while (class_type != String()) {
+		while (!class_type.is_empty()) {
 			Map<String, DocData::ClassDoc>::Element *E = dd->class_list.find(class_type);
 			if (E) {
 				for (int i = 0; i < E->get().properties.size(); i++) {
@@ -373,7 +373,7 @@ void PropertySelector::_item_selected() {
 				}
 			}
 
-			if (text != String()) {
+			if (!text.is_empty()) {
 				break;
 			}
 
@@ -381,7 +381,7 @@ void PropertySelector::_item_selected() {
 			class_type = ClassDB::get_parent_class(class_type);
 		}
 	} else {
-		while (class_type != String()) {
+		while (!class_type.is_empty()) {
 			Map<String, DocData::ClassDoc>::Element *E = dd->class_list.find(class_type);
 			if (E) {
 				for (int i = 0; i < E->get().methods.size(); i++) {
@@ -392,7 +392,7 @@ void PropertySelector::_item_selected() {
 				}
 			}
 
-			if (text != String()) {
+			if (!text.is_empty()) {
 				break;
 			}
 
@@ -401,7 +401,7 @@ void PropertySelector::_item_selected() {
 		}
 	}
 
-	if (text != String()) {
+	if (!text.is_empty()) {
 		// Display both property name and description, since the help bit may be displayed
 		// far away from the location (especially if the dialog was resized to be taller).
 		help_bit->set_text(vformat("[b]%s[/b]: %s", name, text));
diff --git a/editor/quick_open.cpp b/editor/quick_open.cpp
index 7868414d89..b4ab6493ef 100644
--- a/editor/quick_open.cpp
+++ b/editor/quick_open.cpp
@@ -79,7 +79,7 @@ void EditorQuickOpen::_build_search_cache(EditorFileSystemDirectory *p_efsd) {
 
 void EditorQuickOpen::_update_search() {
 	const String search_text = search_box->get_text();
-	const bool empty_search = search_text == "";
+	const bool empty_search = search_text.is_empty();
 
 	// Filter possible candidates.
 	Vector<Entry> entries;
diff --git a/editor/scene_tree_dock.cpp b/editor/scene_tree_dock.cpp
index b36275322a..1934850160 100644
--- a/editor/scene_tree_dock.cpp
+++ b/editor/scene_tree_dock.cpp
@@ -190,7 +190,7 @@ void SceneTreeDock::_perform_instantiate_scenes(const Vector<String> &p_files, N
 			break;
 		}
 
-		if (edited_scene->get_scene_file_path() != "") {
+		if (!edited_scene->get_scene_file_path().is_empty()) {
 			if (_cyclical_dependency_exists(edited_scene->get_scene_file_path(), instantiated_scene)) {
 				accept->set_text(vformat(TTR("Cannot instance the scene '%s' because the current scene exists within one of its nodes."), p_files[i]));
 				accept->popup_centered();
@@ -467,7 +467,7 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 			}
 
 			bool has_cycle = false;
-			if (edited_scene->get_scene_file_path() != String()) {
+			if (!edited_scene->get_scene_file_path().is_empty()) {
 				for (Node *E : node_clipboard) {
 					if (edited_scene->get_scene_file_path() == E->get_scene_file_path()) {
 						has_cycle = true;
@@ -810,7 +810,7 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 				return;
 			}
 
-			if (node->get_scene_file_path() != String()) {
+			if (!node->get_scene_file_path().is_empty()) {
 				accept->set_text(TTR("Instantiated scenes can't become root"));
 				accept->popup_centered();
 				return;
@@ -889,7 +889,7 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 					Node *node = remove_list[0];
 					if (node == editor_data->get_edited_scene_root()) {
 						msg = vformat(TTR("Delete the root node \"%s\"?"), node->get_name());
-					} else if (node->get_scene_file_path() == "" && node->get_child_count() > 0) {
+					} else if (node->get_scene_file_path().is_empty() && node->get_child_count() > 0) {
 						// Display this message only for non-instantiated scenes
 						msg = vformat(TTR("Delete node \"%s\" and its children?"), node->get_name());
 					} else {
@@ -936,7 +936,7 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 				break;
 			}
 
-			if (tocopy != editor_data->get_edited_scene_root() && tocopy->get_scene_file_path() != "") {
+			if (tocopy != editor_data->get_edited_scene_root() && !tocopy->get_scene_file_path().is_empty()) {
 				accept->set_text(TTR("Can't save the branch of an already instantiated scene.\nTo create a variation of a scene, you can make an inherited scene based on the instantiated scene using Scene > New Inherited Scene... instead."));
 				accept->popup_centered();
 				break;
@@ -1052,7 +1052,7 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 						break;
 					}
 
-					ERR_FAIL_COND(node->get_scene_file_path() == String());
+					ERR_FAIL_COND(node->get_scene_file_path().is_empty());
 					undo_redo->create_action(TTR("Make Local"));
 					undo_redo->add_do_method(node, "set_scene_file_path", "");
 					undo_redo->add_undo_method(node, "set_scene_file_path", node->get_scene_file_path());
@@ -1703,7 +1703,7 @@ bool SceneTreeDock::_validate_no_instance() {
 	List<Node *> selection = editor_selection->get_selected_node_list();
 
 	for (Node *E : selection) {
-		if (E != edited_scene && E->get_scene_file_path() != "") {
+		if (E != edited_scene && !E->get_scene_file_path().is_empty()) {
 			accept->set_text(TTR("This operation can't be done on instantiated scenes."));
 			accept->popup_centered();
 			return false;
@@ -2761,7 +2761,7 @@ void SceneTreeDock::_tree_rmb(const Vector2 &p_menu_pos) {
 
 		bool can_replace = true;
 		for (Node *E : selection) {
-			if (E != edited_scene && (E->get_owner() != edited_scene || E->get_scene_file_path() != "")) {
+			if (E != edited_scene && (E->get_owner() != edited_scene || !E->get_scene_file_path().is_empty())) {
 				can_replace = false;
 				break;
 			}
@@ -2793,7 +2793,7 @@ void SceneTreeDock::_tree_rmb(const Vector2 &p_menu_pos) {
 			menu->add_icon_shortcut(get_theme_icon(SNAME("CopyNodePath"), SNAME("EditorIcons")), ED_GET_SHORTCUT("scene_tree/copy_node_path"), TOOL_COPY_NODE_PATH);
 		}
 
-		bool is_external = (selection[0]->get_scene_file_path() != "");
+		bool is_external = (!selection[0]->get_scene_file_path().is_empty());
 		if (is_external) {
 			bool is_inherited = selection[0]->get_scene_inherited_state() != nullptr;
 			bool is_top_level = selection[0]->get_owner() == nullptr;
@@ -2906,9 +2906,9 @@ void SceneTreeDock::attach_script_to_selected(bool p_extend) {
 	Ref<Script> existing = selected->get_script();
 
 	String path = selected->get_scene_file_path();
-	if (path == "") {
+	if (path.is_empty()) {
 		String root_path = editor_data->get_edited_scene_root()->get_scene_file_path();
-		if (root_path == "") {
+		if (root_path.is_empty()) {
 			path = String("res://").plus_file(selected->get_name());
 		} else {
 			path = root_path.get_base_dir().plus_file(selected->get_name());
@@ -2956,7 +2956,7 @@ void SceneTreeDock::attach_shader_to_selected(int p_preferred_mode) {
 	}
 
 	String path = selected_shader_material->get_path();
-	if (path == "") {
+	if (path.is_empty()) {
 		String root_path;
 		if (editor_data->get_edited_scene_root()) {
 			root_path = editor_data->get_edited_scene_root()->get_scene_file_path();
@@ -2967,7 +2967,7 @@ void SceneTreeDock::attach_shader_to_selected(int p_preferred_mode) {
 		} else {
 			shader_name = selected_shader_material->get_name();
 		}
-		if (root_path == "") {
+		if (root_path.is_empty()) {
 			path = String("res://").plus_file(shader_name);
 		} else {
 			path = root_path.get_base_dir().plus_file(shader_name);
@@ -3070,7 +3070,7 @@ void SceneTreeDock::_update_create_root_dialog() {
 			while (!f->eof_reached()) {
 				String l = f->get_line().strip_edges();
 
-				if (l != String()) {
+				if (!l.is_empty()) {
 					Button *button = memnew(Button);
 					favorite_nodes->add_child(button);
 					button->set_text(l);
diff --git a/editor/scene_tree_editor.cpp b/editor/scene_tree_editor.cpp
index d64efcc2ac..4569841af6 100644
--- a/editor/scene_tree_editor.cpp
+++ b/editor/scene_tree_editor.cpp
@@ -120,7 +120,7 @@ void SceneTreeEditor::_cell_button_pressed(Object *p_item, int p_column, int p_i
 		undo_redo->commit_action();
 	} else if (p_id == BUTTON_WARNING) {
 		String config_err = n->get_configuration_warnings_as_string();
-		if (config_err == String()) {
+		if (config_err.is_empty()) {
 			return;
 		}
 		config_err = config_err.word_wrap(80);
@@ -297,16 +297,16 @@ bool SceneTreeEditor::_add_nodes(Node *p_node, TreeItem *p_parent, bool p_scroll
 		item->add_button(0, get_theme_icon(SNAME("InstanceOptions"), SNAME("EditorIcons")), BUTTON_SUBSCENE, false, TTR("Open in Editor"));
 
 		String tooltip = String(p_node->get_name()) + "\n" + TTR("Inherits:") + " " + p_node->get_scene_inherited_state()->get_path() + "\n" + TTR("Type:") + " " + p_node->get_class();
-		if (p_node->get_editor_description() != String()) {
+		if (!p_node->get_editor_description().is_empty()) {
 			tooltip += "\n\n" + p_node->get_editor_description();
 		}
 
 		item->set_tooltip(0, tooltip);
-	} else if (p_node != get_scene_node() && p_node->get_scene_file_path() != "" && can_open_instance) {
+	} else if (p_node != get_scene_node() && !p_node->get_scene_file_path().is_empty() && can_open_instance) {
 		item->add_button(0, get_theme_icon(SNAME("InstanceOptions"), SNAME("EditorIcons")), BUTTON_SUBSCENE, false, TTR("Open in Editor"));
 
 		String tooltip = String(p_node->get_name()) + "\n" + TTR("Instance:") + " " + p_node->get_scene_file_path() + "\n" + TTR("Type:") + " " + p_node->get_class();
-		if (p_node->get_editor_description() != String()) {
+		if (!p_node->get_editor_description().is_empty()) {
 			tooltip += "\n\n" + p_node->get_editor_description();
 		}
 
@@ -318,7 +318,7 @@ bool SceneTreeEditor::_add_nodes(Node *p_node, TreeItem *p_parent, bool p_scroll
 		}
 
 		String tooltip = String(p_node->get_name()) + "\n" + TTR("Type:") + " " + type;
-		if (p_node->get_editor_description() != String()) {
+		if (!p_node->get_editor_description().is_empty()) {
 			tooltip += "\n\n" + p_node->get_editor_description();
 		}
 
@@ -955,7 +955,7 @@ Variant SceneTreeEditor::get_drag_data_fw(const Point2 &p_point, Control *p_from
 		Node *n = get_node(np);
 		if (n) {
 			// Only allow selection if not part of an instantiated scene.
-			if (!n->get_owner() || n->get_owner() == get_scene_node() || n->get_owner()->get_scene_file_path() == String()) {
+			if (!n->get_owner() || n->get_owner() == get_scene_node() || n->get_owner()->get_scene_file_path().is_empty()) {
 				selected.push_back(n);
 				icons.push_back(next->get_icon(0));
 			}
@@ -1069,7 +1069,7 @@ bool SceneTreeEditor::can_drop_data_fw(const Point2 &p_point, const Variant &p_d
 		}
 	}
 
-	return String(d["type"]) == "nodes" && filter == String();
+	return String(d["type"]) == "nodes" && filter.is_empty();
 }
 
 void SceneTreeEditor::drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from) {
diff --git a/editor/script_create_dialog.cpp b/editor/script_create_dialog.cpp
index afb1d5107c..0e96a1d247 100644
--- a/editor/script_create_dialog.cpp
+++ b/editor/script_create_dialog.cpp
@@ -101,7 +101,7 @@ void ScriptCreateDialog::config(const String &p_base_name, const String &p_base_
 	parent_name->set_text(p_base_name);
 	parent_name->deselect();
 
-	if (p_base_path != "") {
+	if (!p_base_path.is_empty()) {
 		initial_bp = p_base_path.get_basename();
 		file_path->set_text(initial_bp + "." + ScriptServer::get_language(language_menu->get_selected())->get_extension());
 		current_language = language_menu->get_selected();
@@ -163,10 +163,10 @@ bool ScriptCreateDialog::_validate_class(const String &p_string) {
 String ScriptCreateDialog::_validate_path(const String &p_path, bool p_file_must_exist) {
 	String p = p_path.strip_edges();
 
-	if (p == "") {
+	if (p.is_empty()) {
 		return TTR("Path is empty.");
 	}
-	if (p.get_file().get_basename() == "") {
+	if (p.get_file().get_basename().is_empty()) {
 		return TTR("Filename is empty.");
 	}
 
@@ -227,7 +227,7 @@ String ScriptCreateDialog::_validate_path(const String &p_path, bool p_file_must
 
 	/* Let ScriptLanguage do custom validation */
 	String path_error = ScriptServer::get_language(language_menu->get_selected())->validate_path(p);
-	if (path_error != "") {
+	if (!path_error.is_empty()) {
 		return path_error;
 	}
 
@@ -295,7 +295,7 @@ void ScriptCreateDialog::_create_new() {
 	String cname_param = _get_class_name();
 
 	Ref<Script> scr;
-	if (script_template != "") {
+	if (!script_template.is_empty()) {
 		scr = ResourceLoader::load(script_template);
 		if (scr.is_null()) {
 			alert->set_text(vformat(TTR("Error loading template '%s'"), script_template));
@@ -358,7 +358,7 @@ void ScriptCreateDialog::_lang_changed(int l) {
 	String selected_ext = "." + language->get_extension();
 	String path = file_path->get_text();
 	String extension = "";
-	if (path != "") {
+	if (!path.is_empty()) {
 		if (path.find(".") != -1) {
 			extension = path.get_extension();
 		}
@@ -582,7 +582,7 @@ void ScriptCreateDialog::_path_changed(const String &p_path) {
 	is_new_script_created = true;
 
 	String path_error = _validate_path(p_path, false);
-	if (path_error != "") {
+	if (!path_error.is_empty()) {
 		_msg_path_valid(false, path_error);
 		_update_dialog();
 		return;
diff --git a/editor/settings_config_dialog.cpp b/editor/settings_config_dialog.cpp
index a39fdb3878..8e12cb76ef 100644
--- a/editor/settings_config_dialog.cpp
+++ b/editor/settings_config_dialog.cpp
@@ -148,7 +148,7 @@ void EditorSettingsDialog::unhandled_input(const Ref<InputEvent> &p_event) {
 
 		if (ED_IS_SHORTCUT("ui_undo", p_event)) {
 			String action = undo_redo->get_current_action_name();
-			if (action != "") {
+			if (!action.is_empty()) {
 				EditorNode::get_log()->add_message("Undo: " + action, EditorLog::MSG_TYPE_EDITOR);
 			}
 			undo_redo->undo();
@@ -158,7 +158,7 @@ void EditorSettingsDialog::unhandled_input(const Ref<InputEvent> &p_event) {
 		if (ED_IS_SHORTCUT("ui_redo", p_event)) {
 			undo_redo->redo();
 			String action = undo_redo->get_current_action_name();
-			if (action != "") {
+			if (!action.is_empty()) {
 				EditorNode::get_log()->add_message("Redo: " + action, EditorLog::MSG_TYPE_EDITOR);
 			}
 			handled = true;
diff --git a/editor/shader_create_dialog.cpp b/editor/shader_create_dialog.cpp
index a958226394..302f7f78c5 100644
--- a/editor/shader_create_dialog.cpp
+++ b/editor/shader_create_dialog.cpp
@@ -220,7 +220,7 @@ void ShaderCreateDialog::_language_changed(int p_language) {
 	String path = file_path->get_text();
 	String extension = "";
 
-	if (path != "") {
+	if (!path.is_empty()) {
 		if (path.find(".") != -1) {
 			extension = path.get_extension();
 		}
@@ -303,7 +303,7 @@ void ShaderCreateDialog::_path_changed(const String &p_path) {
 	is_new_shader_created = true;
 
 	String path_error = _validate_path(p_path);
-	if (path_error != "") {
+	if (!path_error.is_empty()) {
 		_msg_path_valid(false, path_error);
 		_update_dialog();
 		return;
@@ -325,7 +325,7 @@ void ShaderCreateDialog::_path_submitted(const String &p_path) {
 }
 
 void ShaderCreateDialog::config(const String &p_base_path, bool p_built_in_enabled, bool p_load_enabled, int p_preferred_type, int p_preferred_mode) {
-	if (p_base_path != "") {
+	if (!p_base_path.is_empty()) {
 		initial_base_path = p_base_path.get_basename();
 		file_path->set_text(initial_base_path + "." + language_data[language_menu->get_selected()].default_extension);
 		current_language = language_menu->get_selected();
@@ -355,10 +355,10 @@ void ShaderCreateDialog::config(const String &p_base_path, bool p_built_in_enabl
 String ShaderCreateDialog::_validate_path(const String &p_path) {
 	String p = p_path.strip_edges();
 
-	if (p == "") {
+	if (p.is_empty()) {
 		return TTR("Path is empty.");
 	}
-	if (p.get_file().get_basename() == "") {
+	if (p.get_file().get_basename().is_empty()) {
 		return TTR("Filename is empty.");
 	}
 
diff --git a/editor/shader_globals_editor.cpp b/editor/shader_globals_editor.cpp
index d504d3b137..31c1dc85a8 100644
--- a/editor/shader_globals_editor.cpp
+++ b/editor/shader_globals_editor.cpp
@@ -372,7 +372,7 @@ static Variant create_var(RS::GlobalVariableType p_type) {
 
 void ShaderGlobalsEditor::_variable_added() {
 	String var = variable_name->get_text().strip_edges();
-	if (var == "" || !var.is_valid_identifier()) {
+	if (var.is_empty() || !var.is_valid_identifier()) {
 		EditorNode::get_singleton()->show_warning(TTR("Please specify a valid variable identifier name."));
 		return;
 	}
diff --git a/main/main.cpp b/main/main.cpp
index c7b33f3f1b..6cc877f8c2 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -423,7 +423,7 @@ Error Main::test_setup() {
 	register_server_types();
 
 	translation_server->setup(); //register translations, load them, etc.
-	if (locale != "") {
+	if (!locale.is_empty()) {
 		translation_server->set_locale(locale);
 	}
 	translation_server->load_translations();
@@ -1122,7 +1122,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 	// Network file system needs to be configured before globals, since globals are based on the
 	// 'project.godot' file which will only be available through the network if this is enabled
 	FileAccessNetwork::configure();
-	if (remotefs != "") {
+	if (!remotefs.is_empty()) {
 		file_access_network_client = memnew(FileAccessNetworkClient);
 		int port;
 		if (remotefs.find(":") != -1) {
@@ -1289,7 +1289,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 					PROPERTY_HINT_ENUM, "vulkan,opengl3"));
 
 	// if not set on the command line
-	if (rendering_driver == "") {
+	if (rendering_driver.is_empty()) {
 		rendering_driver = GLOBAL_GET("rendering/driver/driver_name");
 	}
 
@@ -1419,7 +1419,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 	OS::get_singleton()->set_display_driver_id(display_driver_idx);
 
 	GLOBAL_DEF_RST_NOVAL("audio/driver/driver", AudioDriverManager::get_driver(0)->get_name());
-	if (audio_driver == "") { // Specified in project.godot.
+	if (audio_driver.is_empty()) { // Specified in project.godot.
 		audio_driver = GLOBAL_GET("audio/driver/driver");
 	}
 
@@ -1610,9 +1610,9 @@ Error Main::setup2(Thread::ID p_main_tid_override) {
 		ProjectSettings::get_singleton()->set_custom_property_info("input_devices/pen_tablet/driver.windows", PropertyInfo(Variant::STRING, "input_devices/pen_tablet/driver.windows", PROPERTY_HINT_ENUM, "wintab,winink"));
 	}
 
-	if (tablet_driver == "") { // specified in project.godot
+	if (tablet_driver.is_empty()) { // specified in project.godot
 		tablet_driver = GLOBAL_GET("input_devices/pen_tablet/driver");
-		if (tablet_driver == "") {
+		if (tablet_driver.is_empty()) {
 			tablet_driver = DisplayServer::get_singleton()->tablet_get_driver_name(0);
 		}
 	}
@@ -1624,7 +1624,7 @@ Error Main::setup2(Thread::ID p_main_tid_override) {
 		}
 	}
 
-	if (DisplayServer::get_singleton()->tablet_get_current_driver() == "") {
+	if (DisplayServer::get_singleton()->tablet_get_current_driver().is_empty()) {
 		DisplayServer::get_singleton()->tablet_set_current_driver(DisplayServer::get_singleton()->tablet_get_driver_name(0));
 	}
 
@@ -1717,7 +1717,7 @@ Error Main::setup2(Thread::ID p_main_tid_override) {
 		Ref<Image> boot_logo;
 
 		if (boot_logo_image) {
-			if (boot_logo_path != String()) {
+			if (!boot_logo_path.is_empty()) {
 				boot_logo.instantiate();
 				Error load_err = ImageLoader::load_image(boot_logo_path, boot_logo);
 				if (load_err) {
@@ -1811,7 +1811,7 @@ Error Main::setup2(Thread::ID p_main_tid_override) {
 	MAIN_PRINT("Main: Load Translations and Remaps");
 
 	translation_server->setup(); //register translations, load them, etc.
-	if (locale != "") {
+	if (!locale.is_empty()) {
 		translation_server->set_locale(locale);
 	}
 	translation_server->load_translations();
@@ -1833,11 +1833,11 @@ Error Main::setup2(Thread::ID p_main_tid_override) {
 	ProjectSettings::get_singleton()->set_custom_property_info("internationalization/rendering/text_driver", PropertyInfo(Variant::STRING, "internationalization/rendering/text_driver", PROPERTY_HINT_ENUM, text_driver_options));
 
 	/* Determine text driver */
-	if (text_driver == "") {
+	if (text_driver.is_empty()) {
 		text_driver = GLOBAL_GET("internationalization/rendering/text_driver");
 	}
 
-	if (text_driver != "") {
+	if (!text_driver.is_empty()) {
 		/* Load user selected text server. */
 		for (int i = 0; i < TextServerManager::get_singleton()->get_interface_count(); i++) {
 			if (TextServerManager::get_singleton()->get_interface(i)->get_name() == text_driver) {
@@ -1986,7 +1986,7 @@ bool Main::start() {
 		} else if (args[i] == "-p" || args[i] == "--project-manager") {
 			project_manager = true;
 #endif
-		} else if (args[i].length() && args[i][0] != '-' && positional_arg == "") {
+		} else if (args[i].length() && args[i][0] != '-' && positional_arg.is_empty()) {
 			positional_arg = args[i];
 
 			if (args[i].ends_with(".scn") ||
@@ -2045,7 +2045,7 @@ bool Main::start() {
 	}
 
 #ifdef TOOLS_ENABLED
-	if (doc_tool_path != "") {
+	if (!doc_tool_path.is_empty()) {
 		// Needed to instance editor-only classes for their default values
 		Engine::get_singleton()->set_editor_hint(true);
 
@@ -2124,12 +2124,12 @@ bool Main::start() {
 	}
 #endif
 
-	if (script == "" && game_path == "" && String(GLOBAL_GET("application/run/main_scene")) != "") {
+	if (script.is_empty() && game_path.is_empty() && String(GLOBAL_GET("application/run/main_scene")) != "") {
 		game_path = GLOBAL_GET("application/run/main_scene");
 	}
 
 #ifdef TOOLS_ENABLED
-	if (!editor && !project_manager && !cmdline_tool && script == "" && game_path == "") {
+	if (!editor && !project_manager && !cmdline_tool && script.is_empty() && game_path.is_empty()) {
 		// If we end up here, it means we didn't manage to detect what we want to run.
 		// Let's throw an error gently. The code leading to this is pretty brittle so
 		// this might end up triggered by valid usage, in which case we'll have to
@@ -2145,7 +2145,7 @@ bool Main::start() {
 	}
 	String main_loop_type = GLOBAL_DEF("application/run/main_loop_type", "SceneTree");
 
-	if (script != "") {
+	if (!script.is_empty()) {
 		Ref<Script> script_res = ResourceLoader::load(script);
 		ERR_FAIL_COND_V_MSG(script_res.is_null(), false, "Can't load script: " + script);
 
@@ -2194,7 +2194,7 @@ bool Main::start() {
 		}
 	}
 
-	if (!main_loop && main_loop_type == "") {
+	if (!main_loop && main_loop_type.is_empty()) {
 		main_loop_type = "SceneTree";
 	}
 
@@ -2235,7 +2235,7 @@ bool Main::start() {
 		ResourceSaver::add_custom_savers();
 
 		if (!project_manager && !editor) { // game
-			if (game_path != "" || script != "") {
+			if (!game_path.is_empty() || !script.is_empty()) {
 				//autoload
 				OrderedHashMap<StringName, ProjectSettings::AutoloadInfo> autoloads = ProjectSettings::get_singleton()->get_autoload_list();
 
@@ -2302,7 +2302,7 @@ bool Main::start() {
 			editor_node = memnew(EditorNode);
 			sml->get_root()->add_child(editor_node);
 
-			if (_export_preset != "") {
+			if (!_export_preset.is_empty()) {
 				editor_node->export_preset(_export_preset, positional_arg, export_debug, export_pack_only);
 				game_path = ""; // Do not load anything.
 			}
@@ -2417,7 +2417,7 @@ bool Main::start() {
 #endif
 
 		String local_game_path;
-		if (game_path != "" && !project_manager) {
+		if (!game_path.is_empty() && !project_manager) {
 			local_game_path = game_path.replace("\\", "/");
 
 			if (!local_game_path.begins_with("res://")) {
@@ -2473,7 +2473,7 @@ bool Main::start() {
 			// Load SSL Certificates from Project Settings (or builtin).
 			Crypto::load_default_certificates(GLOBAL_DEF("network/ssl/certificate_bundle_override", ""));
 
-			if (game_path != "") {
+			if (!game_path.is_empty()) {
 				Node *scene = nullptr;
 				Ref<PackedScene> scenedata = ResourceLoader::load(local_game_path);
 				if (scenedata.is_valid()) {
@@ -2485,7 +2485,7 @@ bool Main::start() {
 
 #ifdef OSX_ENABLED
 				String mac_iconpath = GLOBAL_DEF("application/config/macos_native_icon", "Variant()");
-				if (mac_iconpath != "") {
+				if (!mac_iconpath.is_empty()) {
 					DisplayServer::get_singleton()->set_native_icon(mac_iconpath);
 					hasicon = true;
 				}
@@ -2493,14 +2493,14 @@ bool Main::start() {
 
 #ifdef WINDOWS_ENABLED
 				String win_iconpath = GLOBAL_DEF("application/config/windows_native_icon", "Variant()");
-				if (win_iconpath != "") {
+				if (!win_iconpath.is_empty()) {
 					DisplayServer::get_singleton()->set_native_icon(win_iconpath);
 					hasicon = true;
 				}
 #endif
 
 				String iconpath = GLOBAL_DEF("application/config/icon", "Variant()");
-				if ((iconpath != "") && (!hasicon)) {
+				if ((!iconpath.is_empty()) && (!hasicon)) {
 					Ref<Image> icon;
 					icon.instantiate();
 					if (ImageLoader::load_image(iconpath, icon) == OK) {
diff --git a/modules/fbx/data/fbx_material.cpp b/modules/fbx/data/fbx_material.cpp
index 86baec4244..26c9ef8d54 100644
--- a/modules/fbx/data/fbx_material.cpp
+++ b/modules/fbx/data/fbx_material.cpp
@@ -60,7 +60,7 @@ String find_file(const String &p_base, const String &p_file_to_find) {
 
 	dir.list_dir_begin();
 	String n = dir.get_next();
-	while (n != String()) {
+	while (!n.is_empty()) {
 		if (n == "." || n == "..") {
 			n = dir.get_next();
 			continue;
@@ -68,7 +68,7 @@ String find_file(const String &p_base, const String &p_file_to_find) {
 		if (dir.current_is_dir()) {
 			// Don't use `path_to` or the returned path will be wrong.
 			const String f = find_file(p_base + "/" + n, p_file_to_find);
-			if (f != "") {
+			if (!f.is_empty()) {
 				return f;
 			}
 		} else if (n == p_file_to_find) {
@@ -119,7 +119,7 @@ String FBXMaterial::find_texture_path_by_filename(const String p_filename, const
 	dir.open("res://");
 	dir.list_dir_begin();
 	String n = dir.get_next();
-	while (n != String()) {
+	while (!n.is_empty()) {
 		if (n == "." || n == "..") {
 			n = dir.get_next();
 			continue;
@@ -136,7 +136,7 @@ String FBXMaterial::find_texture_path_by_filename(const String p_filename, const
 					lower_n.find("picture") >= 0) {
 				// Don't use `path_to` or the returned path will be wrong.
 				const String f = find_file(String("res://") + n, p_filename);
-				if (f != "") {
+				if (!f.is_empty()) {
 					return f;
 				}
 			}
diff --git a/modules/fbx/fbx_parser/FBXMeshGeometry.cpp b/modules/fbx/fbx_parser/FBXMeshGeometry.cpp
index 2cc25a0690..2bb634ea56 100644
--- a/modules/fbx/fbx_parser/FBXMeshGeometry.cpp
+++ b/modules/fbx/fbx_parser/FBXMeshGeometry.cpp
@@ -368,7 +368,7 @@ MeshGeometry::MappingData<T> MeshGeometry::resolve_vertex_data_array(
 	// UVIndex, MaterialIndex, NormalIndex, etc..
 	std::string indexDataElementName;
 
-	if (indexOverride != "") {
+	if (!indexOverride.empty()) {
 		// Colors should become ColorIndex
 		indexDataElementName = indexOverride;
 	} else {
diff --git a/modules/gdnative/nativescript/api_generator.cpp b/modules/gdnative/nativescript/api_generator.cpp
index 598f7c7ad0..ae16c22849 100644
--- a/modules/gdnative/nativescript/api_generator.cpp
+++ b/modules/gdnative/nativescript/api_generator.cpp
@@ -397,7 +397,7 @@ List<ClassAPI> generate_c_api_classes() {
 						arg_type = "Variant";
 					} else if (arg_info.type == Variant::OBJECT) {
 						arg_type = arg_info.class_name;
-						if (arg_type == "") {
+						if (arg_type.is_empty()) {
 							arg_type = Variant::get_type_name(arg_info.type);
 						}
 					} else {
diff --git a/modules/gdnative/nativescript/nativescript.cpp b/modules/gdnative/nativescript/nativescript.cpp
index 368eb67fa6..075977b60f 100644
--- a/modules/gdnative/nativescript/nativescript.cpp
+++ b/modules/gdnative/nativescript/nativescript.cpp
@@ -682,7 +682,7 @@ void NativeScriptInstance::get_property_list(List<PropertyInfo> *p_properties) c
 				ERR_CONTINUE(info.type < 0 || info.type >= Variant::VARIANT_MAX);
 
 				info.name = d["name"];
-				ERR_CONTINUE(info.name == "");
+				ERR_CONTINUE(info.name.is_empty());
 
 				if (d.has("hint")) {
 					info.hint = PropertyHint(d["hint"].operator int64_t());
diff --git a/modules/gdnative/pluginscript/pluginscript_script.cpp b/modules/gdnative/pluginscript/pluginscript_script.cpp
index 04a293ddbd..5bda9e1d53 100644
--- a/modules/gdnative/pluginscript/pluginscript_script.cpp
+++ b/modules/gdnative/pluginscript/pluginscript_script.cpp
@@ -232,8 +232,7 @@ bool PluginScript::instance_has(const Object *p_this) const {
 }
 
 bool PluginScript::has_source_code() const {
-	bool has = _source != "";
-	return has;
+	return !_source.is_empty();
 }
 
 String PluginScript::get_source_code() const {
@@ -257,11 +256,11 @@ Error PluginScript::reload(bool p_keep_state) {
 	_valid = false;
 	String basedir = _path;
 
-	if (basedir == "") {
+	if (basedir.is_empty()) {
 		basedir = get_path();
 	}
 
-	if (basedir != "") {
+	if (!basedir.is_empty()) {
 		basedir = basedir.get_base_dir();
 	}
 
diff --git a/modules/gdnative/pluginscript/register_types.cpp b/modules/gdnative/pluginscript/register_types.cpp
index 7faacfdcb9..c4fbff69f0 100644
--- a/modules/gdnative/pluginscript/register_types.cpp
+++ b/modules/gdnative/pluginscript/register_types.cpp
@@ -44,9 +44,9 @@
 static List<PluginScriptLanguage *> pluginscript_languages;
 
 static Error _check_language_desc(const godot_pluginscript_language_desc *desc) {
-	ERR_FAIL_COND_V(!desc->name || desc->name == String(), ERR_BUG);
-	ERR_FAIL_COND_V(!desc->type || desc->type == String(), ERR_BUG);
-	ERR_FAIL_COND_V(!desc->extension || desc->extension == String(), ERR_BUG);
+	ERR_FAIL_COND_V(!desc->name, ERR_BUG);
+	ERR_FAIL_COND_V(!desc->type, ERR_BUG);
+	ERR_FAIL_COND_V(!desc->extension, ERR_BUG);
 	ERR_FAIL_COND_V(!desc->recognized_extensions || !desc->recognized_extensions[0], ERR_BUG);
 	ERR_FAIL_COND_V(!desc->init, ERR_BUG);
 	ERR_FAIL_COND_V(!desc->finish, ERR_BUG);
diff --git a/modules/gdscript/editor/gdscript_highlighter.cpp b/modules/gdscript/editor/gdscript_highlighter.cpp
index 6529154e5c..4f711dfd1e 100644
--- a/modules/gdscript/editor/gdscript_highlighter.cpp
+++ b/modules/gdscript/editor/gdscript_highlighter.cpp
@@ -413,7 +413,7 @@ Dictionary GDScriptSyntaxHighlighter::_get_line_syntax_highlighting_impl(int p_l
 					previous_column = j;
 
 					// ignore if just whitespace
-					if (text != "") {
+					if (!text.is_empty()) {
 						previous_text = text;
 					}
 				}
@@ -509,7 +509,7 @@ void GDScriptSyntaxHighlighter::_update_cache() {
 	for (const String &comment : comments) {
 		String beg = comment.get_slice(" ", 0);
 		String end = comment.get_slice_count(" ") > 1 ? comment.get_slice(" ", 1) : String();
-		add_color_region(beg, end, comment_color, end == "");
+		add_color_region(beg, end, comment_color, end.is_empty());
 	}
 
 	/* Strings */
@@ -519,7 +519,7 @@ void GDScriptSyntaxHighlighter::_update_cache() {
 	for (const String &string : strings) {
 		String beg = string.get_slice(" ", 0);
 		String end = string.get_slice_count(" ") > 1 ? string.get_slice(" ", 1) : String();
-		add_color_region(beg, end, string_color, end == "");
+		add_color_region(beg, end, string_color, end.is_empty());
 	}
 
 	const Ref<Script> script = _get_edited_resource();
diff --git a/modules/gdscript/gdscript.cpp b/modules/gdscript/gdscript.cpp
index b76c2c0437..4822e411ce 100644
--- a/modules/gdscript/gdscript.cpp
+++ b/modules/gdscript/gdscript.cpp
@@ -389,7 +389,7 @@ bool GDScript::instance_has(const Object *p_this) const {
 }
 
 bool GDScript::has_source_code() const {
-	return source != "";
+	return !source.is_empty();
 }
 
 String GDScript::get_source_code() const {
@@ -458,7 +458,7 @@ void GDScript::_update_doc() {
 	doc.is_script_doc = true;
 
 	if (base.is_valid() && base->is_valid()) {
-		if (base->doc.name != String()) {
+		if (!base->doc.name.is_empty()) {
 			doc.inherits = base->doc.name;
 		} else {
 			doc.inherits = base->get_instance_base_type();
@@ -472,7 +472,7 @@ void GDScript::_update_doc() {
 	doc.tutorials = doc_tutorials;
 
 	for (const KeyValue<String, DocData::EnumDoc> &E : doc_enums) {
-		if (E.value.description != "") {
+		if (!E.value.description.is_empty()) {
 			doc.enums[E.key] = E.value.description;
 		}
 	}
@@ -616,11 +616,11 @@ bool GDScript::_update_exports(bool *r_err, bool p_recursive_call, PlaceHolderSc
 
 		String basedir = path;
 
-		if (basedir == "") {
+		if (basedir.is_empty()) {
 			basedir = get_path();
 		}
 
-		if (basedir != "") {
+		if (!basedir.is_empty()) {
 			basedir = basedir.get_base_dir();
 		}
 
@@ -642,7 +642,7 @@ bool GDScript::_update_exports(bool *r_err, bool p_recursive_call, PlaceHolderSc
 					path = c->extends_path;
 					if (path.is_relative_path()) {
 						String base = get_path();
-						if (base == "" || base.is_relative_path()) {
+						if (base.is_empty() || base.is_relative_path()) {
 							ERR_PRINT(("Could not resolve relative path for parent class: " + path).utf8().get_data());
 						} else {
 							path = base.get_base_dir().plus_file(path);
@@ -656,7 +656,7 @@ bool GDScript::_update_exports(bool *r_err, bool p_recursive_call, PlaceHolderSc
 					}
 				}
 
-				if (path != "") {
+				if (!path.is_empty()) {
 					if (path != get_path()) {
 						Ref<GDScript> bf = ResourceLoader::load(path);
 
@@ -809,11 +809,11 @@ Error GDScript::reload(bool p_keep_state) {
 
 	String basedir = path;
 
-	if (basedir == "") {
+	if (basedir.is_empty()) {
 		basedir = get_path();
 	}
 
-	if (basedir != "") {
+	if (!basedir.is_empty()) {
 		basedir = basedir.get_base_dir();
 	}
 
@@ -1122,7 +1122,7 @@ String GDScript::_get_gdscript_reference_class_name(const GDScript *p_gdscript)
 
 	String class_name;
 	while (p_gdscript) {
-		if (class_name == "") {
+		if (class_name.is_empty()) {
 			class_name = p_gdscript->get_script_class_name();
 		} else {
 			class_name = p_gdscript->get_script_class_name() + "." + class_name;
@@ -1433,7 +1433,7 @@ void GDScriptInstance::get_property_list(List<PropertyInfo> *p_properties) const
 					pinfo.type = Variant::Type(d["type"].operator int());
 					ERR_CONTINUE(pinfo.type < 0 || pinfo.type >= Variant::VARIANT_MAX);
 					pinfo.name = d["name"];
-					ERR_CONTINUE(pinfo.name == "");
+					ERR_CONTINUE(pinfo.name.is_empty());
 					if (d.has("hint")) {
 						pinfo.hint = PropertyHint(d["hint"].operator int());
 					}
diff --git a/modules/gdscript/gdscript_cache.cpp b/modules/gdscript/gdscript_cache.cpp
index e99bcddeb7..d0e85147f1 100644
--- a/modules/gdscript/gdscript_cache.cpp
+++ b/modules/gdscript/gdscript_cache.cpp
@@ -117,7 +117,7 @@ void GDScriptCache::remove_script(const String &p_path) {
 Ref<GDScriptParserRef> GDScriptCache::get_parser(const String &p_path, GDScriptParserRef::Status p_status, Error &r_error, const String &p_owner) {
 	MutexLock lock(singleton->lock);
 	Ref<GDScriptParserRef> ref;
-	if (p_owner != String()) {
+	if (!p_owner.is_empty()) {
 		singleton->dependencies[p_owner].insert(p_path);
 	}
 	if (singleton->parser_map.has(p_path)) {
@@ -163,7 +163,7 @@ String GDScriptCache::get_source_code(const String &p_path) {
 
 Ref<GDScript> GDScriptCache::get_shallow_script(const String &p_path, const String &p_owner) {
 	MutexLock lock(singleton->lock);
-	if (p_owner != String()) {
+	if (!p_owner.is_empty()) {
 		singleton->dependencies[p_owner].insert(p_path);
 	}
 	if (singleton->full_gdscript_cache.has(p_path)) {
@@ -186,7 +186,7 @@ Ref<GDScript> GDScriptCache::get_shallow_script(const String &p_path, const Stri
 Ref<GDScript> GDScriptCache::get_full_script(const String &p_path, Error &r_error, const String &p_owner) {
 	MutexLock lock(singleton->lock);
 
-	if (p_owner != String()) {
+	if (!p_owner.is_empty()) {
 		singleton->dependencies[p_owner].insert(p_path);
 	}
 
diff --git a/modules/gdscript/gdscript_compiler.cpp b/modules/gdscript/gdscript_compiler.cpp
index ab0fe5c37d..bba664c328 100644
--- a/modules/gdscript/gdscript_compiler.cpp
+++ b/modules/gdscript/gdscript_compiler.cpp
@@ -65,7 +65,7 @@ bool GDScriptCompiler::_is_class_member_property(GDScript *owner, const StringNa
 }
 
 void GDScriptCompiler::_set_error(const String &p_error, const GDScriptParser::Node *p_node) {
-	if (error != "") {
+	if (!error.is_empty()) {
 		return;
 	}
 
@@ -2020,7 +2020,7 @@ GDScriptFunction *GDScriptCompiler::_parse_function(Error &r_error, GDScript *p_
 	if (EngineDebugger::is_active()) {
 		String signature;
 		// Path.
-		if (p_script->get_path() != String()) {
+		if (!p_script->get_path().is_empty()) {
 			signature += p_script->get_path();
 		}
 		// Location.
@@ -2158,7 +2158,7 @@ Error GDScriptCompiler::_parse_class_level(GDScript *p_script, const GDScriptPar
 	p_script->tool = parser->is_tool();
 	p_script->name = p_class->identifier ? p_class->identifier->name : "";
 
-	if (p_script->name != "") {
+	if (!p_script->name.is_empty()) {
 		if (ClassDB::class_exists(p_script->name) && ClassDB::is_class_exposed(p_script->name)) {
 			_set_error("The class '" + p_script->name + "' shadows a native class", p_class);
 			return ERR_ALREADY_EXISTS;
@@ -2287,7 +2287,7 @@ Error GDScriptCompiler::_parse_class_level(GDScript *p_script, const GDScriptPar
 				p_script->constants.insert(name, constant->initializer->reduced_value);
 #ifdef TOOLS_ENABLED
 				p_script->member_lines[name] = constant->start_line;
-				if (constant->doc_description != String()) {
+				if (!constant->doc_description.is_empty()) {
 					p_script->doc_constants[name] = constant->doc_description;
 				}
 #endif
diff --git a/modules/gdscript/gdscript_editor.cpp b/modules/gdscript/gdscript_editor.cpp
index 71d2699c2e..34fe2364cb 100644
--- a/modules/gdscript/gdscript_editor.cpp
+++ b/modules/gdscript/gdscript_editor.cpp
@@ -1365,7 +1365,7 @@ static bool _guess_expression_type(GDScriptParser::CompletionContext &p_context,
 									String arg1 = args[0];
 									if (arg1.begins_with("/root/")) {
 										String which = arg1.get_slice("/", 2);
-										if (which != "") {
+										if (!which.is_empty()) {
 											// Try singletons first
 											if (GDScriptLanguage::get_singleton()->get_named_globals_map().has(which)) {
 												r_type = _type_from_variant(GDScriptLanguage::get_singleton()->get_named_globals_map()[which]);
@@ -2753,7 +2753,7 @@ void GDScriptLanguage::auto_indent_code(String &p_code, int p_from_line, int p_t
 		}
 
 		String st = l.substr(tc, l.length()).strip_edges();
-		if (st == "" || st.begins_with("#")) {
+		if (st.is_empty() || st.begins_with("#")) {
 			continue; //ignore!
 		}
 
diff --git a/modules/gdscript/gdscript_parser.cpp b/modules/gdscript/gdscript_parser.cpp
index fd6bd545c9..98a93a1a53 100644
--- a/modules/gdscript/gdscript_parser.cpp
+++ b/modules/gdscript/gdscript_parser.cpp
@@ -3100,7 +3100,7 @@ void GDScriptParser::get_class_doc_comment(int p_line, String &p_brief, String &
 	if (!comments.has(p_line)) {
 		return;
 	}
-	ERR_FAIL_COND(p_brief != "" || p_desc != "" || p_tutorials.size() != 0);
+	ERR_FAIL_COND(!p_brief.is_empty() || !p_desc.is_empty() || p_tutorials.size() != 0);
 
 	int line = p_line;
 	bool in_codeblock = false;
@@ -3132,7 +3132,7 @@ void GDScriptParser::get_class_doc_comment(int p_line, String &p_brief, String &
 		String striped_line = doc_line.strip_edges();
 
 		// Set the read mode.
-		if (striped_line.begins_with("@desc:") && p_desc == "") {
+		if (striped_line.begins_with("@desc:") && p_desc.is_empty()) {
 			mode = DESC;
 			striped_line = striped_line.trim_prefix("@desc:");
 			in_codeblock = _in_codeblock(doc_line, in_codeblock);
diff --git a/modules/gdscript/gdscript_vm.cpp b/modules/gdscript/gdscript_vm.cpp
index 6dd8c3e0dd..be9e5df2b0 100644
--- a/modules/gdscript/gdscript_vm.cpp
+++ b/modules/gdscript/gdscript_vm.cpp
@@ -755,7 +755,7 @@ Variant GDScriptFunction::call(GDScriptInstance *p_instance, const Variant **p_a
 #ifdef DEBUG_ENABLED
 				if (!valid) {
 					String v = index->operator String();
-					if (v != "") {
+					if (!v.is_empty()) {
 						v = "'" + v + "'";
 					} else {
 						v = "of type '" + _get_var_type(index) + "'";
@@ -785,7 +785,7 @@ Variant GDScriptFunction::call(GDScriptInstance *p_instance, const Variant **p_a
 #ifdef DEBUG_ENABLED
 				if (!valid) {
 					String v = index->operator String();
-					if (v != "") {
+					if (!v.is_empty()) {
 						v = "'" + v + "'";
 					} else {
 						v = "of type '" + _get_var_type(index) + "'";
@@ -817,7 +817,7 @@ Variant GDScriptFunction::call(GDScriptInstance *p_instance, const Variant **p_a
 #ifdef DEBUG_ENABLED
 				if (oob) {
 					String v = index->operator String();
-					if (v != "") {
+					if (!v.is_empty()) {
 						v = "'" + v + "'";
 					} else {
 						v = "of type '" + _get_var_type(index) + "'";
@@ -848,7 +848,7 @@ Variant GDScriptFunction::call(GDScriptInstance *p_instance, const Variant **p_a
 #ifdef DEBUG_ENABLED
 				if (!valid) {
 					String v = index->operator String();
-					if (v != "") {
+					if (!v.is_empty()) {
 						v = "'" + v + "'";
 					} else {
 						v = "of type '" + _get_var_type(index) + "'";
@@ -884,7 +884,7 @@ Variant GDScriptFunction::call(GDScriptInstance *p_instance, const Variant **p_a
 #ifdef DEBUG_ENABLED
 				if (!valid) {
 					String v = key->operator String();
-					if (v != "") {
+					if (!v.is_empty()) {
 						v = "'" + v + "'";
 					} else {
 						v = "of type '" + _get_var_type(key) + "'";
@@ -917,7 +917,7 @@ Variant GDScriptFunction::call(GDScriptInstance *p_instance, const Variant **p_a
 #ifdef DEBUG_ENABLED
 				if (oob) {
 					String v = index->operator String();
-					if (v != "") {
+					if (!v.is_empty()) {
 						v = "'" + v + "'";
 					} else {
 						v = "of type '" + _get_var_type(index) + "'";
@@ -3295,20 +3295,20 @@ Variant GDScriptFunction::call(GDScriptInstance *p_instance, const Variant **p_a
 		//error
 		// function, file, line, error, explanation
 		String err_file;
-		if (p_instance && ObjectDB::get_instance(p_instance->owner_id) != nullptr && p_instance->script->is_valid() && p_instance->script->path != "") {
+		if (p_instance && ObjectDB::get_instance(p_instance->owner_id) != nullptr && p_instance->script->is_valid() && !p_instance->script->path.is_empty()) {
 			err_file = p_instance->script->path;
 		} else if (script) {
 			err_file = script->path;
 		}
-		if (err_file == "") {
+		if (err_file.is_empty()) {
 			err_file = "<built-in>";
 		}
 		String err_func = name;
-		if (p_instance && ObjectDB::get_instance(p_instance->owner_id) != nullptr && p_instance->script->is_valid() && p_instance->script->name != "") {
+		if (p_instance && ObjectDB::get_instance(p_instance->owner_id) != nullptr && p_instance->script->is_valid() && !p_instance->script->name.is_empty()) {
 			err_func = p_instance->script->name + "." + err_func;
 		}
 		int err_line = line;
-		if (err_text == "") {
+		if (err_text.is_empty()) {
 			err_text = "Internal script error! Opcode: " + itos(last_opcode) + " (please report).";
 		}
 
diff --git a/modules/gdscript/tests/gdscript_test_runner.cpp b/modules/gdscript/tests/gdscript_test_runner.cpp
index d2e71efee7..21883b3c6e 100644
--- a/modules/gdscript/tests/gdscript_test_runner.cpp
+++ b/modules/gdscript/tests/gdscript_test_runner.cpp
@@ -267,7 +267,7 @@ bool GDScriptTestRunner::generate_class_index() {
 		String base_type;
 
 		String class_name = GDScriptLanguage::get_singleton()->get_global_class_name(test.get_source_file(), &base_type);
-		if (class_name == String()) {
+		if (class_name.is_empty()) {
 			continue;
 		}
 		ERR_FAIL_COND_V_MSG(ScriptServer::is_global_class(class_name), false,
diff --git a/modules/glslang/register_types.cpp b/modules/glslang/register_types.cpp
index dd545ff431..69bf59f848 100644
--- a/modules/glslang/register_types.cpp
+++ b/modules/glslang/register_types.cpp
@@ -120,7 +120,7 @@ static Vector<uint8_t> _compile_shader_glsl(RenderingDevice::ShaderStage p_stage
 		preamble += "#define has_VK_KHR_multiview 1\n";
 	}
 
-	if (preamble != "") {
+	if (!preamble.empty()) {
 		shader.setPreamble(preamble.c_str());
 	}
 
diff --git a/modules/gridmap/grid_map_editor_plugin.cpp b/modules/gridmap/grid_map_editor_plugin.cpp
index cf37f75d05..c2169c6335 100644
--- a/modules/gridmap/grid_map_editor_plugin.cpp
+++ b/modules/gridmap/grid_map_editor_plugin.cpp
@@ -885,11 +885,11 @@ void GridMapEditor::update_palette() {
 		String name = mesh_library->get_item_name(id);
 		Ref<Texture2D> preview = mesh_library->get_item_preview(id);
 
-		if (name == "") {
+		if (name.is_empty()) {
 			name = "#" + itos(id);
 		}
 
-		if (filter != "" && !filter.is_subsequence_ofi(name)) {
+		if (!filter.is_empty() && !filter.is_subsequence_ofi(name)) {
 			continue;
 		}
 
diff --git a/modules/hdr/image_loader_hdr.cpp b/modules/hdr/image_loader_hdr.cpp
index 32a31aa764..ea28d0c0c8 100644
--- a/modules/hdr/image_loader_hdr.cpp
+++ b/modules/hdr/image_loader_hdr.cpp
@@ -41,7 +41,7 @@ Error ImageLoaderHDR::load_image(Ref<Image> p_image, FileAccess *f, bool p_force
 	while (true) {
 		String line = f->get_line();
 		ERR_FAIL_COND_V(f->eof_reached(), ERR_FILE_UNRECOGNIZED);
-		if (line == "") { // empty line indicates end of header
+		if (line.is_empty()) { // empty line indicates end of header
 			break;
 		}
 		if (line.begins_with("FORMAT=")) { // leave option to implement other commands
diff --git a/modules/mbedtls/crypto_mbedtls.cpp b/modules/mbedtls/crypto_mbedtls.cpp
index 2522f1bb11..9d985e16d4 100644
--- a/modules/mbedtls/crypto_mbedtls.cpp
+++ b/modules/mbedtls/crypto_mbedtls.cpp
@@ -310,7 +310,7 @@ void CryptoMbedTLS::load_default_certificates(String p_path) {
 	default_certs = memnew(X509CertificateMbedTLS);
 	ERR_FAIL_COND(default_certs == nullptr);
 
-	if (p_path != "") {
+	if (!p_path.is_empty()) {
 		// Use certs defined in project settings.
 		default_certs->load(p_path);
 	}
diff --git a/modules/mono/editor/code_completion.cpp b/modules/mono/editor/code_completion.cpp
index 7433c865f5..61d0890288 100644
--- a/modules/mono/editor/code_completion.cpp
+++ b/modules/mono/editor/code_completion.cpp
@@ -155,7 +155,7 @@ PackedStringArray get_code_completion(CompletionKind p_kind, const String &p_scr
 				dir_access->list_dir_begin();
 				String filename = dir_access->get_next();
 
-				while (filename != "") {
+				while (!filename.is_empty()) {
 					if (filename == "." || filename == "..") {
 						filename = dir_access->get_next();
 						continue;
diff --git a/modules/text_server_adv/text_server_adv.cpp b/modules/text_server_adv/text_server_adv.cpp
index aa8978a430..e2908a8a66 100644
--- a/modules/text_server_adv/text_server_adv.cpp
+++ b/modules/text_server_adv/text_server_adv.cpp
@@ -4263,7 +4263,7 @@ void TextServerAdvanced::_shape_run(ShapedTextDataAdvanced *p_sd, int32_t p_star
 	}
 	hb_buffer_set_script(p_sd->hb_buffer, p_script);
 
-	if (p_sd->spans[p_span].language != String()) {
+	if (!p_sd->spans[p_span].language.is_empty()) {
 		hb_language_t lang = hb_language_from_string(p_sd->spans[p_span].language.ascii().get_data(), -1);
 		hb_buffer_set_language(p_sd->hb_buffer, lang);
 	}
@@ -4971,12 +4971,12 @@ void TextServerAdvanced::_insert_num_systems_lang() {
 }
 
 String TextServerAdvanced::format_number(const String &p_string, const String &p_language) const {
-	const StringName lang = (p_language == "") ? TranslationServer::get_singleton()->get_tool_locale() : p_language;
+	const StringName lang = (p_language.is_empty()) ? TranslationServer::get_singleton()->get_tool_locale() : p_language;
 
 	String res = p_string;
 	for (int i = 0; i < num_systems.size(); i++) {
 		if (num_systems[i].lang.has(lang)) {
-			if (num_systems[i].digits == String()) {
+			if (num_systems[i].digits.is_empty()) {
 				return p_string;
 			}
 			res.replace("e", num_systems[i].exp);
@@ -4996,12 +4996,12 @@ String TextServerAdvanced::format_number(const String &p_string, const String &p
 }
 
 String TextServerAdvanced::parse_number(const String &p_string, const String &p_language) const {
-	const StringName lang = (p_language == "") ? TranslationServer::get_singleton()->get_tool_locale() : p_language;
+	const StringName lang = (p_language.is_empty()) ? TranslationServer::get_singleton()->get_tool_locale() : p_language;
 
 	String res = p_string;
 	for (int i = 0; i < num_systems.size(); i++) {
 		if (num_systems[i].lang.has(lang)) {
-			if (num_systems[i].digits == String()) {
+			if (num_systems[i].digits.is_empty()) {
 				return p_string;
 			}
 			res.replace(num_systems[i].exp, "e");
@@ -5024,11 +5024,11 @@ String TextServerAdvanced::parse_number(const String &p_string, const String &p_
 }
 
 String TextServerAdvanced::percent_sign(const String &p_language) const {
-	const StringName lang = (p_language == "") ? TranslationServer::get_singleton()->get_tool_locale() : p_language;
+	const StringName lang = (p_language.is_empty()) ? TranslationServer::get_singleton()->get_tool_locale() : p_language;
 
 	for (int i = 0; i < num_systems.size(); i++) {
 		if (num_systems[i].lang.has(lang)) {
-			if (num_systems[i].percent_sign == String()) {
+			if (num_systems[i].percent_sign.is_empty()) {
 				return "%";
 			}
 			return num_systems[i].percent_sign;
diff --git a/modules/visual_script/editor/visual_script_editor.cpp b/modules/visual_script/editor/visual_script_editor.cpp
index 75a1980ede..9deea79ea6 100644
--- a/modules/visual_script/editor/visual_script_editor.cpp
+++ b/modules/visual_script/editor/visual_script_editor.cpp
@@ -1328,7 +1328,7 @@ void VisualScriptEditor::_create_function_dialog() {
 }
 
 void VisualScriptEditor::_create_function() {
-	String name = _validate_name((func_name_box->get_text() == "") ? "new_func" : func_name_box->get_text());
+	String name = _validate_name((func_name_box->get_text().is_empty()) ? "new_func" : func_name_box->get_text());
 	selected = name;
 	Vector2 pos = _get_available_pos();
 
@@ -2094,7 +2094,7 @@ Variant VisualScriptEditor::get_drag_data_fw(const Point2 &p_point, Control *p_f
 
 		String type = it->get_metadata(0);
 
-		if (type == String()) {
+		if (type.is_empty()) {
 			return Variant();
 		}
 
@@ -2622,7 +2622,7 @@ String VisualScriptEditor::get_name() {
 		name = TTR("[unsaved]");
 	} else if (script->is_built_in()) {
 		const String &script_name = script->get_name();
-		if (script_name != "") {
+		if (!script_name.is_empty()) {
 			// If the built-in script has a custom resource name defined,
 			// display the built-in script name as follows: `ResourceName (scene_file.tscn)`
 			name = vformat("%s (%s)", script_name, name.get_slice("::", 0));
@@ -2842,7 +2842,7 @@ void VisualScriptEditor::clear_edit_menu() {
 void VisualScriptEditor::_change_base_type_callback() {
 	String bt = select_base_type->get_selected_type();
 
-	ERR_FAIL_COND(bt == String());
+	ERR_FAIL_COND(bt.is_empty());
 	undo_redo->create_action(TTR("Change Base Type"));
 	undo_redo->add_do_method(script.ptr(), "set_instance_base_type", bt);
 	undo_redo->add_undo_method(script.ptr(), "set_instance_base_type", script->get_instance_base_type());
@@ -3213,7 +3213,7 @@ void VisualScriptEditor::_port_action_menu(int p_option) {
 			if (tg.type == Variant::OBJECT) {
 				if (tg.script.is_valid()) {
 					new_connect_node_select->select_from_script(tg.script, "");
-				} else if (type_string != String()) {
+				} else if (!type_string.is_empty()) {
 					new_connect_node_select->select_from_base_type(type_string);
 				} else {
 					new_connect_node_select->select_from_base_type(n->get_base_type());
@@ -3237,7 +3237,7 @@ void VisualScriptEditor::_port_action_menu(int p_option) {
 				property_info = script->get_node(port_action_node)->get_output_value_port_info(port_action_output);
 			}
 			if (tg.type == Variant::OBJECT) {
-				if (property_info.type == Variant::OBJECT && property_info.hint_string != String()) {
+				if (property_info.type == Variant::OBJECT && !property_info.hint_string.is_empty()) {
 					new_connect_node_select->select_from_action(property_info.hint_string);
 				} else {
 					new_connect_node_select->select_from_action("");
@@ -3462,7 +3462,7 @@ void VisualScriptEditor::_selected_connect_node(const String &p_text, const Stri
 					PropertyHint hint = script->get_node(port_action_node)->get_output_value_port_info(port_action_output).hint;
 					String base_type = script->get_node(port_action_node)->get_output_value_port_info(port_action_output).hint_string;
 
-					if (base_type != String() && hint == PROPERTY_HINT_TYPE_STRING) {
+					if (!base_type.is_empty() && hint == PROPERTY_HINT_TYPE_STRING) {
 						vsfc->set_base_type(base_type);
 					}
 					if (p_text == "call" || p_text == "call_deferred") {
@@ -3497,7 +3497,7 @@ void VisualScriptEditor::_selected_connect_node(const String &p_text, const Stri
 					PropertyHint hint = script->get_node(port_action_node)->get_output_value_port_info(port_action_output).hint;
 					String base_type = script->get_node(port_action_node)->get_output_value_port_info(port_action_output).hint_string;
 
-					if (base_type != String() && hint == PROPERTY_HINT_TYPE_STRING) {
+					if (!base_type.is_empty() && hint == PROPERTY_HINT_TYPE_STRING) {
 						vsp->set_base_type(base_type);
 					}
 				}
@@ -3526,7 +3526,7 @@ void VisualScriptEditor::_selected_connect_node(const String &p_text, const Stri
 				} else if (script->get_node(port_action_node).is_valid()) {
 					PropertyHint hint = script->get_node(port_action_node)->get_output_value_port_info(port_action_output).hint;
 					String base_type = script->get_node(port_action_node)->get_output_value_port_info(port_action_output).hint_string;
-					if (base_type != String() && hint == PROPERTY_HINT_TYPE_STRING) {
+					if (!base_type.is_empty() && hint == PROPERTY_HINT_TYPE_STRING) {
 						vsp->set_base_type(base_type);
 					}
 				}
diff --git a/modules/visual_script/editor/visual_script_property_selector.cpp b/modules/visual_script/editor/visual_script_property_selector.cpp
index 02307b712c..9fa35d4453 100644
--- a/modules/visual_script/editor/visual_script_property_selector.cpp
+++ b/modules/visual_script/editor/visual_script_property_selector.cpp
@@ -175,7 +175,7 @@ void VisualScriptPropertySelector::_update_search() {
 				String set_text = set_text_raw.capitalize();
 				String input = search_box->get_text().capitalize();
 
-				if (input == String() || get_text_raw.findn(input) != -1 || get_text.findn(input) != -1) {
+				if (input.is_empty() || get_text_raw.findn(input) != -1 || get_text.findn(input) != -1) {
 					TreeItem *item = search_options->create_item(category ? category : root);
 					item->set_text(0, get_text);
 					item->set_metadata(0, F.name);
@@ -188,7 +188,7 @@ void VisualScriptPropertySelector::_update_search() {
 					item->set_metadata(2, connecting);
 				}
 
-				if (input == String() || set_text_raw.findn(input) != -1 || set_text.findn(input) != -1) {
+				if (input.is_empty() || set_text_raw.findn(input) != -1 || set_text.findn(input) != -1) {
 					TreeItem *item = search_options->create_item(category ? category : root);
 					item->set_text(0, set_text);
 					item->set_metadata(0, F.name);
@@ -252,7 +252,7 @@ void VisualScriptPropertySelector::_update_search() {
 			String desc_raw = mi.name + desc_arguments;
 			String desc = desc_raw.capitalize().replace("( ", "(");
 
-			if (search_box->get_text() != String() &&
+			if (!search_box->get_text().is_empty() &&
 					name.findn(search_box->get_text()) == -1 &&
 					desc.findn(search_box->get_text()) == -1 &&
 					desc_raw.findn(search_box->get_text()) == -1) {
@@ -322,7 +322,7 @@ void VisualScriptPropertySelector::_update_search() {
 }
 
 void VisualScriptPropertySelector::create_visualscript_item(const String &name, TreeItem *const root, const String &search_input, const String &text) {
-	if (search_input == String() || text.findn(search_input) != -1) {
+	if (search_input.is_empty() || text.findn(search_input) != -1) {
 		TreeItem *item = search_options->create_item(root);
 		item->set_text(0, text);
 		item->set_icon(0, vbc->get_theme_icon(SNAME("VisualScript"), SNAME("EditorIcons")));
@@ -352,7 +352,7 @@ void VisualScriptPropertySelector::get_visual_node_names(const String &root_filt
 		bool in_filter = false;
 		Vector<String> tx_filters = search_box->get_text().split(" ");
 		for (int i = 0; i < tx_filters.size(); i++) {
-			if (tx_filters[i] == "") {
+			if (tx_filters[i].is_empty()) {
 				in_filter = true;
 			} else {
 				in_filter = false;
@@ -451,7 +451,7 @@ void VisualScriptPropertySelector::_item_selected() {
 
 	String at_class = class_type;
 
-	while (at_class != String()) {
+	while (!at_class.is_empty()) {
 		Map<String, DocData::ClassDoc>::Element *E = dd->class_list.find(at_class);
 		if (E) {
 			for (int i = 0; i < E->get().properties.size(); i++) {
@@ -465,7 +465,7 @@ void VisualScriptPropertySelector::_item_selected() {
 	}
 	at_class = class_type;
 
-	while (at_class != String()) {
+	while (!at_class.is_empty()) {
 		Map<String, DocData::ClassDoc>::Element *C = dd->class_list.find(at_class);
 		if (C) {
 			for (int i = 0; i < C->get().methods.size(); i++) {
@@ -521,7 +521,7 @@ void VisualScriptPropertySelector::_item_selected() {
 
 	memdelete(names);
 
-	if (text == String()) {
+	if (text.is_empty()) {
 		return;
 	}
 
diff --git a/modules/visual_script/visual_script.cpp b/modules/visual_script/visual_script.cpp
index 34d8c0b1e6..63bd9bbee4 100644
--- a/modules/visual_script/visual_script.cpp
+++ b/modules/visual_script/visual_script.cpp
@@ -1665,8 +1665,8 @@ Variant VisualScriptInstance::_call_internal(const StringName &p_method, void *p
 		String err_func = p_method;
 		int err_line = current_node_id; // Not a line but it works as one.
 
-		if (node && (r_error.error != Callable::CallError::CALL_ERROR_INVALID_METHOD || error_str == String())) {
-			if (error_str != String()) {
+		if (node && (r_error.error != Callable::CallError::CALL_ERROR_INVALID_METHOD || error_str.is_empty())) {
+			if (!error_str.is_empty()) {
 				error_str += " ";
 			}
 
@@ -2379,7 +2379,7 @@ void VisualScriptLanguage::debug_get_stack_level_locals(int p_level, List<String
 
 	for (int i = 0; i < node->input_port_count; i++) {
 		String name = node->get_base_node()->get_input_value_port_info(i).name;
-		if (name == String()) {
+		if (name.is_empty()) {
 			name = "in_" + itos(i);
 		}
 
@@ -2399,7 +2399,7 @@ void VisualScriptLanguage::debug_get_stack_level_locals(int p_level, List<String
 
 	for (int i = 0; i < node->output_port_count; i++) {
 		String name = node->get_base_node()->get_output_value_port_info(i).name;
-		if (name == String()) {
+		if (name.is_empty()) {
 			name = "out_" + itos(i);
 		}
 
diff --git a/modules/visual_script/visual_script_flow_control.cpp b/modules/visual_script/visual_script_flow_control.cpp
index 62a4f465cb..278d806595 100644
--- a/modules/visual_script/visual_script_flow_control.cpp
+++ b/modules/visual_script/visual_script_flow_control.cpp
@@ -724,7 +724,7 @@ String VisualScriptTypeCast::get_caption() const {
 }
 
 String VisualScriptTypeCast::get_text() const {
-	if (script != String()) {
+	if (!script.is_empty()) {
 		return "Is " + script.get_file() + "?";
 	} else {
 		return "Is " + base_type + "?";
@@ -762,7 +762,7 @@ String VisualScriptTypeCast::get_base_script() const {
 VisualScriptTypeCast::TypeGuess VisualScriptTypeCast::guess_output_type(TypeGuess *p_inputs, int p_output) const {
 	TypeGuess tg;
 	tg.type = Variant::OBJECT;
-	if (script != String()) {
+	if (!script.is_empty()) {
 		tg.script = ResourceLoader::load(script);
 	}
 	//if (!tg.script.is_valid()) {
@@ -793,7 +793,7 @@ public:
 			return 0;
 		}
 
-		if (script != String()) {
+		if (!script.is_empty()) {
 			Ref<Script> obj_script = obj->get_script();
 			if (!obj_script.is_valid()) {
 				return 1; //well, definitely not the script because object we got has no script.
@@ -853,7 +853,7 @@ void VisualScriptTypeCast::_bind_methods() {
 
 	String script_ext_hint;
 	for (const String &E : script_extensions) {
-		if (script_ext_hint != String()) {
+		if (!script_ext_hint.is_empty()) {
 			script_ext_hint += ",";
 		}
 		script_ext_hint += "*." + E;
diff --git a/modules/visual_script/visual_script_func_nodes.cpp b/modules/visual_script/visual_script_func_nodes.cpp
index a2ad38bf01..651464dfdb 100644
--- a/modules/visual_script/visual_script_func_nodes.cpp
+++ b/modules/visual_script/visual_script_func_nodes.cpp
@@ -370,7 +370,7 @@ void VisualScriptFunctionCall::_update_method_cache() {
 
 	} else if (call_mode == CALL_MODE_INSTANCE) {
 		type = base_type;
-		if (base_script != String()) {
+		if (!base_script.is_empty()) {
 			if (!ResourceCache::has(base_script) && ScriptServer::edit_request_func) {
 				ScriptServer::edit_request_func(base_script); //make sure it's loaded
 			}
@@ -539,7 +539,7 @@ void VisualScriptFunctionCall::_validate_property(PropertyInfo &property) const
 			property.hint = PROPERTY_HINT_ENUM;
 			String sl;
 			for (const Engine::Singleton &E : names) {
-				if (sl != String()) {
+				if (!sl.is_empty()) {
 					sl += ",";
 				}
 				sl += E.name;
@@ -580,7 +580,7 @@ void VisualScriptFunctionCall::_validate_property(PropertyInfo &property) const
 			property.hint = PROPERTY_HINT_METHOD_OF_BASE_TYPE;
 			property.hint_string = base_type;
 
-			if (base_script != String()) {
+			if (!base_script.is_empty()) {
 				if (!ResourceCache::has(base_script) && ScriptServer::edit_request_func) {
 					ScriptServer::edit_request_func(base_script); //make sure it's loaded
 				}
@@ -684,7 +684,7 @@ void VisualScriptFunctionCall::_bind_methods() {
 
 	String script_ext_hint;
 	for (const String &E : script_extensions) {
-		if (script_ext_hint != String()) {
+		if (!script_ext_hint.is_empty()) {
 			script_ext_hint += ",";
 		}
 		script_ext_hint += "*." + E;
@@ -1161,7 +1161,7 @@ void VisualScriptPropertySet::_update_cache() {
 			}
 		} else if (call_mode == CALL_MODE_INSTANCE) {
 			type = base_type;
-			if (base_script != String()) {
+			if (!base_script.is_empty()) {
 				if (!ResourceCache::has(base_script) && ScriptServer::edit_request_func) {
 					ScriptServer::edit_request_func(base_script); //make sure it's loaded
 				}
@@ -1321,7 +1321,7 @@ void VisualScriptPropertySet::_validate_property(PropertyInfo &property) const {
 			property.hint = PROPERTY_HINT_PROPERTY_OF_BASE_TYPE;
 			property.hint_string = base_type;
 
-			if (base_script != String()) {
+			if (!base_script.is_empty()) {
 				if (!ResourceCache::has(base_script) && ScriptServer::edit_request_func) {
 					ScriptServer::edit_request_func(base_script); //make sure it's loaded
 				}
@@ -1361,7 +1361,7 @@ void VisualScriptPropertySet::_validate_property(PropertyInfo &property) const {
 		property.hint = PROPERTY_HINT_ENUM;
 		property.hint_string = options;
 		property.type = Variant::STRING;
-		if (options == "") {
+		if (options.is_empty()) {
 			property.usage = PROPERTY_USAGE_NONE; //hide if type has no usable index
 		}
 	}
@@ -1411,7 +1411,7 @@ void VisualScriptPropertySet::_bind_methods() {
 
 	String script_ext_hint;
 	for (const String &E : script_extensions) {
-		if (script_ext_hint != String()) {
+		if (!script_ext_hint.is_empty()) {
 			script_ext_hint += ",";
 		}
 		script_ext_hint += "*." + E;
@@ -1847,7 +1847,7 @@ void VisualScriptPropertyGet::_update_cache() {
 			}
 		} else if (call_mode == CALL_MODE_INSTANCE) {
 			type = base_type;
-			if (base_script != String()) {
+			if (!base_script.is_empty()) {
 				if (!ResourceCache::has(base_script) && ScriptServer::edit_request_func) {
 					ScriptServer::edit_request_func(base_script); //make sure it's loaded
 				}
@@ -2027,7 +2027,7 @@ void VisualScriptPropertyGet::_validate_property(PropertyInfo &property) const {
 			property.hint = PROPERTY_HINT_PROPERTY_OF_BASE_TYPE;
 			property.hint_string = base_type;
 
-			if (base_script != String()) {
+			if (!base_script.is_empty()) {
 				if (!ResourceCache::has(base_script) && ScriptServer::edit_request_func) {
 					ScriptServer::edit_request_func(base_script); //make sure it's loaded
 				}
@@ -2066,7 +2066,7 @@ void VisualScriptPropertyGet::_validate_property(PropertyInfo &property) const {
 		property.hint = PROPERTY_HINT_ENUM;
 		property.hint_string = options;
 		property.type = Variant::STRING;
-		if (options == "") {
+		if (options.is_empty()) {
 			property.usage = PROPERTY_USAGE_NONE; //hide if type has no usable index
 		}
 	}
@@ -2113,7 +2113,7 @@ void VisualScriptPropertyGet::_bind_methods() {
 
 	String script_ext_hint;
 	for (const String &E : script_extensions) {
-		if (script_ext_hint != String()) {
+		if (!script_ext_hint.is_empty()) {
 			script_ext_hint += ",";
 		}
 		script_ext_hint += "." + E;
@@ -2324,7 +2324,7 @@ void VisualScriptEmitSignal::_validate_property(PropertyInfo &property) const {
 
 		String ml;
 		for (const StringName &E : sigs) {
-			if (ml != String()) {
+			if (!ml.is_empty()) {
 				ml += ",";
 			}
 			ml += E;
diff --git a/modules/visual_script/visual_script_nodes.cpp b/modules/visual_script/visual_script_nodes.cpp
index b0af030981..bb4c83bd24 100644
--- a/modules/visual_script/visual_script_nodes.cpp
+++ b/modules/visual_script/visual_script_nodes.cpp
@@ -1307,7 +1307,7 @@ void VisualScriptVariableGet::_validate_property(PropertyInfo &property) const {
 
 		String vhint;
 		for (const StringName &E : vars) {
-			if (vhint != String()) {
+			if (!vhint.is_empty()) {
 				vhint += ",";
 			}
 
@@ -1417,7 +1417,7 @@ void VisualScriptVariableSet::_validate_property(PropertyInfo &property) const {
 
 		String vhint;
 		for (const StringName &E : vars) {
-			if (vhint != String()) {
+			if (!vhint.is_empty()) {
 				vhint += ",";
 			}
 
@@ -1615,7 +1615,7 @@ PropertyInfo VisualScriptPreload::get_output_value_port_info(int p_idx) const {
 		pinfo.hint_string = preload->get_class();
 		if (preload->get_path().is_resource_file()) {
 			pinfo.name = preload->get_path();
-		} else if (preload->get_name() != String()) {
+		} else if (!preload->get_name().is_empty()) {
 			pinfo.name = preload->get_name();
 		} else {
 			pinfo.name = preload->get_class();
@@ -1994,7 +1994,7 @@ void VisualScriptClassConstant::_validate_property(PropertyInfo &property) const
 
 		property.hint_string = "";
 		for (const String &E : constants) {
-			if (property.hint_string != String()) {
+			if (!property.hint_string.is_empty()) {
 				property.hint_string += ",";
 			}
 			property.hint_string += E;
@@ -2132,7 +2132,7 @@ void VisualScriptBasicTypeConstant::_validate_property(PropertyInfo &property) c
 		}
 		property.hint_string = "";
 		for (const StringName &E : constants) {
-			if (property.hint_string != String()) {
+			if (!property.hint_string.is_empty()) {
 				property.hint_string += ",";
 			}
 			property.hint_string += String(E);
@@ -2363,7 +2363,7 @@ void VisualScriptEngineSingleton::_validate_property(PropertyInfo &property) con
 			continue; //skip these, too simple named
 		}
 
-		if (cc != String()) {
+		if (!cc.is_empty()) {
 			cc += ",";
 		}
 		cc += E.name;
@@ -3147,7 +3147,7 @@ String VisualScriptSubCall::get_caption() const {
 String VisualScriptSubCall::get_text() const {
 	Ref<Script> script = get_script();
 	if (script.is_valid()) {
-		if (script->get_name() != String()) {
+		if (!script->get_name().is_empty()) {
 			return script->get_name();
 		}
 		if (script->get_path().is_resource_file()) {
@@ -3786,7 +3786,7 @@ void VisualScriptInputAction::_validate_property(PropertyInfo &property) const {
 		al.sort();
 
 		for (int i = 0; i < al.size(); i++) {
-			if (actions != String()) {
+			if (!actions.is_empty()) {
 				actions += ",";
 			}
 			actions += al[i];
diff --git a/modules/visual_script/visual_script_yield_nodes.cpp b/modules/visual_script/visual_script_yield_nodes.cpp
index 4b89c9ccd0..c5d17e5a11 100644
--- a/modules/visual_script/visual_script_yield_nodes.cpp
+++ b/modules/visual_script/visual_script_yield_nodes.cpp
@@ -449,7 +449,7 @@ void VisualScriptYieldSignal::_validate_property(PropertyInfo &property) const {
 
 		String ml;
 		for (const String &E : mstring) {
-			if (ml != String()) {
+			if (!ml.is_empty()) {
 				ml += ",";
 			}
 			ml += E;
diff --git a/modules/websocket/wsl_server.cpp b/modules/websocket/wsl_server.cpp
index 514b2d055f..a3d0d3554f 100644
--- a/modules/websocket/wsl_server.cpp
+++ b/modules/websocket/wsl_server.cpp
@@ -83,11 +83,11 @@ bool WSLServer::PendingPeer::_parse_request(const Vector<String> p_protocols, St
 				break;
 			}
 			// Found a protocol
-			if (protocol != "") {
+			if (!protocol.is_empty()) {
 				break;
 			}
 		}
-		if (protocol == "") { // Invalid protocol(s) requested
+		if (protocol.is_empty()) { // Invalid protocol(s) requested
 			return false;
 		}
 	} else if (p_protocols.size() > 0) { // No protocol requested, but we need one
@@ -138,7 +138,7 @@ Error WSLServer::PendingPeer::do_handshake(const Vector<String> p_protocols, uin
 				s += "Upgrade: websocket\r\n";
 				s += "Connection: Upgrade\r\n";
 				s += "Sec-WebSocket-Accept: " + WSLPeer::compute_key_response(key) + "\r\n";
-				if (protocol != "") {
+				if (!protocol.is_empty()) {
 					s += "Sec-WebSocket-Protocol: " + protocol + "\r\n";
 				}
 				s += "\r\n";
diff --git a/platform/android/dir_access_jandroid.cpp b/platform/android/dir_access_jandroid.cpp
index 0eeee8215d..d2726b8652 100644
--- a/platform/android/dir_access_jandroid.cpp
+++ b/platform/android/dir_access_jandroid.cpp
@@ -102,7 +102,7 @@ String DirAccessJAndroid::get_drive(int p_drive) {
 Error DirAccessJAndroid::change_dir(String p_dir) {
 	JNIEnv *env = get_jni_env();
 
-	if (p_dir == "" || p_dir == "." || (p_dir == ".." && current_dir == ""))
+	if (p_dir.is_empty() || p_dir == "." || (p_dir == ".." && current_dir.is_empty()))
 		return OK;
 
 	String new_dir;
@@ -114,7 +114,7 @@ Error DirAccessJAndroid::change_dir(String p_dir) {
 		new_dir = p_dir.substr(1, p_dir.length());
 	else if (p_dir.begins_with("res://"))
 		new_dir = p_dir.substr(6, p_dir.length());
-	else if (current_dir == "")
+	else if (current_dir.is_empty())
 		new_dir = p_dir;
 	else
 		new_dir = current_dir.plus_file(p_dir);
@@ -141,7 +141,7 @@ String DirAccessJAndroid::get_current_dir(bool p_include_drive) {
 
 bool DirAccessJAndroid::file_exists(String p_file) {
 	String sd;
-	if (current_dir == "")
+	if (current_dir.is_empty())
 		sd = p_file;
 	else
 		sd = current_dir.plus_file(p_file);
@@ -158,7 +158,7 @@ bool DirAccessJAndroid::dir_exists(String p_dir) {
 
 	String sd;
 
-	if (current_dir == "")
+	if (current_dir.is_empty())
 		sd = p_dir;
 	else {
 		if (p_dir.is_relative_path())
diff --git a/platform/android/export/export_plugin.cpp b/platform/android/export/export_plugin.cpp
index c5d3cbd966..0826f5362e 100644
--- a/platform/android/export/export_plugin.cpp
+++ b/platform/android/export/export_plugin.cpp
@@ -303,7 +303,7 @@ void EditorExportPlatformAndroid::_check_for_changes_poll_thread(void *ud) {
 						}
 					}
 
-					if (d.description == "") {
+					if (d.description.is_empty()) {
 						//in the oven, request!
 						args.clear();
 						args.push_back("-s");
@@ -352,7 +352,7 @@ void EditorExportPlatformAndroid::_check_for_changes_poll_thread(void *ud) {
 						}
 
 						d.name = vendor + " " + device;
-						if (device == String()) {
+						if (device.is_empty()) {
 							continue;
 						}
 					}
@@ -390,13 +390,13 @@ void EditorExportPlatformAndroid::_check_for_changes_poll_thread(void *ud) {
 
 String EditorExportPlatformAndroid::get_project_name(const String &p_name) const {
 	String aname;
-	if (p_name != "") {
+	if (!p_name.is_empty()) {
 		aname = p_name;
 	} else {
 		aname = ProjectSettings::get_singleton()->get("application/config/name");
 	}
 
-	if (aname == "") {
+	if (aname.is_empty()) {
 		aname = VERSION_NAME;
 	}
 
@@ -420,7 +420,7 @@ String EditorExportPlatformAndroid::get_package_name(const String &p_package) co
 			first = false;
 		}
 	}
-	if (name == "") {
+	if (name.is_empty()) {
 		name = "noname";
 	}
 
@@ -577,7 +577,7 @@ Vector<String> EditorExportPlatformAndroid::list_gdap_files(const String &p_path
 		da->list_dir_begin();
 		while (true) {
 			String file = da->get_next();
-			if (file == "") {
+			if (file.is_empty()) {
 				break;
 			}
 
@@ -2080,7 +2080,7 @@ bool EditorExportPlatformAndroid::can_export(const Ref<EditorExportPreset> &p_pr
 	}
 
 	String sdk_path = EditorSettings::get_singleton()->get("export/android/android_sdk_path");
-	if (sdk_path == "") {
+	if (sdk_path.is_empty()) {
 		err += TTR("A valid Android SDK path is required in Editor Settings.") + "\n";
 		valid = false;
 	} else {
@@ -2127,7 +2127,7 @@ bool EditorExportPlatformAndroid::can_export(const Ref<EditorExportPreset> &p_pr
 	if (apk_expansion) {
 		String apk_expansion_pkey = p_preset->get("apk_expansion/public_key");
 
-		if (apk_expansion_pkey == "") {
+		if (apk_expansion_pkey.is_empty()) {
 			valid = false;
 
 			err += TTR("Invalid public key for APK expansion.") + "\n";
@@ -2143,7 +2143,7 @@ bool EditorExportPlatformAndroid::can_export(const Ref<EditorExportPreset> &p_pr
 	}
 
 	String etc_error = test_etc2();
-	if (etc_error != String()) {
+	if (!etc_error.is_empty()) {
 		valid = false;
 		err += etc_error;
 	}
@@ -2680,13 +2680,13 @@ Error EditorExportPlatformAndroid::export_project_helper(const Ref<EditorExportP
 		src_apk = p_preset->get("custom_template/release");
 	}
 	src_apk = src_apk.strip_edges();
-	if (src_apk == "") {
+	if (src_apk.is_empty()) {
 		if (p_debug) {
 			src_apk = find_export_template("android_debug.apk");
 		} else {
 			src_apk = find_export_template("android_release.apk");
 		}
-		if (src_apk == "") {
+		if (src_apk.is_empty()) {
 			EditorNode::add_io_error(vformat(TTR("Package not found: %s"), src_apk));
 			return ERR_FILE_NOT_FOUND;
 		}
diff --git a/platform/android/export/gradle_export_util.cpp b/platform/android/export/gradle_export_util.cpp
index 658c0ecd0a..7f514332f7 100644
--- a/platform/android/export/gradle_export_util.cpp
+++ b/platform/android/export/gradle_export_util.cpp
@@ -161,7 +161,7 @@ Error _create_project_name_strings_files(const Ref<EditorExportPreset> &p_preset
 	da->list_dir_begin();
 	while (true) {
 		String file = da->get_next();
-		if (file == "") {
+		if (file.is_empty()) {
 			break;
 		}
 		if (!file.begins_with("values-")) {
diff --git a/platform/android/os_android.cpp b/platform/android/os_android.cpp
index 0e5e10bc0a..ffd69a56b9 100644
--- a/platform/android/os_android.cpp
+++ b/platform/android/os_android.cpp
@@ -198,7 +198,7 @@ String OS_Android::get_resource_dir() const {
 
 String OS_Android::get_locale() const {
 	String locale = godot_io_java->get_locale();
-	if (locale != "") {
+	if (!locale.is_empty()) {
 		return locale;
 	}
 
@@ -207,7 +207,7 @@ String OS_Android::get_locale() const {
 
 String OS_Android::get_model_name() const {
 	String model = godot_io_java->get_model();
-	if (model != "")
+	if (!model.is_empty())
 		return model;
 
 	return OS_Unix::get_model_name();
@@ -218,11 +218,11 @@ String OS_Android::get_data_path() const {
 }
 
 String OS_Android::get_user_data_dir() const {
-	if (data_dir_cache != String())
+	if (!data_dir_cache.is_empty())
 		return data_dir_cache;
 
 	String data_dir = godot_io_java->get_user_data_dir();
-	if (data_dir != "") {
+	if (!data_dir.is_empty()) {
 		data_dir_cache = _remove_symlink(data_dir);
 		return data_dir_cache;
 	}
@@ -230,11 +230,11 @@ String OS_Android::get_user_data_dir() const {
 }
 
 String OS_Android::get_cache_path() const {
-	if (cache_dir_cache != String())
+	if (!cache_dir_cache.is_empty())
 		return cache_dir_cache;
 
 	String cache_dir = godot_io_java->get_cache_dir();
-	if (cache_dir != "") {
+	if (!cache_dir.is_empty()) {
 		cache_dir_cache = _remove_symlink(cache_dir);
 		return cache_dir_cache;
 	}
@@ -243,7 +243,7 @@ String OS_Android::get_cache_path() const {
 
 String OS_Android::get_unique_id() const {
 	String unique_id = godot_io_java->get_unique_id();
-	if (unique_id != "")
+	if (!unique_id.is_empty())
 		return unique_id;
 
 	return OS::get_unique_id();
diff --git a/platform/iphone/export/export_plugin.cpp b/platform/iphone/export/export_plugin.cpp
index 0abd255c7c..247b456b26 100644
--- a/platform/iphone/export/export_plugin.cpp
+++ b/platform/iphone/export/export_plugin.cpp
@@ -1363,10 +1363,10 @@ Error EditorExportPlatformIOS::export_project(const Ref<EditorExportPreset> &p_p
 		src_pkg_name = p_preset->get("custom_template/release");
 	}
 
-	if (src_pkg_name == "") {
+	if (src_pkg_name.is_empty()) {
 		String err;
 		src_pkg_name = find_export_template("iphone.zip", &err);
-		if (src_pkg_name == "") {
+		if (src_pkg_name.is_empty()) {
 			EditorNode::add_io_error(err);
 			return ERR_FILE_NOT_FOUND;
 		}
@@ -1767,7 +1767,7 @@ bool EditorExportPlatformIOS::can_export(const Ref<EditorExportPreset> &p_preset
 	}
 
 	String etc_error = test_etc2_or_pvrtc();
-	if (etc_error != String()) {
+	if (!etc_error.is_empty()) {
 		valid = false;
 		err += etc_error;
 	}
diff --git a/platform/javascript/export/export_plugin.cpp b/platform/javascript/export/export_plugin.cpp
index 018dd3b664..9733435584 100644
--- a/platform/javascript/export/export_plugin.cpp
+++ b/platform/javascript/export/export_plugin.cpp
@@ -380,7 +380,7 @@ bool EditorExportPlatformJavaScript::can_export(const Ref<EditorExportPreset> &p
 
 	if (p_preset->get("vram_texture_compression/for_mobile")) {
 		String etc_error = test_etc2();
-		if (etc_error != String()) {
+		if (!etc_error.is_empty()) {
 			valid = false;
 			err += etc_error;
 		}
@@ -415,7 +415,7 @@ Error EditorExportPlatformJavaScript::export_project(const Ref<EditorExportPrese
 	// Find the correct template
 	String template_path = p_debug ? custom_debug : custom_release;
 	template_path = template_path.strip_edges();
-	if (template_path == String()) {
+	if (template_path.is_empty()) {
 		ExportMode mode = (ExportMode)(int)p_preset->get("variant/export_type");
 		template_path = find_export_template(_get_template_name(mode, p_debug));
 	}
@@ -424,7 +424,7 @@ Error EditorExportPlatformJavaScript::export_project(const Ref<EditorExportPrese
 		return ERR_FILE_BAD_PATH;
 	}
 
-	if (template_path != String() && !FileAccess::exists(template_path)) {
+	if (!template_path.is_empty() && !FileAccess::exists(template_path)) {
 		EditorNode::get_singleton()->show_warning(TTR("Template file not found:") + "\n" + template_path);
 		return ERR_FILE_NOT_FOUND;
 	}
diff --git a/platform/linuxbsd/os_linuxbsd.cpp b/platform/linuxbsd/os_linuxbsd.cpp
index 69474c6dec..c39b5cb784 100644
--- a/platform/linuxbsd/os_linuxbsd.cpp
+++ b/platform/linuxbsd/os_linuxbsd.cpp
@@ -419,7 +419,7 @@ Error OS_LinuxBSD::move_to_trash(const String &p_path) {
 	String mnt = get_mountpoint(p_path);
 
 	// If there is a directory "[Mountpoint]/.Trash-[UID], use it as the trash can.
-	if (mnt != "") {
+	if (!mnt.is_empty()) {
 		String path(mnt + "/.Trash-" + itos(getuid()));
 		struct stat s;
 		if (!stat(path.utf8().get_data(), &s)) {
@@ -428,7 +428,7 @@ Error OS_LinuxBSD::move_to_trash(const String &p_path) {
 	}
 
 	// Otherwise, if ${XDG_DATA_HOME} is defined, use "${XDG_DATA_HOME}/Trash" as the trash can.
-	if (trash_path == "") {
+	if (trash_path.is_empty()) {
 		char *dhome = getenv("XDG_DATA_HOME");
 		if (dhome) {
 			trash_path = String(dhome) + "/Trash";
@@ -436,7 +436,7 @@ Error OS_LinuxBSD::move_to_trash(const String &p_path) {
 	}
 
 	// Otherwise, if ${HOME} is defined, use "${HOME}/.local/share/Trash" as the trash can.
-	if (trash_path == "") {
+	if (trash_path.is_empty()) {
 		char *home = getenv("HOME");
 		if (home) {
 			trash_path = String(home) + "/.local/share/Trash";
@@ -444,7 +444,7 @@ Error OS_LinuxBSD::move_to_trash(const String &p_path) {
 	}
 
 	// Issue an error if none of the previous locations is appropriate for the trash can.
-	ERR_FAIL_COND_V_MSG(trash_path == "", FAILED, "Could not determine the trash can location");
+	ERR_FAIL_COND_V_MSG(trash_path.is_empty(), FAILED, "Could not determine the trash can location");
 
 	// Create needed directories for decided trash can location.
 	{
diff --git a/platform/osx/export/export_plugin.cpp b/platform/osx/export/export_plugin.cpp
index 36a2e5e205..8126510245 100644
--- a/platform/osx/export/export_plugin.cpp
+++ b/platform/osx/export/export_plugin.cpp
@@ -481,10 +481,10 @@ Error EditorExportPlatformOSX::export_project(const Ref<EditorExportPreset> &p_p
 		src_pkg_name = p_preset->get("custom_template/release");
 	}
 
-	if (src_pkg_name == "") {
+	if (src_pkg_name.is_empty()) {
 		String err;
 		src_pkg_name = find_export_template("osx.zip", &err);
-		if (src_pkg_name == "") {
+		if (src_pkg_name.is_empty()) {
 			EditorNode::add_io_error(err);
 			return ERR_FILE_NOT_FOUND;
 		}
@@ -607,7 +607,7 @@ Error EditorExportPlatformOSX::export_project(const Ref<EditorExportPreset> &p_p
 				iconpath = ProjectSettings::get_singleton()->get("application/config/icon");
 			}
 
-			if (iconpath != "") {
+			if (!iconpath.is_empty()) {
 				if (iconpath.get_extension() == "icns") {
 					FileAccess *icon = FileAccess::open(iconpath, FileAccess::READ);
 					if (icon) {
@@ -695,7 +695,7 @@ Error EditorExportPlatformOSX::export_project(const Ref<EditorExportPreset> &p_p
 
 		String ent_path = p_preset->get("codesign/entitlements/custom_file");
 		String hlp_ent_path = EditorPaths::get_singleton()->get_cache_dir().plus_file(pkg_name + "_helper.entitlements");
-		if (sign_enabled && (ent_path == "")) {
+		if (sign_enabled && (ent_path.is_empty())) {
 			ent_path = EditorPaths::get_singleton()->get_cache_dir().plus_file(pkg_name + ".entitlements");
 
 			FileAccess *ent_f = FileAccess::open(ent_path, FileAccess::WRITE);
diff --git a/platform/uwp/export/export_plugin.cpp b/platform/uwp/export/export_plugin.cpp
index 192814efe4..31a6889543 100644
--- a/platform/uwp/export/export_plugin.cpp
+++ b/platform/uwp/export/export_plugin.cpp
@@ -257,7 +257,7 @@ Error EditorExportPlatformUWP::export_project(const Ref<EditorExportPreset> &p_p
 
 	Platform arch = (Platform)(int)p_preset->get("architecture/target");
 
-	if (src_appx == "") {
+	if (src_appx.is_empty()) {
 		String err, infix;
 		switch (arch) {
 			case ARM: {
@@ -275,7 +275,7 @@ Error EditorExportPlatformUWP::export_project(const Ref<EditorExportPreset> &p_p
 		} else {
 			src_appx = find_export_template("uwp" + infix + "release.zip", &err);
 		}
-		if (src_appx == "") {
+		if (src_appx.is_empty()) {
 			EditorNode::add_io_error(err);
 			return ERR_FILE_NOT_FOUND;
 		}
@@ -431,7 +431,7 @@ Error EditorExportPlatformUWP::export_project(const Ref<EditorExportPreset> &p_p
 #ifdef WINDOWS_ENABLED
 	// Sign with signtool
 	String signtool_path = EditorSettings::get_singleton()->get("export/uwp/signtool");
-	if (signtool_path == String()) {
+	if (signtool_path.is_empty()) {
 		return OK;
 	}
 
@@ -452,7 +452,7 @@ Error EditorExportPlatformUWP::export_project(const Ref<EditorExportPreset> &p_p
 		cert_alg = p_preset->get("signing/algorithm");
 	}
 
-	if (cert_path == String()) {
+	if (cert_path.is_empty()) {
 		return OK; // Certificate missing, don't try to sign
 	}
 
diff --git a/platform/windows/display_server_windows.cpp b/platform/windows/display_server_windows.cpp
index 9fe15366f4..2878981078 100644
--- a/platform/windows/display_server_windows.cpp
+++ b/platform/windows/display_server_windows.cpp
@@ -1565,7 +1565,7 @@ String DisplayServerWindows::keyboard_get_layout_name(int p_index) const {
 	GetKeyboardLayoutList(layout_count, layouts);
 
 	String ret = _get_full_layout_name_from_registry(layouts[p_index]); // Try reading full name from Windows registry, fallback to locale name if failed (e.g. on Wine).
-	if (ret == String()) {
+	if (ret.is_empty()) {
 		WCHAR buf[LOCALE_NAME_MAX_LENGTH];
 		memset(buf, 0, LOCALE_NAME_MAX_LENGTH * sizeof(WCHAR));
 		LCIDToLocaleName(MAKELCID(LOWORD(layouts[p_index]), SORT_DEFAULT), buf, LOCALE_NAME_MAX_LENGTH, 0);
diff --git a/platform/windows/export/export_plugin.cpp b/platform/windows/export/export_plugin.cpp
index 165e86c066..5a1cdb0962 100644
--- a/platform/windows/export/export_plugin.cpp
+++ b/platform/windows/export/export_plugin.cpp
@@ -82,7 +82,7 @@ void EditorExportPlatformWindows::get_export_options(List<ExportOption> *r_optio
 void EditorExportPlatformWindows::_rcedit_add_data(const Ref<EditorExportPreset> &p_preset, const String &p_path) {
 	String rcedit_path = EditorSettings::get_singleton()->get("export/windows/rcedit");
 
-	if (rcedit_path == String()) {
+	if (rcedit_path.is_empty()) {
 		return;
 	}
 
@@ -95,12 +95,12 @@ void EditorExportPlatformWindows::_rcedit_add_data(const Ref<EditorExportPreset>
 	// On non-Windows we need WINE to run rcedit
 	String wine_path = EditorSettings::get_singleton()->get("export/windows/wine");
 
-	if (wine_path != String() && !FileAccess::exists(wine_path)) {
+	if (!wine_path.is_empty() && !FileAccess::exists(wine_path)) {
 		ERR_PRINT("Could not find wine executable at " + wine_path + ", no icon or app information data will be included.");
 		return;
 	}
 
-	if (wine_path == String()) {
+	if (wine_path.is_empty()) {
 		wine_path = "wine"; // try to run wine from PATH
 	}
 #endif
@@ -117,39 +117,39 @@ void EditorExportPlatformWindows::_rcedit_add_data(const Ref<EditorExportPreset>
 
 	List<String> args;
 	args.push_back(p_path);
-	if (icon_path != String()) {
+	if (!icon_path.is_empty()) {
 		args.push_back("--set-icon");
 		args.push_back(icon_path);
 	}
-	if (file_verion != String()) {
+	if (!file_verion.is_empty()) {
 		args.push_back("--set-file-version");
 		args.push_back(file_verion);
 	}
-	if (product_version != String()) {
+	if (!product_version.is_empty()) {
 		args.push_back("--set-product-version");
 		args.push_back(product_version);
 	}
-	if (company_name != String()) {
+	if (!company_name.is_empty()) {
 		args.push_back("--set-version-string");
 		args.push_back("CompanyName");
 		args.push_back(company_name);
 	}
-	if (product_name != String()) {
+	if (!product_name.is_empty()) {
 		args.push_back("--set-version-string");
 		args.push_back("ProductName");
 		args.push_back(product_name);
 	}
-	if (file_description != String()) {
+	if (!file_description.is_empty()) {
 		args.push_back("--set-version-string");
 		args.push_back("FileDescription");
 		args.push_back(file_description);
 	}
-	if (copyright != String()) {
+	if (!copyright.is_empty()) {
 		args.push_back("--set-version-string");
 		args.push_back("LegalCopyright");
 		args.push_back(copyright);
 	}
-	if (trademarks != String()) {
+	if (!trademarks.is_empty()) {
 		args.push_back("--set-version-string");
 		args.push_back("LegalTrademarks");
 		args.push_back(trademarks);
@@ -169,20 +169,20 @@ Error EditorExportPlatformWindows::_code_sign(const Ref<EditorExportPreset> &p_p
 
 #ifdef WINDOWS_ENABLED
 	String signtool_path = EditorSettings::get_singleton()->get("export/windows/signtool");
-	if (signtool_path != String() && !FileAccess::exists(signtool_path)) {
+	if (!signtool_path.is_empty() && !FileAccess::exists(signtool_path)) {
 		ERR_PRINT("Could not find signtool executable at " + signtool_path + ", aborting.");
 		return ERR_FILE_NOT_FOUND;
 	}
-	if (signtool_path == String()) {
+	if (signtool_path.is_empty()) {
 		signtool_path = "signtool"; // try to run signtool from PATH
 	}
 #else
 	String signtool_path = EditorSettings::get_singleton()->get("export/windows/osslsigncode");
-	if (signtool_path != String() && !FileAccess::exists(signtool_path)) {
+	if (!signtool_path.is_empty() && !FileAccess::exists(signtool_path)) {
 		ERR_PRINT("Could not find osslsigncode executable at " + signtool_path + ", aborting.");
 		return ERR_FILE_NOT_FOUND;
 	}
-	if (signtool_path == String()) {
+	if (signtool_path.is_empty()) {
 		signtool_path = "osslsigncode"; // try to run signtool from PATH
 	}
 #endif
diff --git a/platform/windows/os_windows.cpp b/platform/windows/os_windows.cpp
index 6a0a4790fc..d2cf9a62ee 100644
--- a/platform/windows/os_windows.cpp
+++ b/platform/windows/os_windows.cpp
@@ -606,7 +606,7 @@ String OS_Windows::get_locale() const {
 		wl++;
 	}
 
-	if (neutral != "")
+	if (!neutral.is_empty())
 		return String(neutral).replace("-", "_");
 
 	return "en";
@@ -757,11 +757,11 @@ String OS_Windows::get_system_dir(SystemDir p_dir, bool p_shared_storage) const
 
 String OS_Windows::get_user_data_dir() const {
 	String appname = get_safe_dir_name(ProjectSettings::get_singleton()->get("application/config/name"));
-	if (appname != "") {
+	if (!appname.is_empty()) {
 		bool use_custom_dir = ProjectSettings::get_singleton()->get("application/config/use_custom_user_dir");
 		if (use_custom_dir) {
 			String custom_dir = get_safe_dir_name(ProjectSettings::get_singleton()->get("application/config/custom_user_dir_name"), true);
-			if (custom_dir == "") {
+			if (custom_dir.is_empty()) {
 				custom_dir = appname;
 			}
 			return get_data_path().plus_file(custom_dir).replace("\\", "/");
diff --git a/scene/2d/animated_sprite_2d.cpp b/scene/2d/animated_sprite_2d.cpp
index 98aa2ad4cc..4fc5c4c21f 100644
--- a/scene/2d/animated_sprite_2d.cpp
+++ b/scene/2d/animated_sprite_2d.cpp
@@ -128,7 +128,7 @@ void AnimatedSprite2D::_validate_property(PropertyInfo &property) const {
 		}
 
 		if (!current_found) {
-			if (property.hint_string == String()) {
+			if (property.hint_string.is_empty()) {
 				property.hint_string = String(animation);
 			} else {
 				property.hint_string = String(animation) + "," + property.hint_string;
diff --git a/scene/3d/lightmap_gi.cpp b/scene/3d/lightmap_gi.cpp
index 1b5d4ad243..910cf3a37d 100644
--- a/scene/3d/lightmap_gi.cpp
+++ b/scene/3d/lightmap_gi.cpp
@@ -614,7 +614,7 @@ void LightmapGI::_gen_new_positions_from_octree(const GenProbesOctree *p_cell, f
 }
 
 LightmapGI::BakeError LightmapGI::bake(Node *p_from_node, String p_image_data_path, Lightmapper::BakeStepFunc p_bake_step, void *p_bake_userdata) {
-	if (p_image_data_path == "") {
+	if (p_image_data_path.is_empty()) {
 		if (get_light_data().is_null()) {
 			return BAKE_ERROR_NO_SAVE_PATH;
 		}
diff --git a/scene/3d/occluder_instance_3d.cpp b/scene/3d/occluder_instance_3d.cpp
index aeac430cd9..ac22239d70 100644
--- a/scene/3d/occluder_instance_3d.cpp
+++ b/scene/3d/occluder_instance_3d.cpp
@@ -291,7 +291,7 @@ void OccluderInstance3D::_bake_node(Node *p_node, PackedVector3Array &r_vertices
 }
 
 OccluderInstance3D::BakeError OccluderInstance3D::bake(Node *p_from_node, String p_occluder_path) {
-	if (p_occluder_path == "") {
+	if (p_occluder_path.is_empty()) {
 		if (get_occluder().is_null()) {
 			return BAKE_ERROR_NO_SAVE_PATH;
 		}
diff --git a/scene/3d/skeleton_3d.cpp b/scene/3d/skeleton_3d.cpp
index 04b5b88ef8..85ef532459 100644
--- a/scene/3d/skeleton_3d.cpp
+++ b/scene/3d/skeleton_3d.cpp
@@ -506,7 +506,7 @@ int Skeleton3D::get_bone_axis_forward_enum(int p_bone) {
 // Skeleton creation api
 
 void Skeleton3D::add_bone(const String &p_name) {
-	ERR_FAIL_COND(p_name == "" || p_name.find(":") != -1 || p_name.find("/") != -1);
+	ERR_FAIL_COND(p_name.is_empty() || p_name.find(":") != -1 || p_name.find("/") != -1);
 
 	for (int i = 0; i < bones.size(); i++) {
 		ERR_FAIL_COND(bones[i].name == p_name);
diff --git a/scene/3d/sprite_3d.cpp b/scene/3d/sprite_3d.cpp
index 3eabc6b562..09f0187147 100644
--- a/scene/3d/sprite_3d.cpp
+++ b/scene/3d/sprite_3d.cpp
@@ -1004,7 +1004,7 @@ void AnimatedSprite3D::_validate_property(PropertyInfo &property) const {
 		}
 
 		if (!current_found) {
-			if (property.hint_string == String()) {
+			if (property.hint_string.is_empty()) {
 				property.hint_string = String(animation);
 			} else {
 				property.hint_string = String(animation) + "," + property.hint_string;
diff --git a/scene/animation/animation_blend_tree.cpp b/scene/animation/animation_blend_tree.cpp
index d6c5d0b51c..8f644face5 100644
--- a/scene/animation/animation_blend_tree.cpp
+++ b/scene/animation/animation_blend_tree.cpp
@@ -57,7 +57,7 @@ void AnimationNodeAnimation::_validate_property(PropertyInfo &property) const {
 			}
 			anims += String(names[i]);
 		}
-		if (anims != String()) {
+		if (!anims.is_empty()) {
 			property.hint = PROPERTY_HINT_ENUM;
 			property.hint_string = anims;
 		}
diff --git a/scene/animation/animation_node_state_machine.cpp b/scene/animation/animation_node_state_machine.cpp
index c8fa8bf395..31a1d4d64c 100644
--- a/scene/animation/animation_node_state_machine.cpp
+++ b/scene/animation/animation_node_state_machine.cpp
@@ -52,7 +52,7 @@ void AnimationNodeStateMachineTransition::set_advance_condition(const StringName
 	String cs = p_condition;
 	ERR_FAIL_COND(cs.find("/") != -1 || cs.find(":") != -1);
 	advance_condition = p_condition;
-	if (cs != String()) {
+	if (!cs.is_empty()) {
 		advance_condition_name = "conditions/" + cs;
 	} else {
 		advance_condition_name = StringName();
diff --git a/scene/animation/animation_player.cpp b/scene/animation/animation_player.cpp
index b9435b6692..d603106696 100644
--- a/scene/animation/animation_player.cpp
+++ b/scene/animation/animation_player.cpp
@@ -1416,7 +1416,7 @@ bool AnimationPlayer::is_playing() const {
 }
 
 void AnimationPlayer::set_current_animation(const String &p_anim) {
-	if (p_anim == "[stop]" || p_anim == "") {
+	if (p_anim == "[stop]" || p_anim.is_empty()) {
 		stop();
 	} else if (!is_playing() || playback.assigned != p_anim) {
 		play(p_anim);
diff --git a/scene/animation/animation_tree.cpp b/scene/animation/animation_tree.cpp
index 57c615a6ab..527946b9de 100644
--- a/scene/animation/animation_tree.cpp
+++ b/scene/animation/animation_tree.cpp
@@ -138,7 +138,7 @@ real_t AnimationNode::_pre_process(const StringName &p_base_path, AnimationNode
 void AnimationNode::make_invalid(const String &p_reason) {
 	ERR_FAIL_COND(!state);
 	state->valid = false;
-	if (state->invalid_reasons != String()) {
+	if (!state->invalid_reasons.is_empty()) {
 		state->invalid_reasons += "\n";
 	}
 	state->invalid_reasons += String::utf8("•  ") + p_reason;
diff --git a/scene/debugger/scene_debugger.cpp b/scene/debugger/scene_debugger.cpp
index 56c04b32e3..e1594384d5 100644
--- a/scene/debugger/scene_debugger.cpp
+++ b/scene/debugger/scene_debugger.cpp
@@ -226,7 +226,7 @@ void SceneDebugger::add_to_cache(const String &p_filename, Node *p_node) {
 		return;
 	}
 
-	if (EngineDebugger::get_script_debugger() && p_filename != String()) {
+	if (EngineDebugger::get_script_debugger() && !p_filename.is_empty()) {
 		debugger->live_scene_edit_cache[p_filename].insert(p_node);
 	}
 }
diff --git a/scene/gui/base_button.cpp b/scene/gui/base_button.cpp
index 9f712ed478..f4de48689e 100644
--- a/scene/gui/base_button.cpp
+++ b/scene/gui/base_button.cpp
@@ -355,7 +355,7 @@ String BaseButton::get_tooltip(const Point2 &p_pos) const {
 	String tooltip = Control::get_tooltip(p_pos);
 	if (shortcut_in_tooltip && shortcut.is_valid() && shortcut->has_valid_event()) {
 		String text = shortcut->get_name() + " (" + shortcut->get_as_text() + ")";
-		if (tooltip != String() && shortcut->get_name().nocasecmp_to(tooltip) != 0) {
+		if (!tooltip.is_empty() && shortcut->get_name().nocasecmp_to(tooltip) != 0) {
 			text += "\n" + tooltip;
 		}
 		tooltip = text;
diff --git a/scene/gui/button.cpp b/scene/gui/button.cpp
index 655fc783d7..8bb41e7abf 100644
--- a/scene/gui/button.cpp
+++ b/scene/gui/button.cpp
@@ -52,7 +52,7 @@ Size2 Button::get_minimum_size() const {
 
 			if (icon_alignment != HORIZONTAL_ALIGNMENT_CENTER) {
 				minsize.width += _icon->get_width();
-				if (xl_text != "") {
+				if (!xl_text.is_empty()) {
 					minsize.width += get_theme_constant(SNAME("hseparation"));
 				}
 			} else {
@@ -359,7 +359,7 @@ void Button::_shape() {
 	} else {
 		text_buf->set_direction((TextServer::Direction)text_direction);
 	}
-	text_buf->add_string(xl_text, font, font_size, opentype_features, (language != "") ? language : TranslationServer::get_singleton()->get_tool_locale());
+	text_buf->add_string(xl_text, font, font_size, opentype_features, (!language.is_empty()) ? language : TranslationServer::get_singleton()->get_tool_locale());
 }
 
 void Button::set_text(const String &p_text) {
diff --git a/scene/gui/code_edit.cpp b/scene/gui/code_edit.cpp
index 23ac36c5eb..ba37d51e24 100644
--- a/scene/gui/code_edit.cpp
+++ b/scene/gui/code_edit.cpp
@@ -189,7 +189,7 @@ void CodeEdit::_notification(int p_what) {
 			}
 
 			/* Code hint */
-			if (caret_visible && code_hint != "" && (!code_completion_active || (code_completion_below != code_hint_draw_below))) {
+			if (caret_visible && !code_hint.is_empty() && (!code_completion_active || (code_completion_below != code_hint_draw_below))) {
 				const int font_height = font->get_height(font_size);
 				Ref<StyleBox> sb = get_theme_stylebox(SNAME("panel"), SNAME("TooltipPanel"));
 				Color font_color = get_theme_color(SNAME("font_color"), SNAME("TooltipLabel"));
@@ -315,7 +315,7 @@ void CodeEdit::gui_input(const Ref<InputEvent> &p_gui_input) {
 			}
 		} else {
 			if (mb->get_button_index() == MouseButton::LEFT) {
-				if (mb->is_command_pressed() && symbol_lookup_word != String()) {
+				if (mb->is_command_pressed() && !symbol_lookup_word.is_empty()) {
 					Vector2i mpos = mb->get_position();
 					if (is_layout_rtl()) {
 						mpos.x = get_size().x - mpos.x;
@@ -530,7 +530,7 @@ void CodeEdit::gui_input(const Ref<InputEvent> &p_gui_input) {
 
 /* General overrides */
 Control::CursorShape CodeEdit::get_cursor_shape(const Point2 &p_pos) const {
-	if (symbol_lookup_word != String()) {
+	if (!symbol_lookup_word.is_empty()) {
 		return CURSOR_POINTING_HAND;
 	}
 
@@ -2597,7 +2597,7 @@ void CodeEdit::_add_delimiter(const String &p_start_key, const String &p_end_key
 	delimiter.type = p_type;
 	delimiter.start_key = p_start_key;
 	delimiter.end_key = p_end_key;
-	delimiter.line_only = p_line_only || p_end_key == "";
+	delimiter.line_only = p_line_only || p_end_key.is_empty();
 	delimiters.insert(at, delimiter);
 	if (!setting_delimiters) {
 		delimiter_cache.clear();
@@ -2647,7 +2647,7 @@ void CodeEdit::_set_delimiters(const TypedArray<String> &p_delimiters, Delimiter
 		const String start_key = key.get_slice(" ", 0);
 		const String end_key = key.get_slice_count(" ") > 1 ? key.get_slice(" ", 1) : String();
 
-		_add_delimiter(start_key, end_key, end_key == "", p_type);
+		_add_delimiter(start_key, end_key, end_key.is_empty(), p_type);
 	}
 	setting_delimiters = false;
 	_update_delimiter_cache();
diff --git a/scene/gui/control.cpp b/scene/gui/control.cpp
index 3a926b3fb5..249eb95ed8 100644
--- a/scene/gui/control.cpp
+++ b/scene/gui/control.cpp
@@ -2791,7 +2791,7 @@ void Control::get_argument_options(const StringName &p_function, int p_idx, List
 TypedArray<String> Control::get_configuration_warnings() const {
 	TypedArray<String> warnings = Node::get_configuration_warnings();
 
-	if (data.mouse_filter == MOUSE_FILTER_IGNORE && data.tooltip != "") {
+	if (data.mouse_filter == MOUSE_FILTER_IGNORE && !data.tooltip.is_empty()) {
 		warnings.push_back(TTR("The Hint Tooltip won't be displayed as the control's Mouse Filter is set to \"Ignore\". To solve this, set the Mouse Filter to \"Stop\" or \"Pass\"."));
 	}
 
diff --git a/scene/gui/dialogs.cpp b/scene/gui/dialogs.cpp
index f66d3f6835..f1725e57ea 100644
--- a/scene/gui/dialogs.cpp
+++ b/scene/gui/dialogs.cpp
@@ -242,7 +242,7 @@ Button *AcceptDialog::add_button(const String &p_text, bool p_right, const Strin
 		hbc->add_spacer(true);
 	}
 
-	if (p_action != "") {
+	if (!p_action.is_empty()) {
 		button->connect("pressed", callable_mp(this, &AcceptDialog::_custom_action), varray(p_action));
 	}
 
@@ -251,7 +251,7 @@ Button *AcceptDialog::add_button(const String &p_text, bool p_right, const Strin
 
 Button *AcceptDialog::add_cancel_button(const String &p_cancel) {
 	String c = p_cancel;
-	if (p_cancel == "") {
+	if (p_cancel.is_empty()) {
 		c = TTRC("Cancel");
 	}
 	Button *b = swap_cancel_ok ? add_button(c, true) : add_button(c);
diff --git a/scene/gui/graph_node.cpp b/scene/gui/graph_node.cpp
index 3177911a70..7a7b35585e 100644
--- a/scene/gui/graph_node.cpp
+++ b/scene/gui/graph_node.cpp
@@ -458,7 +458,7 @@ void GraphNode::_shape() {
 	} else {
 		title_buf->set_direction((TextServer::Direction)text_direction);
 	}
-	title_buf->add_string(title, font, font_size, opentype_features, (language != "") ? language : TranslationServer::get_singleton()->get_tool_locale());
+	title_buf->add_string(title, font, font_size, opentype_features, (!language.is_empty()) ? language : TranslationServer::get_singleton()->get_tool_locale());
 }
 
 #ifdef TOOLS_ENABLED
diff --git a/scene/gui/item_list.cpp b/scene/gui/item_list.cpp
index a3235dd382..6deb39b9e2 100644
--- a/scene/gui/item_list.cpp
+++ b/scene/gui/item_list.cpp
@@ -43,7 +43,7 @@ void ItemList::_shape(int p_idx) {
 	} else {
 		item.text_buf->set_direction((TextServer::Direction)item.text_direction);
 	}
-	item.text_buf->add_string(item.text, get_theme_font(SNAME("font")), get_theme_font_size(SNAME("font_size")), item.opentype_features, (item.language != "") ? item.language : TranslationServer::get_singleton()->get_tool_locale());
+	item.text_buf->add_string(item.text, get_theme_font(SNAME("font")), get_theme_font_size(SNAME("font_size")), item.opentype_features, (!item.language.is_empty()) ? item.language : TranslationServer::get_singleton()->get_tool_locale());
 	if (icon_mode == ICON_MODE_TOP && max_text_lines > 0) {
 		item.text_buf->set_flags(TextServer::BREAK_MANDATORY | TextServer::BREAK_WORD_BOUND | TextServer::BREAK_GRAPHEME_BOUND);
 	} else {
@@ -653,7 +653,7 @@ void ItemList::gui_input(const Ref<InputEvent> &p_event) {
 
 	if (p_event->is_pressed() && items.size() > 0) {
 		if (p_event->is_action("ui_up")) {
-			if (search_string != "") {
+			if (!search_string.is_empty()) {
 				uint64_t now = OS::get_singleton()->get_ticks_msec();
 				uint64_t diff = now - search_time_msec;
 
@@ -683,7 +683,7 @@ void ItemList::gui_input(const Ref<InputEvent> &p_event) {
 				accept_event();
 			}
 		} else if (p_event->is_action("ui_down")) {
-			if (search_string != "") {
+			if (!search_string.is_empty()) {
 				uint64_t now = OS::get_singleton()->get_ticks_msec();
 				uint64_t diff = now - search_time_msec;
 
@@ -920,7 +920,7 @@ void ItemList::_notification(int p_what) {
 						minsize = items[i].get_icon_size() * icon_scale;
 					}
 
-					if (items[i].text != "") {
+					if (!items[i].text.is_empty()) {
 						if (icon_mode == ICON_MODE_TOP) {
 							minsize.y += icon_margin;
 						} else {
@@ -929,7 +929,7 @@ void ItemList::_notification(int p_what) {
 					}
 				}
 
-				if (items[i].text != "") {
+				if (!items[i].text.is_empty()) {
 					int max_width = -1;
 					if (fixed_column_width) {
 						max_width = fixed_column_width;
@@ -1188,7 +1188,7 @@ void ItemList::_notification(int p_what) {
 				draw_texture(items[i].tag_icon, draw_pos + base_ofs);
 			}
 
-			if (items[i].text != "") {
+			if (!items[i].text.is_empty()) {
 				int max_len = -1;
 
 				Vector2 size2 = items[i].text_buf->get_size();
@@ -1360,10 +1360,10 @@ String ItemList::get_tooltip(const Point2 &p_pos) const {
 		if (!items[closest].tooltip_enabled) {
 			return "";
 		}
-		if (items[closest].tooltip != "") {
+		if (!items[closest].tooltip.is_empty()) {
 			return items[closest].tooltip;
 		}
-		if (items[closest].text != "") {
+		if (!items[closest].text.is_empty()) {
 			return items[closest].text;
 		}
 	}
diff --git a/scene/gui/label.cpp b/scene/gui/label.cpp
index bd3a2c2e53..0a09d87509 100644
--- a/scene/gui/label.cpp
+++ b/scene/gui/label.cpp
@@ -96,7 +96,7 @@ void Label::_shape() {
 		if (visible_chars >= 0) {
 			text = text.substr(0, visible_chars);
 		}
-		TS->shaped_text_add_string(text_rid, text, font->get_rids(), font_size, opentype_features, (language != "") ? language : TranslationServer::get_singleton()->get_tool_locale());
+		TS->shaped_text_add_string(text_rid, text, font->get_rids(), font_size, opentype_features, (!language.is_empty()) ? language : TranslationServer::get_singleton()->get_tool_locale());
 		TS->shaped_text_set_bidi_override(text_rid, structured_text_parser(st_parser, st_args, text));
 		dirty = false;
 		lines_dirty = true;
diff --git a/scene/gui/line_edit.cpp b/scene/gui/line_edit.cpp
index 9df2f7309c..810781995e 100644
--- a/scene/gui/line_edit.cpp
+++ b/scene/gui/line_edit.cpp
@@ -1017,7 +1017,7 @@ void LineEdit::paste_text() {
 	// Strip escape characters like \n and \t as they can't be displayed on LineEdit.
 	String paste_buffer = DisplayServer::get_singleton()->clipboard_get().strip_escapes();
 
-	if (paste_buffer != "") {
+	if (!paste_buffer.is_empty()) {
 		int prev_len = text.length();
 		if (selection.enabled) {
 			selection_delete();
@@ -2078,7 +2078,7 @@ void LineEdit::_shape() {
 	const Ref<Font> &font = get_theme_font(SNAME("font"));
 	int font_size = get_theme_font_size(SNAME("font_size"));
 	ERR_FAIL_COND(font.is_null());
-	TS->shaped_text_add_string(text_rid, t, font->get_rids(), font_size, opentype_features, (language != "") ? language : TranslationServer::get_singleton()->get_tool_locale());
+	TS->shaped_text_add_string(text_rid, t, font->get_rids(), font_size, opentype_features, (!language.is_empty()) ? language : TranslationServer::get_singleton()->get_tool_locale());
 	TS->shaped_text_set_bidi_override(text_rid, structured_text_parser(st_parser, st_args, t));
 
 	full_width = TS->shaped_text_get_size(text_rid).x;
diff --git a/scene/gui/link_button.cpp b/scene/gui/link_button.cpp
index 9856247b7c..b59f4fb7d4 100644
--- a/scene/gui/link_button.cpp
+++ b/scene/gui/link_button.cpp
@@ -42,7 +42,7 @@ void LinkButton::_shape() {
 		text_buf->set_direction((TextServer::Direction)text_direction);
 	}
 	TS->shaped_text_set_bidi_override(text_buf->get_rid(), structured_text_parser(st_parser, st_args, xl_text));
-	text_buf->add_string(xl_text, font, font_size, opentype_features, (language != "") ? language : TranslationServer::get_singleton()->get_tool_locale());
+	text_buf->add_string(xl_text, font, font_size, opentype_features, (!language.is_empty()) ? language : TranslationServer::get_singleton()->get_tool_locale());
 }
 
 void LinkButton::set_text(const String &p_text) {
diff --git a/scene/gui/popup_menu.cpp b/scene/gui/popup_menu.cpp
index 4e16111f99..c2f912fc96 100644
--- a/scene/gui/popup_menu.cpp
+++ b/scene/gui/popup_menu.cpp
@@ -80,7 +80,7 @@ Size2 PopupMenu::_get_contents_minimum_size() const {
 			accel_max_w = MAX(accel_w, accel_max_w);
 		}
 
-		if (items[i].submenu != "") {
+		if (!items[i].submenu.is_empty()) {
 			size.width += get_theme_icon(SNAME("submenu"))->get_width();
 		}
 
@@ -326,13 +326,13 @@ void PopupMenu::gui_input(const Ref<InputEvent> &p_event) {
 			set_input_as_handled();
 		}
 	} else if (p_event->is_action("ui_right") && p_event->is_pressed()) {
-		if (mouse_over >= 0 && mouse_over < items.size() && !items[mouse_over].separator && items[mouse_over].submenu != "" && submenu_over != mouse_over) {
+		if (mouse_over >= 0 && mouse_over < items.size() && !!items[mouse_over].separator && items[mouse_over].submenu.is_empty() && submenu_over != mouse_over) {
 			_activate_submenu(mouse_over);
 			set_input_as_handled();
 		}
 	} else if (p_event->is_action("ui_accept") && p_event->is_pressed()) {
 		if (mouse_over >= 0 && mouse_over < items.size() && !items[mouse_over].separator) {
-			if (items[mouse_over].submenu != "" && submenu_over != mouse_over) {
+			if (!items[mouse_over].submenu.is_empty() && submenu_over != mouse_over) {
 				_activate_submenu(mouse_over);
 			} else {
 				activate_item(mouse_over);
@@ -387,7 +387,7 @@ void PopupMenu::gui_input(const Ref<InputEvent> &p_event) {
 					return;
 				}
 
-				if (items[over].submenu != "") {
+				if (!items[over].submenu.is_empty()) {
 					_activate_submenu(over);
 					return;
 				}
@@ -419,7 +419,7 @@ void PopupMenu::gui_input(const Ref<InputEvent> &p_event) {
 			return;
 		}
 
-		if (items[over].submenu != "" && submenu_over != over) {
+		if (!items[over].submenu.is_empty() && submenu_over != over) {
 			submenu_over = over;
 			submenu_timer->start();
 		}
@@ -558,7 +558,7 @@ void PopupMenu::_draw_items() {
 		if (items[i].separator) {
 			int sep_h = separator->get_center_size().height + separator->get_minimum_size().height;
 			int sep_ofs = Math::floor((h - sep_h) / 2.0);
-			if (text != String()) {
+			if (!text.is_empty()) {
 				int text_size = items[i].text_buf->get_size().width;
 				int text_center = display_width / 2;
 				int text_left = text_center - text_size / 2;
@@ -599,7 +599,7 @@ void PopupMenu::_draw_items() {
 		}
 
 		// Submenu arrow on right hand side
-		if (items[i].submenu != "") {
+		if (!items[i].submenu.is_empty()) {
 			if (rtl) {
 				submenu->draw(ci, Point2(scroll_width + style->get_margin(SIDE_LEFT) + item_end_padding, item_ofs.y + Math::floor(h - submenu->get_height()) / 2), icon_color);
 			} else {
@@ -611,7 +611,7 @@ void PopupMenu::_draw_items() {
 		Color font_outline_color = get_theme_color(SNAME("font_outline_color"));
 		int outline_size = get_theme_constant(SNAME("outline_size"));
 		if (items[i].separator) {
-			if (text != String()) {
+			if (!text.is_empty()) {
 				int center = (display_width - items[i].text_buf->get_size().width) / 2;
 				Vector2 text_pos = Point2(center, item_ofs.y + Math::floor((h - items[i].text_buf->get_size().y) / 2.0));
 				if (outline_size > 0 && font_outline_color.a > 0) {
@@ -701,7 +701,7 @@ void PopupMenu::_shape_item(int p_item) {
 		} else {
 			items.write[p_item].text_buf->set_direction((TextServer::Direction)items[p_item].text_direction);
 		}
-		items.write[p_item].text_buf->add_string(items.write[p_item].xl_text, font, font_size, items[p_item].opentype_features, (items[p_item].language != "") ? items[p_item].language : TranslationServer::get_singleton()->get_tool_locale());
+		items.write[p_item].text_buf->add_string(items.write[p_item].xl_text, font, font_size, items[p_item].opentype_features, !items[p_item].language.is_empty() ? items[p_item].language : TranslationServer::get_singleton()->get_tool_locale());
 
 		items.write[p_item].accel_text_buf->clear();
 		items.write[p_item].accel_text_buf->set_direction(is_layout_rtl() ? TextServer::DIRECTION_RTL : TextServer::DIRECTION_LTR);
@@ -736,7 +736,7 @@ void PopupMenu::_notification(int p_what) {
 			grab_focus();
 		} break;
 		case NOTIFICATION_WM_MOUSE_EXIT: {
-			if (mouse_over >= 0 && (items[mouse_over].submenu == "" || submenu_over != -1)) {
+			if (mouse_over >= 0 && (items[mouse_over].submenu.is_empty() || submenu_over != -1)) {
 				mouse_over = -1;
 				control->update();
 			}
@@ -769,7 +769,7 @@ void PopupMenu::_notification(int p_what) {
 				}
 
 				for (int i = 0; i < items.size(); i++) {
-					if (items[i].submenu == "") {
+					if (items[i].submenu.is_empty()) {
 						continue;
 					}
 
@@ -1323,7 +1323,7 @@ bool PopupMenu::activate_item_by_event(const Ref<InputEvent> &p_event, bool p_fo
 			return true;
 		}
 
-		if (items[i].submenu != "") {
+		if (!items[i].submenu.is_empty()) {
 			Node *n = get_node(items[i].submenu);
 			if (!n) {
 				continue;
@@ -1412,7 +1412,7 @@ void PopupMenu::add_separator(const String &p_text, int p_id) {
 	Item sep;
 	sep.separator = true;
 	sep.id = p_id;
-	if (p_text != String()) {
+	if (!p_text.is_empty()) {
 		sep.text = p_text;
 		sep.xl_text = atr(p_text);
 	}
@@ -1510,7 +1510,7 @@ void PopupMenu::set_parent_rect(const Rect2 &p_rect) {
 
 void PopupMenu::get_translatable_strings(List<String> *p_strings) const {
 	for (int i = 0; i < items.size(); i++) {
-		if (items[i].xl_text != "") {
+		if (!items[i].xl_text.is_empty()) {
 			p_strings->push_back(items[i].xl_text);
 		}
 	}
diff --git a/scene/gui/rich_text_label.cpp b/scene/gui/rich_text_label.cpp
index c69565c2f7..7ed8056826 100644
--- a/scene/gui/rich_text_label.cpp
+++ b/scene/gui/rich_text_label.cpp
@@ -670,7 +670,7 @@ int RichTextLabel::_draw_line(ItemFrame *p_frame, int p_line, const Vector2 &p_o
 			prefix = segment + prefix;
 		}
 	}
-	if (prefix != "") {
+	if (!prefix.is_empty()) {
 		Ref<Font> font = _find_font(l.from);
 		if (font.is_null()) {
 			font = get_theme_font(SNAME("normal_font"));
@@ -1423,7 +1423,7 @@ void RichTextLabel::_notification(int p_what) {
 		} break;
 		case NOTIFICATION_THEME_CHANGED:
 		case NOTIFICATION_ENTER_TREE: {
-			if (text != "") {
+			if (!text.is_empty()) {
 				set_text(text);
 			}
 
@@ -3853,7 +3853,7 @@ String RichTextLabel::get_selected_text() const {
 void RichTextLabel::selection_copy() {
 	String text = get_selected_text();
 
-	if (text != "") {
+	if (!text.is_empty()) {
 		DisplayServer::get_singleton()->clipboard_set(text);
 	}
 }
@@ -4005,7 +4005,7 @@ float RichTextLabel::get_percent_visible() const {
 
 void RichTextLabel::set_effects(Array p_effects) {
 	custom_effects = p_effects;
-	if ((text != "") && use_bbcode) {
+	if ((!text.is_empty()) && use_bbcode) {
 		parse_bbcode(text);
 	}
 }
@@ -4020,7 +4020,7 @@ void RichTextLabel::install_effect(const Variant effect) {
 
 	if (rteffect.is_valid()) {
 		custom_effects.push_back(effect);
-		if ((text != "") && use_bbcode) {
+		if ((!text.is_empty()) && use_bbcode) {
 			parse_bbcode(text);
 		}
 	}
diff --git a/scene/gui/spin_box.cpp b/scene/gui/spin_box.cpp
index c4a1d8e5a6..8d6315d085 100644
--- a/scene/gui/spin_box.cpp
+++ b/scene/gui/spin_box.cpp
@@ -41,10 +41,10 @@ Size2 SpinBox::get_minimum_size() const {
 
 void SpinBox::_value_changed(double) {
 	String value = TS->format_number(String::num(get_value(), Math::range_step_decimals(get_step())));
-	if (prefix != "") {
+	if (!prefix.is_empty()) {
 		value = prefix + " " + value;
 	}
-	if (suffix != "") {
+	if (!suffix.is_empty()) {
 		value += " " + suffix;
 	}
 	line_edit->set_text(value);
diff --git a/scene/gui/tab_bar.cpp b/scene/gui/tab_bar.cpp
index dd410e2472..3d88c117e7 100644
--- a/scene/gui/tab_bar.cpp
+++ b/scene/gui/tab_bar.cpp
@@ -50,7 +50,7 @@ Size2 TabBar::get_minimum_size() const {
 		Ref<Texture2D> tex = tabs[i].icon;
 		if (tex.is_valid()) {
 			ms.height = MAX(ms.height, tex->get_size().height);
-			if (tabs[i].text != "") {
+			if (!tabs[i].text.is_empty()) {
 				ms.width += get_theme_constant(SNAME("hseparation"));
 			}
 		}
@@ -270,7 +270,7 @@ void TabBar::_shape(int p_tab) {
 		tabs.write[p_tab].text_buf->set_direction((TextServer::Direction)tabs[p_tab].text_direction);
 	}
 
-	tabs.write[p_tab].text_buf->add_string(tabs.write[p_tab].xl_text, font, font_size, tabs[p_tab].opentype_features, (tabs[p_tab].language != "") ? tabs[p_tab].language : TranslationServer::get_singleton()->get_tool_locale());
+	tabs.write[p_tab].text_buf->add_string(tabs.write[p_tab].xl_text, font, font_size, tabs[p_tab].opentype_features, !tabs[p_tab].language.is_empty() ? tabs[p_tab].language : TranslationServer::get_singleton()->get_tool_locale());
 }
 
 void TabBar::_notification(int p_what) {
@@ -385,7 +385,7 @@ void TabBar::_notification(int p_what) {
 					} else {
 						icon->draw(ci, Point2i(w, sb->get_margin(SIDE_TOP) + ((sb_rect.size.y - sb_ms.y) - icon->get_height()) / 2));
 					}
-					if (tabs[i].text != "") {
+					if (!tabs[i].text.is_empty()) {
 						w += icon->get_width() + get_theme_constant(SNAME("hseparation"));
 					}
 				}
@@ -980,7 +980,7 @@ int TabBar::get_tab_width(int p_idx) const {
 	Ref<Texture2D> tex = tabs[p_idx].icon;
 	if (tex.is_valid()) {
 		x += tex->get_width();
-		if (tabs[p_idx].text != "") {
+		if (!tabs[p_idx].text.is_empty()) {
 			x += get_theme_constant(SNAME("hseparation"));
 		}
 	}
diff --git a/scene/gui/tab_container.cpp b/scene/gui/tab_container.cpp
index 23e8f2bce8..fd5df5c93b 100644
--- a/scene/gui/tab_container.cpp
+++ b/scene/gui/tab_container.cpp
@@ -561,7 +561,7 @@ void TabContainer::_draw_tab(Ref<StyleBox> &p_tab_style, Color &p_font_color, in
 		if (icon.is_valid()) {
 			int y = y_center - (icon->get_height() / 2);
 			icon->draw(canvas, Point2i(x_content, y));
-			if (text != "") {
+			if (!text.is_empty()) {
 				x_content += icon->get_width() + icon_text_distance;
 			}
 		}
@@ -656,7 +656,7 @@ int TabContainer::_get_tab_width(int p_index) const {
 		Ref<Texture2D> icon = control->get_meta("_tab_icon");
 		if (icon.is_valid()) {
 			width += icon->get_width();
-			if (text != "") {
+			if (!text.is_empty()) {
 				width += get_theme_constant(SNAME("icon_separation"));
 			}
 		}
@@ -1108,7 +1108,7 @@ void TabContainer::get_translatable_strings(List<String> *p_strings) const {
 
 		String name = c->get_meta("_tab_name");
 
-		if (name != "") {
+		if (!name.is_empty()) {
 			p_strings->push_back(name);
 		}
 	}
diff --git a/scene/gui/text_edit.cpp b/scene/gui/text_edit.cpp
index c54b4dda00..2986be28c2 100644
--- a/scene/gui/text_edit.cpp
+++ b/scene/gui/text_edit.cpp
@@ -601,7 +601,7 @@ void TextEdit::_notification(int p_what) {
 			String highlighted_text = get_selected_text();
 
 			// Check if highlighted words contain only whitespaces (tabs or spaces).
-			bool only_whitespaces_highlighted = highlighted_text.strip_edges() == String();
+			bool only_whitespaces_highlighted = highlighted_text.strip_edges().is_empty();
 
 			const int caret_wrap_index = get_caret_wrap_index();
 
@@ -916,7 +916,7 @@ void TextEdit::_notification(int p_what) {
 							switch (gutter.type) {
 								case GUTTER_TYPE_STRING: {
 									const String &text = get_line_gutter_text(line, g);
-									if (text == "") {
+									if (text.is_empty()) {
 										break;
 									}
 
@@ -2428,7 +2428,7 @@ void TextEdit::_update_caches() {
 	} else {
 		dir = (TextServer::Direction)text_direction;
 	}
-	text.set_direction_and_language(dir, (language != "") ? language : TranslationServer::get_singleton()->get_tool_locale());
+	text.set_direction_and_language(dir, (!language.is_empty()) ? language : TranslationServer::get_singleton()->get_tool_locale());
 	text.set_font_features(opentype_features);
 	text.set_draw_control_chars(draw_control_chars);
 	text.set_font(font);
@@ -2611,7 +2611,7 @@ void TextEdit::set_text_direction(Control::TextDirection p_text_direction) {
 		} else {
 			dir = (TextServer::Direction)text_direction;
 		}
-		text.set_direction_and_language(dir, (language != "") ? language : TranslationServer::get_singleton()->get_tool_locale());
+		text.set_direction_and_language(dir, (!language.is_empty()) ? language : TranslationServer::get_singleton()->get_tool_locale());
 		text.invalidate_all();
 
 		if (menu_dir) {
@@ -2662,7 +2662,7 @@ void TextEdit::set_language(const String &p_language) {
 		} else {
 			dir = (TextServer::Direction)text_direction;
 		}
-		text.set_direction_and_language(dir, (language != "") ? language : TranslationServer::get_singleton()->get_tool_locale());
+		text.set_direction_and_language(dir, (!language.is_empty()) ? language : TranslationServer::get_singleton()->get_tool_locale());
 		text.invalidate_all();
 		update();
 	}
diff --git a/scene/gui/tree.cpp b/scene/gui/tree.cpp
index d2d4167a25..5a6ac7c0d2 100644
--- a/scene/gui/tree.cpp
+++ b/scene/gui/tree.cpp
@@ -1536,7 +1536,7 @@ void Tree::update_column(int p_col) {
 		columns.write[p_col].text_buf->set_direction((TextServer::Direction)columns[p_col].text_direction);
 	}
 
-	columns.write[p_col].text_buf->add_string(columns[p_col].title, cache.font, cache.font_size, columns[p_col].opentype_features, (columns[p_col].language != "") ? columns[p_col].language : TranslationServer::get_singleton()->get_tool_locale());
+	columns.write[p_col].text_buf->add_string(columns[p_col].title, cache.font, cache.font_size, columns[p_col].opentype_features, !columns[p_col].language.is_empty() ? columns[p_col].language : TranslationServer::get_singleton()->get_tool_locale());
 }
 
 void Tree::update_item_cell(TreeItem *p_item, int p_col) {
@@ -1544,7 +1544,7 @@ void Tree::update_item_cell(TreeItem *p_item, int p_col) {
 
 	p_item->cells.write[p_col].text_buf->clear();
 	if (p_item->cells[p_col].mode == TreeItem::CELL_MODE_RANGE) {
-		if (p_item->cells[p_col].text != "") {
+		if (!p_item->cells[p_col].text.is_empty()) {
 			if (!p_item->cells[p_col].editable) {
 				return;
 			}
@@ -1571,7 +1571,7 @@ void Tree::update_item_cell(TreeItem *p_item, int p_col) {
 		valtext = p_item->cells[p_col].text;
 	}
 
-	if (p_item->cells[p_col].suffix != String()) {
+	if (!p_item->cells[p_col].suffix.is_empty()) {
 		valtext += " " + p_item->cells[p_col].suffix;
 	}
 
@@ -1594,7 +1594,7 @@ void Tree::update_item_cell(TreeItem *p_item, int p_col) {
 	} else {
 		font_size = cache.font_size;
 	}
-	p_item->cells.write[p_col].text_buf->add_string(valtext, font, font_size, p_item->cells[p_col].opentype_features, (p_item->cells[p_col].language != "") ? p_item->cells[p_col].language : TranslationServer::get_singleton()->get_tool_locale());
+	p_item->cells.write[p_col].text_buf->add_string(valtext, font, font_size, p_item->cells[p_col].opentype_features, !p_item->cells[p_col].language.is_empty() ? p_item->cells[p_col].language : TranslationServer::get_singleton()->get_tool_locale());
 	TS->shaped_text_set_bidi_override(p_item->cells[p_col].text_buf->get_rid(), structured_text_parser(p_item->cells[p_col].st_parser, p_item->cells[p_col].st_args, valtext));
 	p_item->cells.write[p_col].dirty = false;
 }
@@ -1660,7 +1660,7 @@ int Tree::draw_item(const Point2i &p_pos, const Point2 &p_draw_ofs, const Size2
 
 			if (p_item->cells[i].expand_right) {
 				int plus = 1;
-				while (i + plus < columns.size() && !p_item->cells[i + plus].editable && p_item->cells[i + plus].mode == TreeItem::CELL_MODE_STRING && p_item->cells[i + plus].text == "" && p_item->cells[i + plus].icon.is_null()) {
+				while (i + plus < columns.size() && !p_item->cells[i + plus].editable && p_item->cells[i + plus].mode == TreeItem::CELL_MODE_STRING && p_item->cells[i + plus].text.is_empty() && p_item->cells[i + plus].icon.is_null()) {
 					w += get_column_width(i + plus);
 					plus++;
 					skip2++;
@@ -1857,7 +1857,7 @@ int Tree::draw_item(const Point2i &p_pos, const Point2 &p_draw_ofs, const Size2
 
 				} break;
 				case TreeItem::CELL_MODE_RANGE: {
-					if (p_item->cells[i].text != "") {
+					if (!p_item->cells[i].text.is_empty()) {
 						if (!p_item->cells[i].editable) {
 							break;
 						}
@@ -2337,7 +2337,7 @@ int Tree::propagate_mouse_event(const Point2i &p_pos, int x_ofs, int y_ofs, int
 
 			if (p_item->cells[i].expand_right) {
 				int plus = 1;
-				while (i + plus < columns.size() && !p_item->cells[i + plus].editable && p_item->cells[i + plus].mode == TreeItem::CELL_MODE_STRING && p_item->cells[i + plus].text == "" && p_item->cells[i + plus].icon.is_null()) {
+				while (i + plus < columns.size() && !p_item->cells[i + plus].editable && p_item->cells[i + plus].mode == TreeItem::CELL_MODE_STRING && p_item->cells[i + plus].text.is_empty() && p_item->cells[i + plus].icon.is_null()) {
 					col_width += cache.hseparation;
 					col_width += get_column_width(i + plus);
 					plus++;
@@ -2520,7 +2520,7 @@ int Tree::propagate_mouse_event(const Point2i &p_pos, int x_ofs, int y_ofs, int
 
 			} break;
 			case TreeItem::CELL_MODE_RANGE: {
-				if (c.text != "") {
+				if (!c.text.is_empty()) {
 					//if (x >= (get_column_width(col)-item_h/2)) {
 					popup_menu->clear();
 					for (int i = 0; i < c.text.get_slice_count(","); i++) {
@@ -3430,7 +3430,7 @@ bool Tree::edit_selected() {
 		item_edited(col, s);
 
 		return true;
-	} else if (c.mode == TreeItem::CELL_MODE_RANGE && c.text != "") {
+	} else if (c.mode == TreeItem::CELL_MODE_RANGE && !c.text.is_empty()) {
 		popup_menu->clear();
 		for (int i = 0; i < c.text.get_slice_count(","); i++) {
 			String s2 = c.text.get_slicec(',', i);
@@ -4679,7 +4679,7 @@ String Tree::get_tooltip(const Point2 &p_pos) const {
 				Size2 size = b->get_size() + cache.button_pressed->get_minimum_size();
 				if (pos.x > col_width - size.width) {
 					String tooltip = c.buttons[j].tooltip;
-					if (tooltip != "") {
+					if (!tooltip.is_empty()) {
 						return tooltip;
 					}
 				}
diff --git a/scene/main/http_request.cpp b/scene/main/http_request.cpp
index a4fcc04e20..4797729871 100644
--- a/scene/main/http_request.cpp
+++ b/scene/main/http_request.cpp
@@ -243,7 +243,7 @@ bool HTTPRequest::_handle_response(bool *ret_value) {
 			}
 		}
 
-		if (new_request != "") {
+		if (!new_request.is_empty()) {
 			// Process redirect
 			client->close();
 			int new_redirs = redirections + 1; // Because _request() will clear it
@@ -363,7 +363,7 @@ bool HTTPRequest::_update_connection() {
 					return true;
 				}
 
-				if (download_to_file != String()) {
+				if (!download_to_file.is_empty()) {
 					file = FileAccess::open(download_to_file, FileAccess::WRITE);
 					if (!file) {
 						call_deferred(SNAME("_request_done"), RESULT_DOWNLOAD_FILE_CANT_OPEN, response_code, response_headers, PackedByteArray());
diff --git a/scene/main/node.cpp b/scene/main/node.cpp
index 0d646ff2a9..87f77ed4bd 100644
--- a/scene/main/node.cpp
+++ b/scene/main/node.cpp
@@ -892,7 +892,7 @@ void Node::_set_name_nocheck(const StringName &p_name) {
 void Node::set_name(const String &p_name) {
 	String name = p_name.validate_node_name();
 
-	ERR_FAIL_COND(name == "");
+	ERR_FAIL_COND(name.is_empty());
 	data.name = name;
 
 	if (data.parent) {
@@ -1990,7 +1990,7 @@ Node *Node::_duplicate(int p_flags, Map<const Node *, Node *> *r_duplimap) const
 		nip->set_instance_path(ip->get_instance_path());
 		node = nip;
 
-	} else if ((p_flags & DUPLICATE_USE_INSTANCING) && get_scene_file_path() != String()) {
+	} else if ((p_flags & DUPLICATE_USE_INSTANCING) && !get_scene_file_path().is_empty()) {
 		Ref<PackedScene> res = ResourceLoader::load(get_scene_file_path());
 		ERR_FAIL_COND_V(res.is_null(), nullptr);
 		PackedScene::GenEditState ges = PackedScene::GEN_EDIT_STATE_DISABLED;
@@ -2014,7 +2014,7 @@ Node *Node::_duplicate(int p_flags, Map<const Node *, Node *> *r_duplimap) const
 		ERR_FAIL_COND_V(!node, nullptr);
 	}
 
-	if (get_scene_file_path() != "") { //an instance
+	if (!get_scene_file_path().is_empty()) { //an instance
 		node->set_scene_file_path(get_scene_file_path());
 		node->data.editable_instance = data.editable_instance;
 	}
@@ -2046,7 +2046,7 @@ Node *Node::_duplicate(int p_flags, Map<const Node *, Node *> *r_duplimap) const
 
 				node_tree.push_back(descendant);
 
-				if (descendant->get_scene_file_path() != "" && instance_roots.has(descendant->get_owner())) {
+				if (!descendant->get_scene_file_path().is_empty() && instance_roots.has(descendant->get_owner())) {
 					instance_roots.push_back(descendant);
 				}
 			}
diff --git a/scene/main/scene_tree.cpp b/scene/main/scene_tree.cpp
index a122241cd0..2af8024fe4 100644
--- a/scene/main/scene_tree.cpp
+++ b/scene/main/scene_tree.cpp
@@ -510,7 +510,7 @@ bool SceneTree::process(double p_time) {
 			cpath = fallback->get_path();
 		}
 		if (cpath != env_path) {
-			if (env_path != String()) {
+			if (!env_path.is_empty()) {
 				fallback = ResourceLoader::load(env_path);
 				if (fallback.is_null()) {
 					//could not load fallback, set as empty
@@ -1290,7 +1290,7 @@ void SceneTree::get_argument_options(const StringName &p_function, int p_idx, Li
 			dir_access->list_dir_begin();
 			String filename = dir_access->get_next();
 
-			while (filename != "") {
+			while (!filename.is_empty()) {
 				if (filename == "." || filename == "..") {
 					filename = dir_access->get_next();
 					continue;
@@ -1400,7 +1400,7 @@ SceneTree::SceneTree() {
 		ResourceLoader::get_recognized_extensions_for_type("Environment", &exts);
 		String ext_hint;
 		for (const String &E : exts) {
-			if (ext_hint != String()) {
+			if (!ext_hint.is_empty()) {
 				ext_hint += ",";
 			}
 			ext_hint += "*." + E;
@@ -1410,7 +1410,7 @@ SceneTree::SceneTree() {
 		// Setup property.
 		ProjectSettings::get_singleton()->set_custom_property_info("rendering/environment/defaults/default_environment", PropertyInfo(Variant::STRING, "rendering/viewport/default_environment", PROPERTY_HINT_FILE, ext_hint));
 		env_path = env_path.strip_edges();
-		if (env_path != String()) {
+		if (!env_path.is_empty()) {
 			Ref<Environment> env = ResourceLoader::load(env_path);
 			if (env.is_valid()) {
 				root->get_world_3d()->set_fallback_environment(env);
diff --git a/scene/property_utils.cpp b/scene/property_utils.cpp
index 7df601492b..e3c65bbc6e 100644
--- a/scene/property_utils.cpp
+++ b/scene/property_utils.cpp
@@ -164,7 +164,7 @@ Vector<SceneState::PackState> PropertyUtils::get_node_states_stack(const Node *p
 					}
 				}
 				break;
-			} else if (n->get_scene_file_path() != String()) {
+			} else if (!n->get_scene_file_path().is_empty()) {
 				const Ref<SceneState> &state = n->get_scene_instance_state();
 				_collect_inheritance_chain(state, n->get_path_to(p_node), states_stack);
 			}
diff --git a/scene/register_scene_types.cpp b/scene/register_scene_types.cpp
index b56cd18930..9023b758b6 100644
--- a/scene/register_scene_types.cpp
+++ b/scene/register_scene_types.cpp
@@ -1046,7 +1046,7 @@ void initialize_theme() {
 	ProjectSettings::get_singleton()->set_custom_property_info("gui/theme/custom_font", PropertyInfo(Variant::STRING, "gui/theme/custom_font", PROPERTY_HINT_FILE, "*.tres,*.res,*.font", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_RESTART_IF_CHANGED));
 
 	Ref<Font> font;
-	if (font_path != String()) {
+	if (!font_path.is_empty()) {
 		font = ResourceLoader::load(font_path);
 		if (!font.is_valid()) {
 			ERR_PRINT("Error loading custom font '" + font_path + "'");
@@ -1058,7 +1058,7 @@ void initialize_theme() {
 		make_default_theme(default_theme_hidpi, font);
 	}
 
-	if (theme_path != String()) {
+	if (!theme_path.is_empty()) {
 		Ref<Theme> theme = ResourceLoader::load(theme_path);
 		if (theme.is_valid()) {
 			Theme::set_project_default(theme);
diff --git a/scene/resources/importer_mesh.cpp b/scene/resources/importer_mesh.cpp
index 7afa4c91f0..604b9e359f 100644
--- a/scene/resources/importer_mesh.cpp
+++ b/scene/resources/importer_mesh.cpp
@@ -653,7 +653,7 @@ Ref<ArrayMesh> ImporterMesh::get_mesh(const Ref<ArrayMesh> &p_base) {
 			if (surfaces[i].material.is_valid()) {
 				mesh->surface_set_material(mesh->get_surface_count() - 1, surfaces[i].material);
 			}
-			if (surfaces[i].name != String()) {
+			if (!surfaces[i].name.is_empty()) {
 				mesh->surface_set_name(mesh->get_surface_count() - 1, surfaces[i].name);
 			}
 		}
@@ -839,7 +839,7 @@ Dictionary ImporterMesh::_get_data() const {
 			d["material"] = surfaces[i].material;
 		}
 
-		if (surfaces[i].name != String()) {
+		if (!surfaces[i].name.is_empty()) {
 			d["name"] = surfaces[i].name;
 		}
 
diff --git a/scene/resources/mesh.cpp b/scene/resources/mesh.cpp
index e14d6be235..bd63d17424 100644
--- a/scene/resources/mesh.cpp
+++ b/scene/resources/mesh.cpp
@@ -1104,7 +1104,7 @@ Array ArrayMesh::_get_surfaces() const {
 			data["material"] = surfaces[i].material;
 		}
 
-		if (surfaces[i].name != String()) {
+		if (!surfaces[i].name.is_empty()) {
 			data["name"] = surfaces[i].name;
 		}
 
diff --git a/scene/resources/packed_scene.cpp b/scene/resources/packed_scene.cpp
index c39f59d535..e6b499d4f1 100644
--- a/scene/resources/packed_scene.cpp
+++ b/scene/resources/packed_scene.cpp
@@ -417,7 +417,7 @@ Error SceneState::_parse_node(Node *p_owner, Node *p_node, int p_parent_idx, Map
 
 	// save the child instantiated scenes that are chosen as editable, so they can be restored
 	// upon load back
-	if (p_node != p_owner && p_node->get_scene_file_path() != String() && p_owner->is_editable_instance(p_node)) {
+	if (p_node != p_owner && !p_node->get_scene_file_path().is_empty() && p_owner->is_editable_instance(p_node)) {
 		editable_instances.push_back(p_owner->get_path_to(p_node));
 		// Node is the root of an editable instance.
 		is_editable_instance = true;
@@ -451,7 +451,7 @@ Error SceneState::_parse_node(Node *p_owner, Node *p_node, int p_parent_idx, Map
 	bool instantiated_by_owner = false;
 	Vector<SceneState::PackState> states_stack = PropertyUtils::get_node_states_stack(p_node, p_owner, &instantiated_by_owner);
 
-	if (p_node->get_scene_file_path() != String() && p_node->get_owner() == p_owner && instantiated_by_owner) {
+	if (!p_node->get_scene_file_path().is_empty() && p_node->get_owner() == p_owner && instantiated_by_owner) {
 		if (p_node->get_scene_instance_load_placeholder()) {
 			//it's a placeholder, use the placeholder path
 			nd.instance = _vm_get_variant(p_node->get_scene_file_path(), variant_map);
@@ -656,7 +656,7 @@ Error SceneState::_parse_connections(Node *p_owner, Node *p_node, Map<StringName
 
 			ERR_CONTINUE(!common_parent);
 
-			if (common_parent != p_owner && common_parent->get_scene_file_path() == String()) {
+			if (common_parent != p_owner && common_parent->get_scene_file_path().is_empty()) {
 				common_parent = common_parent->get_owner();
 			}
 
@@ -716,7 +716,7 @@ Error SceneState::_parse_connections(Node *p_owner, Node *p_node, Map<StringName
 
 						nl = nullptr;
 					} else {
-						if (nl->get_scene_file_path() != String()) {
+						if (!nl->get_scene_file_path().is_empty()) {
 							//is an instance
 							Ref<SceneState> state = nl->get_scene_instance_state();
 							if (state.is_valid()) {
diff --git a/scene/resources/resource_format_text.cpp b/scene/resources/resource_format_text.cpp
index cead42b4e2..0e354ebff4 100644
--- a/scene/resources/resource_format_text.cpp
+++ b/scene/resources/resource_format_text.cpp
@@ -274,12 +274,12 @@ Ref<PackedScene> ResourceLoaderText::_parse_node_tag(VariantParser::ResourcePars
 					}
 				}
 
-				if (assign != String()) {
+				if (!assign.is_empty()) {
 					int nameidx = packed_scene->get_state()->add_name(assign);
 					int valueidx = packed_scene->get_state()->add_value(value);
 					packed_scene->get_state()->add_node_property(node_id, nameidx, valueidx);
 					//it's assignment
-				} else if (next_tag.name != String()) {
+				} else if (!next_tag.name.is_empty()) {
 					break;
 				}
 			}
@@ -575,12 +575,12 @@ Error ResourceLoaderText::load() {
 				return error;
 			}
 
-			if (assign != String()) {
+			if (!assign.is_empty()) {
 				if (do_assign) {
 					res->set(assign, value);
 				}
 				//it's assignment
-			} else if (next_tag.name != String()) {
+			} else if (!next_tag.name.is_empty()) {
 				error = OK;
 				break;
 			} else {
@@ -659,10 +659,10 @@ Error ResourceLoaderText::load() {
 				return error;
 			}
 
-			if (assign != String()) {
+			if (!assign.is_empty()) {
 				resource->set(assign, value);
 				//it's assignment
-			} else if (next_tag.name != String()) {
+			} else if (!next_tag.name.is_empty()) {
 				error = ERR_FILE_CORRUPT;
 				error_text = "Extra tag found when parsing main resource file";
 				_printerr();
@@ -1166,13 +1166,13 @@ Error ResourceLoaderText::save_as_binary(FileAccess *p_f, const String &p_path)
 				return error;
 			}
 
-			if (assign != String()) {
+			if (!assign.is_empty()) {
 				Map<StringName, int> empty_string_map; //unused
 				bs_save_unicode_string(wf2, assign, true);
 				ResourceFormatSaverBinaryInstance::write_variant(wf2, value, dummy_read.resource_index_map, dummy_read.external_resources, empty_string_map);
 				prop_count++;
 
-			} else if (next_tag.name != String()) {
+			} else if (!next_tag.name.is_empty()) {
 				error = OK;
 				break;
 			} else {
@@ -1350,7 +1350,7 @@ RES ResourceFormatLoaderText::load(const String &p_path, const String &p_origina
 	ERR_FAIL_COND_V_MSG(err != OK, RES(), "Cannot open file '" + p_path + "'.");
 
 	ResourceLoaderText loader;
-	String path = p_original_path != "" ? p_original_path : p_path;
+	String path = !p_original_path.is_empty() ? p_original_path : p_path;
 	loader.cache_mode = p_cache_mode;
 	loader.use_sub_threads = p_use_sub_threads;
 	loader.local_path = ProjectSettings::get_singleton()->localize_path(path);
@@ -1369,7 +1369,7 @@ RES ResourceFormatLoaderText::load(const String &p_path, const String &p_origina
 }
 
 void ResourceFormatLoaderText::get_recognized_extensions_for_type(const String &p_type, List<String> *p_extensions) const {
-	if (p_type == "") {
+	if (p_type.is_empty()) {
 		get_recognized_extensions(p_extensions);
 		return;
 	}
@@ -1655,7 +1655,7 @@ Error ResourceFormatSaverTextInstance::save(const String &p_path, const RES &p_r
 	Set<String> cached_ids_found;
 	for (KeyValue<RES, String> &E : external_resources) {
 		String cached_id = E.key->get_id_for_path(local_path);
-		if (cached_id == "" || cached_ids_found.has(cached_id)) {
+		if (cached_id.is_empty() || cached_ids_found.has(cached_id)) {
 			int sep_pos = E.value.find("_");
 			if (sep_pos != -1) {
 				E.value = E.value.substr(0, sep_pos + 1); // Keep the order found, for improved thread loading performance.
@@ -1729,7 +1729,7 @@ Error ResourceFormatSaverTextInstance::save(const String &p_path, const RES &p_r
 	for (List<RES>::Element *E = saved_resources.front(); E; E = E->next()) {
 		RES res = E->get();
 		if (E->next() && res->is_built_in()) {
-			if (res->get_scene_unique_id() != "") {
+			if (!res->get_scene_unique_id().is_empty()) {
 				if (used_unique_ids.has(res->get_scene_unique_id())) {
 					res->set_scene_unique_id(""); // Repeated.
 				} else {
@@ -1752,7 +1752,7 @@ Error ResourceFormatSaverTextInstance::save(const String &p_path, const RES &p_r
 			f->store_line("[resource]");
 		} else {
 			String line = "[sub_resource ";
-			if (res->get_scene_unique_id() == "") {
+			if (res->get_scene_unique_id().is_empty()) {
 				String new_id;
 				while (true) {
 					new_id = res->get_class() + "_" + Resource::generate_scene_unique_id();
@@ -1866,7 +1866,7 @@ Error ResourceFormatSaverTextInstance::save(const String &p_path, const RES &p_r
 
 			f->store_string(header);
 
-			if (instance_placeholder != String()) {
+			if (!instance_placeholder.is_empty()) {
 				String vars;
 				f->store_string(" instance_placeholder=");
 				VariantWriter::write_to_string(instance_placeholder, vars, _write_resources, this);
diff --git a/scene/resources/syntax_highlighter.cpp b/scene/resources/syntax_highlighter.cpp
index cfb5ac2ca6..800752d597 100644
--- a/scene/resources/syntax_highlighter.cpp
+++ b/scene/resources/syntax_highlighter.cpp
@@ -493,7 +493,7 @@ void CodeHighlighter::add_color_region(const String &p_start_key, const String &
 	color_region.color = p_color;
 	color_region.start_key = p_start_key;
 	color_region.end_key = p_end_key;
-	color_region.line_only = p_line_only || p_end_key == "";
+	color_region.line_only = p_line_only || p_end_key.is_empty();
 	color_regions.insert(at, color_region);
 	clear_highlighting_cache();
 }
@@ -529,7 +529,7 @@ void CodeHighlighter::set_color_regions(const Dictionary &p_color_regions) {
 		String start_key = key.get_slice(" ", 0);
 		String end_key = key.get_slice_count(" ") > 1 ? key.get_slice(" ", 1) : String();
 
-		add_color_region(start_key, end_key, p_color_regions[key], end_key == "");
+		add_color_region(start_key, end_key, p_color_regions[key], end_key.is_empty());
 	}
 	clear_highlighting_cache();
 }
diff --git a/scene/resources/text_file.cpp b/scene/resources/text_file.cpp
index 33bb0a83e9..1dc46711f8 100644
--- a/scene/resources/text_file.cpp
+++ b/scene/resources/text_file.cpp
@@ -33,7 +33,7 @@
 #include "core/io/file_access.h"
 
 bool TextFile::has_text() const {
-	return text != "";
+	return !text.is_empty();
 }
 
 String TextFile::get_text() const {
diff --git a/scene/resources/texture.cpp b/scene/resources/texture.cpp
index 311bd9524b..13c3f6ea1d 100644
--- a/scene/resources/texture.cpp
+++ b/scene/resources/texture.cpp
@@ -553,7 +553,7 @@ Error StreamTexture2D::load(const String &p_path) {
 	path_to_file = p_path;
 	format = image->get_format();
 
-	if (get_path() == String()) {
+	if (get_path().is_empty()) {
 		//temporarily set path if no path set for resource, helps find errors
 		RenderingServer::get_singleton()->texture_set_path(texture, p_path);
 	}
@@ -927,7 +927,7 @@ Error StreamTexture3D::load(const String &p_path) {
 
 	path_to_file = p_path;
 
-	if (get_path() == String()) {
+	if (get_path().is_empty()) {
 		//temporarily set path if no path set for resource, helps find errors
 		RenderingServer::get_singleton()->texture_set_path(texture, p_path);
 	}
@@ -2680,7 +2680,7 @@ Error StreamTextureLayered::load(const String &p_path) {
 
 	path_to_file = p_path;
 
-	if (get_path() == String()) {
+	if (get_path().is_empty()) {
 		//temporarily set path if no path set for resource, helps find errors
 		RenderingServer::get_singleton()->texture_set_path(texture, p_path);
 	}
diff --git a/scene/resources/visual_shader.cpp b/scene/resources/visual_shader.cpp
index 41e78e0bc8..10e75fb023 100644
--- a/scene/resources/visual_shader.cpp
+++ b/scene/resources/visual_shader.cpp
@@ -979,7 +979,7 @@ String VisualShader::generate_preview_shader(Type p_type, int p_node, int p_port
 String VisualShader::validate_port_name(const String &p_port_name, VisualShaderNode *p_node, int p_port_id, bool p_output) const {
 	String name = p_port_name;
 
-	if (name == String()) {
+	if (name.is_empty()) {
 		return String();
 	}
 
@@ -987,7 +987,7 @@ String VisualShader::validate_port_name(const String &p_port_name, VisualShaderN
 		name = name.substr(1, name.length() - 1);
 	}
 
-	if (name != String()) {
+	if (!name.is_empty()) {
 		String valid_name;
 
 		for (int i = 0; i < name.length(); i++) {
@@ -1031,7 +1031,7 @@ String VisualShader::validate_uniform_name(const String &p_name, const Ref<Visua
 	while (name.length() && !IS_INITIAL_CHAR(name[0])) {
 		name = name.substr(1, name.length() - 1);
 	}
-	if (name != String()) {
+	if (!name.is_empty()) {
 		String valid_name;
 
 		for (int i = 0; i < name.length(); i++) {
@@ -1045,7 +1045,7 @@ String VisualShader::validate_uniform_name(const String &p_name, const Ref<Visua
 		name = valid_name;
 	}
 
-	if (name == String()) {
+	if (name.is_empty()) {
 		name = p_uniform->get_caption();
 	}
 
@@ -1075,7 +1075,7 @@ String VisualShader::validate_uniform_name(const String &p_name, const Ref<Visua
 			while (name.length() && name[name.length() - 1] >= '0' && name[name.length() - 1] <= '9') {
 				name = name.substr(0, name.length() - 1);
 			}
-			ERR_FAIL_COND_V(name == String(), String());
+			ERR_FAIL_COND_V(name.is_empty(), String());
 			name += itos(attempt);
 		} else {
 			break;
@@ -1568,7 +1568,7 @@ Error VisualShader::_write_node(Type type, StringBuilder &global_code, StringBui
 	}
 
 	node_code += vsnode->generate_code(get_mode(), type, node, inputs, outputs, for_preview);
-	if (node_code != String()) {
+	if (!node_code.is_empty()) {
 		code += node_name;
 		code += node_code;
 		code += "\n";
@@ -1664,7 +1664,7 @@ void VisualShader::_update_shader() const {
 						String mode = ShaderTypes::get_singleton()->get_modes(RenderingServer::ShaderMode(shader_mode))[i];
 						if (mode.begins_with(render_mode_enums[idx].string)) {
 							if (count == which) {
-								if (render_mode != String()) {
+								if (!render_mode.is_empty()) {
 									render_mode += ", ";
 								}
 								render_mode += mode;
@@ -1682,7 +1682,7 @@ void VisualShader::_update_shader() const {
 		for (int i = 0; i < ShaderTypes::get_singleton()->get_modes(RenderingServer::ShaderMode(shader_mode)).size(); i++) {
 			String mode = ShaderTypes::get_singleton()->get_modes(RenderingServer::ShaderMode(shader_mode))[i];
 			if (flags.has(mode)) {
-				if (render_mode != String()) {
+				if (!render_mode.is_empty()) {
 					render_mode += ", ";
 				}
 				render_mode += mode;
@@ -1690,7 +1690,7 @@ void VisualShader::_update_shader() const {
 		}
 	}
 
-	if (render_mode != String()) {
+	if (!render_mode.is_empty()) {
 		global_code += "render_mode " + render_mode + ";\n\n";
 	}
 
@@ -2468,7 +2468,7 @@ String VisualShaderNodeInput::generate_code(Shader::Mode p_mode, VisualShader::T
 			idx++;
 		}
 
-		if (code == String()) {
+		if (code.is_empty()) {
 			switch (get_output_port_type(0)) {
 				case PORT_TYPE_SCALAR: {
 					code = "	" + p_output_vars[0] + " = 0.0;\n";
@@ -2502,7 +2502,7 @@ String VisualShaderNodeInput::generate_code(Shader::Mode p_mode, VisualShader::T
 			idx++;
 		}
 
-		if (code == String()) {
+		if (code.is_empty()) {
 			code = "	" + p_output_vars[0] + " = 0.0;\n"; //default (none found) is scalar
 		}
 
@@ -2605,7 +2605,7 @@ void VisualShaderNodeInput::_validate_property(PropertyInfo &property) const {
 
 		while (ports[idx].mode != Shader::MODE_MAX) {
 			if (ports[idx].mode == shader_mode && ports[idx].shader_type == shader_type) {
-				if (port_list != String()) {
+				if (!port_list.is_empty()) {
 					port_list += ",";
 				}
 				port_list += ports[idx].name;
@@ -2613,7 +2613,7 @@ void VisualShaderNodeInput::_validate_property(PropertyInfo &property) const {
 			idx++;
 		}
 
-		if (port_list == "") {
+		if (port_list.is_empty()) {
 			port_list = TTR("None");
 		}
 		property.hint_string = port_list;
@@ -3063,7 +3063,7 @@ String VisualShaderNodeOutput::generate_code(Shader::Mode p_mode, VisualShader::
 	String code;
 	while (ports[idx].mode != Shader::MODE_MAX) {
 		if (ports[idx].mode == shader_mode && ports[idx].shader_type == shader_type) {
-			if (p_input_vars[count] != String()) {
+			if (!p_input_vars[count].is_empty()) {
 				String s = ports[idx].string;
 				if (s.find(":") != -1) {
 					code += "	" + s.get_slicec(':', 0) + " = " + p_input_vars[count] + "." + s.get_slicec(':', 1) + ";\n";
diff --git a/scene/resources/visual_shader_nodes.cpp b/scene/resources/visual_shader_nodes.cpp
index e6870971d4..51e7ec8092 100644
--- a/scene/resources/visual_shader_nodes.cpp
+++ b/scene/resources/visual_shader_nodes.cpp
@@ -535,15 +535,15 @@ String VisualShaderNodeTexture::generate_code(Shader::Mode p_mode, VisualShader:
 	if (source == SOURCE_TEXTURE) {
 		String id = make_unique_id(p_type, p_id, "tex");
 		String code;
-		if (p_input_vars[0] == String()) { // Use UV by default.
+		if (p_input_vars[0].is_empty()) { // Use UV by default.
 
-			if (p_input_vars[1] == String()) {
+			if (p_input_vars[1].is_empty()) {
 				code += "	vec4 " + id + "_read = texture(" + id + ", " + default_uv + ");\n";
 			} else {
 				code += "	vec4 " + id + "_read = textureLod(" + id + ", " + default_uv + ", " + p_input_vars[1] + ");\n";
 			}
 
-		} else if (p_input_vars[1] == String()) {
+		} else if (p_input_vars[1].is_empty()) {
 			//no lod
 			code += "	vec4 " + id + "_read = texture(" + id + ", " + p_input_vars[0] + ".xy);\n";
 		} else {
@@ -560,18 +560,18 @@ String VisualShaderNodeTexture::generate_code(Shader::Mode p_mode, VisualShader:
 
 		String code;
 		code += "	{\n";
-		if (id == String()) {
+		if (id.is_empty()) {
 			code += "		vec4 " + id + "_tex_read = vec4(0.0);\n";
 		} else {
-			if (p_input_vars[0] == String()) { // Use UV by default.
+			if (p_input_vars[0].is_empty()) { // Use UV by default.
 
-				if (p_input_vars[1] == String()) {
+				if (p_input_vars[1].is_empty()) {
 					code += "		vec4 " + id + "_tex_read = texture(" + id + ", " + default_uv + ");\n";
 				} else {
 					code += "		vec4 " + id + "_tex_read = textureLod(" + id + ", " + default_uv + ", " + p_input_vars[1] + ");\n";
 				}
 
-			} else if (p_input_vars[1] == String()) {
+			} else if (p_input_vars[1].is_empty()) {
 				//no lod
 				code += "		vec4 " + id + "_tex_read = texture(" + id + ", " + p_input_vars[0] + ".xy);\n";
 			} else {
@@ -587,15 +587,15 @@ String VisualShaderNodeTexture::generate_code(Shader::Mode p_mode, VisualShader:
 
 	if (source == SOURCE_SCREEN && (p_mode == Shader::MODE_SPATIAL || p_mode == Shader::MODE_CANVAS_ITEM) && p_type == VisualShader::TYPE_FRAGMENT) {
 		String code = "	{\n";
-		if (p_input_vars[0] == String() || p_for_preview) { // Use UV by default.
+		if (p_input_vars[0].is_empty() || p_for_preview) { // Use UV by default.
 
-			if (p_input_vars[1] == String()) {
+			if (p_input_vars[1].is_empty()) {
 				code += "		vec4 _tex_read = textureLod(SCREEN_TEXTURE, " + default_uv + ", 0.0 );\n";
 			} else {
 				code += "		vec4 _tex_read = textureLod(SCREEN_TEXTURE, " + default_uv + ", " + p_input_vars[1] + ");\n";
 			}
 
-		} else if (p_input_vars[1] == String()) {
+		} else if (p_input_vars[1].is_empty()) {
 			//no lod
 			code += "		vec4 _tex_read = textureLod(SCREEN_TEXTURE, " + p_input_vars[0] + ".xy, 0.0);\n";
 		} else {
@@ -610,15 +610,15 @@ String VisualShaderNodeTexture::generate_code(Shader::Mode p_mode, VisualShader:
 
 	if (source == SOURCE_2D_TEXTURE && p_mode == Shader::MODE_CANVAS_ITEM && p_type == VisualShader::TYPE_FRAGMENT) {
 		String code = "	{\n";
-		if (p_input_vars[0] == String()) { // Use UV by default.
+		if (p_input_vars[0].is_empty()) { // Use UV by default.
 
-			if (p_input_vars[1] == String()) {
+			if (p_input_vars[1].is_empty()) {
 				code += "		vec4 _tex_read = texture(TEXTURE, " + default_uv + ");\n";
 			} else {
 				code += "		vec4 _tex_read = textureLod(TEXTURE, " + default_uv + ", " + p_input_vars[1] + ");\n";
 			}
 
-		} else if (p_input_vars[1] == String()) {
+		} else if (p_input_vars[1].is_empty()) {
 			//no lod
 			code += "		vec4 _tex_read = texture(TEXTURE, " + p_input_vars[0] + ".xy);\n";
 		} else {
@@ -633,15 +633,15 @@ String VisualShaderNodeTexture::generate_code(Shader::Mode p_mode, VisualShader:
 
 	if (source == SOURCE_2D_NORMAL && p_mode == Shader::MODE_CANVAS_ITEM && p_type == VisualShader::TYPE_FRAGMENT) {
 		String code = "	{\n";
-		if (p_input_vars[0] == String()) { // Use UV by default.
+		if (p_input_vars[0].is_empty()) { // Use UV by default.
 
-			if (p_input_vars[1] == String()) {
+			if (p_input_vars[1].is_empty()) {
 				code += "		vec4 _tex_read = texture(NORMAL_TEXTURE, " + default_uv + ");\n";
 			} else {
 				code += "		vec4 _tex_read = textureLod(NORMAL_TEXTURE, " + default_uv + ", " + p_input_vars[1] + ");\n";
 			}
 
-		} else if (p_input_vars[1] == String()) {
+		} else if (p_input_vars[1].is_empty()) {
 			//no lod
 			code += "		vec4 _tex_read = texture(NORMAL_TEXTURE, " + p_input_vars[0] + ".xy);\n";
 		} else {
@@ -666,15 +666,15 @@ String VisualShaderNodeTexture::generate_code(Shader::Mode p_mode, VisualShader:
 
 	if (source == SOURCE_DEPTH && p_mode == Shader::MODE_SPATIAL && p_type == VisualShader::TYPE_FRAGMENT) {
 		String code = "	{\n";
-		if (p_input_vars[0] == String()) { // Use UV by default.
+		if (p_input_vars[0].is_empty()) { // Use UV by default.
 
-			if (p_input_vars[1] == String()) {
+			if (p_input_vars[1].is_empty()) {
 				code += "		float _depth = texture(DEPTH_TEXTURE, " + default_uv + ").r;\n";
 			} else {
 				code += "		float _depth = textureLod(DEPTH_TEXTURE, " + default_uv + ", " + p_input_vars[1] + ").r;\n";
 			}
 
-		} else if (p_input_vars[1] == String()) {
+		} else if (p_input_vars[1].is_empty()) {
 			//no lod
 			code += "		float _depth = texture(DEPTH_TEXTURE, " + p_input_vars[0] + ".xy).r;\n";
 		} else {
@@ -883,7 +883,7 @@ String VisualShaderNodeCurveTexture::generate_global(Shader::Mode p_mode, Visual
 }
 
 String VisualShaderNodeCurveTexture::generate_code(Shader::Mode p_mode, VisualShader::Type p_type, int p_id, const String *p_input_vars, const String *p_output_vars, bool p_for_preview) const {
-	if (p_input_vars[0] == String()) {
+	if (p_input_vars[0].is_empty()) {
 		return "	" + p_output_vars[0] + " = 0.0;\n";
 	}
 	String id = make_unique_id(p_type, p_id, "curve");
@@ -968,7 +968,7 @@ String VisualShaderNodeCurveXYZTexture::generate_global(Shader::Mode p_mode, Vis
 }
 
 String VisualShaderNodeCurveXYZTexture::generate_code(Shader::Mode p_mode, VisualShader::Type p_type, int p_id, const String *p_input_vars, const String *p_output_vars, bool p_for_preview) const {
-	if (p_input_vars[0] == String()) {
+	if (p_input_vars[0].is_empty()) {
 		return "	" + p_output_vars[0] + " = vec3(0.0);\n";
 	}
 	String id = make_unique_id(p_type, p_id, "curve3d");
@@ -1076,14 +1076,14 @@ String VisualShaderNodeSample3D::generate_code(Shader::Mode p_mode, VisualShader
 		} else {
 			id = p_input_vars[2];
 		}
-		if (id != String()) {
-			if (p_input_vars[0] == String()) { // Use UV by default.
-				if (p_input_vars[1] == String()) {
+		if (!id.is_empty()) {
+			if (p_input_vars[0].is_empty()) { // Use UV by default.
+				if (p_input_vars[1].is_empty()) {
 					code += "		vec4 " + id + "_tex_read = texture(" + id + ", " + default_uv + ");\n";
 				} else {
 					code += "		vec4 " + id + "_tex_read = textureLod(" + id + ", " + default_uv + ", " + p_input_vars[1] + ");\n";
 				}
-			} else if (p_input_vars[1] == String()) {
+			} else if (p_input_vars[1].is_empty()) {
 				//no lod
 				code += "		vec4 " + id + "_tex_read = texture(" + id + ", " + p_input_vars[0] + ");\n";
 			} else {
@@ -1364,7 +1364,7 @@ String VisualShaderNodeCubemap::generate_code(Shader::Mode p_mode, VisualShader:
 
 	code += "	{\n";
 
-	if (id == String()) {
+	if (id.is_empty()) {
 		code += "		vec4 " + id + "_read = vec4(0.0);\n";
 		code += "		" + p_output_vars[0] + " = " + id + "_read.rgb;\n";
 		code += "		" + p_output_vars[1] + " = " + id + "_read.a;\n";
@@ -1372,15 +1372,15 @@ String VisualShaderNodeCubemap::generate_code(Shader::Mode p_mode, VisualShader:
 		return code;
 	}
 
-	if (p_input_vars[0] == String()) { // Use UV by default.
+	if (p_input_vars[0].is_empty()) { // Use UV by default.
 
-		if (p_input_vars[1] == String()) {
+		if (p_input_vars[1].is_empty()) {
 			code += "		vec4 " + id + "_read = texture(" + id + ", " + default_uv + ");\n";
 		} else {
 			code += "		vec4 " + id + "_read = textureLod(" + id + ", " + default_uv + ", " + p_input_vars[1] + " );\n";
 		}
 
-	} else if (p_input_vars[1] == String()) {
+	} else if (p_input_vars[1].is_empty()) {
 		//no lod
 		code += "		vec4 " + id + "_read = texture(" + id + ", " + p_input_vars[0] + ");\n";
 	} else {
@@ -4902,13 +4902,13 @@ String VisualShaderNodeTextureUniform::generate_code(Shader::Mode p_mode, Visual
 
 	String id = get_uniform_name();
 	String code = "	{\n";
-	if (p_input_vars[0] == String()) { // Use UV by default.
-		if (p_input_vars[1] == String()) {
+	if (p_input_vars[0].is_empty()) { // Use UV by default.
+		if (p_input_vars[1].is_empty()) {
 			code += "		vec4 n_tex_read = texture(" + id + ", " + default_uv + ");\n";
 		} else {
 			code += "		vec4 n_tex_read = textureLod(" + id + ", " + default_uv + ", " + p_input_vars[1] + ");\n";
 		}
-	} else if (p_input_vars[1] == String()) {
+	} else if (p_input_vars[1].is_empty()) {
 		//no lod
 		code += "		vec4 n_tex_read = texture(" + id + ", " + p_input_vars[0] + ".xy);\n";
 	} else {
@@ -5070,11 +5070,11 @@ String VisualShaderNodeTextureUniformTriplanar::generate_code(Shader::Mode p_mod
 	String id = get_uniform_name();
 	String code = "	{\n";
 
-	if (p_input_vars[0] == String() && p_input_vars[1] == String()) {
+	if (p_input_vars[0].is_empty() && p_input_vars[1].is_empty()) {
 		code += "		vec4 n_tex_read = triplanar_texture(" + id + ", triplanar_power_normal, triplanar_pos);\n";
-	} else if (p_input_vars[0] != String() && p_input_vars[1] == String()) {
+	} else if (!p_input_vars[0].is_empty() && p_input_vars[1].is_empty()) {
 		code += "		vec4 n_tex_read = triplanar_texture(" + id + ", " + p_input_vars[0] + ", triplanar_pos);\n";
-	} else if (p_input_vars[0] == String() && p_input_vars[1] != String()) {
+	} else if (p_input_vars[0].is_empty() && !p_input_vars[1].is_empty()) {
 		code += "		vec4 n_tex_read = triplanar_texture(" + id + ", triplanar_power_normal, " + p_input_vars[1] + ");\n";
 	} else {
 		code += "		vec4 n_tex_read = triplanar_texture(" + id + ", " + p_input_vars[0] + ", " + p_input_vars[1] + ");\n";
@@ -5600,12 +5600,12 @@ bool VisualShaderNodeFresnel::is_generate_input_var(int p_port) const {
 String VisualShaderNodeFresnel::generate_code(Shader::Mode p_mode, VisualShader::Type p_type, int p_id, const String *p_input_vars, const String *p_output_vars, bool p_for_preview) const {
 	String normal;
 	String view;
-	if (p_input_vars[0] == String()) {
+	if (p_input_vars[0].is_empty()) {
 		normal = "NORMAL";
 	} else {
 		normal = p_input_vars[0];
 	}
-	if (p_input_vars[1] == String()) {
+	if (p_input_vars[1].is_empty()) {
 		view = "VIEW";
 	} else {
 		view = p_input_vars[1];
diff --git a/scene/resources/visual_shader_sdf_nodes.cpp b/scene/resources/visual_shader_sdf_nodes.cpp
index 14c655b129..0fe7c33396 100644
--- a/scene/resources/visual_shader_sdf_nodes.cpp
+++ b/scene/resources/visual_shader_sdf_nodes.cpp
@@ -61,7 +61,7 @@ String VisualShaderNodeSDFToScreenUV::get_output_port_name(int p_port) const {
 }
 
 String VisualShaderNodeSDFToScreenUV::generate_code(Shader::Mode p_mode, VisualShader::Type p_type, int p_id, const String *p_input_vars, const String *p_output_vars, bool p_for_preview) const {
-	return "		" + p_output_vars[0] + " = vec3(sdf_to_screen_uv(" + (p_input_vars[0] == String() ? "vec2(0.0)" : p_input_vars[0] + ".xy") + "), 0.0f);\n";
+	return "		" + p_output_vars[0] + " = vec3(sdf_to_screen_uv(" + (p_input_vars[0].is_empty() ? "vec2(0.0)" : p_input_vars[0] + ".xy") + "), 0.0f);\n";
 }
 
 VisualShaderNodeSDFToScreenUV::VisualShaderNodeSDFToScreenUV() {
@@ -105,7 +105,7 @@ String VisualShaderNodeScreenUVToSDF::get_input_port_default_hint(int p_port) co
 }
 
 String VisualShaderNodeScreenUVToSDF::generate_code(Shader::Mode p_mode, VisualShader::Type p_type, int p_id, const String *p_input_vars, const String *p_output_vars, bool p_for_preview) const {
-	return "		" + p_output_vars[0] + " = vec3(screen_uv_to_sdf(" + (p_input_vars[0] == String() ? "SCREEN_UV" : p_input_vars[0] + ".xy") + "), 0.0f);\n";
+	return "		" + p_output_vars[0] + " = vec3(screen_uv_to_sdf(" + (p_input_vars[0].is_empty() ? "SCREEN_UV" : p_input_vars[0] + ".xy") + "), 0.0f);\n";
 }
 
 VisualShaderNodeScreenUVToSDF::VisualShaderNodeScreenUVToSDF() {
@@ -142,7 +142,7 @@ String VisualShaderNodeTextureSDF::get_output_port_name(int p_port) const {
 }
 
 String VisualShaderNodeTextureSDF::generate_code(Shader::Mode p_mode, VisualShader::Type p_type, int p_id, const String *p_input_vars, const String *p_output_vars, bool p_for_preview) const {
-	return "		" + p_output_vars[0] + " = texture_sdf(" + (p_input_vars[0] == String() ? "vec2(0.0)" : p_input_vars[0] + ".xy") + ");\n";
+	return "		" + p_output_vars[0] + " = texture_sdf(" + (p_input_vars[0].is_empty() ? "vec2(0.0)" : p_input_vars[0] + ".xy") + ");\n";
 }
 
 VisualShaderNodeTextureSDF::VisualShaderNodeTextureSDF() {
@@ -179,7 +179,7 @@ String VisualShaderNodeTextureSDFNormal::get_output_port_name(int p_port) const
 }
 
 String VisualShaderNodeTextureSDFNormal::generate_code(Shader::Mode p_mode, VisualShader::Type p_type, int p_id, const String *p_input_vars, const String *p_output_vars, bool p_for_preview) const {
-	return "		" + p_output_vars[0] + " = vec3(texture_sdf_normal(" + (p_input_vars[0] == String() ? "vec2(0.0)" : p_input_vars[0] + ".xy") + "), 0.0f);\n";
+	return "		" + p_output_vars[0] + " = vec3(texture_sdf_normal(" + (p_input_vars[0].is_empty() ? "vec2(0.0)" : p_input_vars[0] + ".xy") + "), 0.0f);\n";
 }
 
 VisualShaderNodeTextureSDFNormal::VisualShaderNodeTextureSDFNormal() {
@@ -242,13 +242,13 @@ String VisualShaderNodeSDFRaymarch::generate_code(Shader::Mode p_mode, VisualSha
 
 	code += "		{\n";
 
-	if (p_input_vars[0] == String()) {
+	if (p_input_vars[0].is_empty()) {
 		code += "				vec2 __from_pos = vec2(0.0f);\n";
 	} else {
 		code += "				vec2 __from_pos = " + p_input_vars[0] + ".xy;\n";
 	}
 
-	if (p_input_vars[1] == String()) {
+	if (p_input_vars[1].is_empty()) {
 		code += "				vec2 __to_pos = vec2(0.0f);\n";
 	} else {
 		code += "				vec2 __to_pos = " + p_input_vars[1] + ".xy;\n";
diff --git a/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp b/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp
index 768bd1de9d..71753f9694 100644
--- a/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp
+++ b/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp
@@ -44,7 +44,7 @@ void SceneShaderForwardClustered::ShaderData::set_code(const String &p_code) {
 	uniforms.clear();
 	uses_screen_texture = false;
 
-	if (code == String()) {
+	if (code.is_empty()) {
 		return; //just invalid, but no error
 	}
 
diff --git a/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp b/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp
index e6d9a60f94..8807ebf134 100644
--- a/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp
+++ b/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp
@@ -47,7 +47,7 @@ void SceneShaderForwardMobile::ShaderData::set_code(const String &p_code) {
 	uniforms.clear();
 	uses_screen_texture = false;
 
-	if (code == String()) {
+	if (code.is_empty()) {
 		return; //just invalid, but no error
 	}
 
diff --git a/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp b/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp
index d013099cce..2ff7f27d33 100644
--- a/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp
+++ b/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp
@@ -1953,7 +1953,7 @@ void RendererCanvasRenderRD::ShaderData::set_code(const String &p_code) {
 	uses_sdf = false;
 	uses_time = false;
 
-	if (code == String()) {
+	if (code.is_empty()) {
 		return; //just invalid, but no error
 	}
 
diff --git a/servers/rendering/renderer_rd/renderer_compositor_rd.cpp b/servers/rendering/renderer_rd/renderer_compositor_rd.cpp
index 522a8e8112..d310becd1e 100644
--- a/servers/rendering/renderer_rd/renderer_compositor_rd.cpp
+++ b/servers/rendering/renderer_rd/renderer_compositor_rd.cpp
@@ -240,7 +240,7 @@ RendererCompositorRD *RendererCompositorRD::singleton = nullptr;
 RendererCompositorRD::RendererCompositorRD() {
 	{
 		String shader_cache_dir = Engine::get_singleton()->get_shader_cache_path();
-		if (shader_cache_dir == String()) {
+		if (shader_cache_dir.is_empty()) {
 			shader_cache_dir = "user://";
 		}
 		DirAccessRef da = DirAccess::open(shader_cache_dir);
@@ -261,7 +261,7 @@ RendererCompositorRD::RendererCompositorRD() {
 					shader_cache_dir = String(); //disable only if not editor
 				}
 
-				if (shader_cache_dir != String()) {
+				if (!shader_cache_dir.is_empty()) {
 					bool compress = GLOBAL_GET("rendering/shader_compiler/shader_cache/compress");
 					bool use_zstd = GLOBAL_GET("rendering/shader_compiler/shader_cache/use_zstd_compression");
 					bool strip_debug = GLOBAL_GET("rendering/shader_compiler/shader_cache/strip_debug");
diff --git a/servers/rendering/renderer_rd/renderer_scene_render_rd.cpp b/servers/rendering/renderer_rd/renderer_scene_render_rd.cpp
index ae8d91a73b..b3d3b82b72 100644
--- a/servers/rendering/renderer_rd/renderer_scene_render_rd.cpp
+++ b/servers/rendering/renderer_rd/renderer_scene_render_rd.cpp
@@ -3581,7 +3581,7 @@ void RendererSceneRenderRD::FogShaderData::set_code(const String &p_code) {
 	ubo_size = 0;
 	uniforms.clear();
 
-	if (code == String()) {
+	if (code.is_empty()) {
 		return; //just invalid, but no error
 	}
 
diff --git a/servers/rendering/renderer_rd/renderer_scene_sky_rd.cpp b/servers/rendering/renderer_rd/renderer_scene_sky_rd.cpp
index a9c39fb937..f595edb225 100644
--- a/servers/rendering/renderer_rd/renderer_scene_sky_rd.cpp
+++ b/servers/rendering/renderer_rd/renderer_scene_sky_rd.cpp
@@ -46,7 +46,7 @@ void RendererSceneSkyRD::SkyShaderData::set_code(const String &p_code) {
 	ubo_size = 0;
 	uniforms.clear();
 
-	if (code == String()) {
+	if (code.is_empty()) {
 		return; //just invalid, but no error
 	}
 
diff --git a/servers/rendering/renderer_rd/renderer_storage_rd.cpp b/servers/rendering/renderer_rd/renderer_storage_rd.cpp
index f8d0aad4fa..79728169ae 100644
--- a/servers/rendering/renderer_rd/renderer_storage_rd.cpp
+++ b/servers/rendering/renderer_rd/renderer_storage_rd.cpp
@@ -2861,7 +2861,7 @@ void RendererStorageRD::MaterialData::update_textures(const Map<StringName, Vari
 				}
 			}
 #ifdef TOOLS_ENABLED
-			if (roughness_detect_texture && normal_detect_texture && normal_detect_texture->path != String()) {
+			if (roughness_detect_texture && normal_detect_texture && !normal_detect_texture->path.is_empty()) {
 				roughness_detect_texture->detect_roughness_callback(roughness_detect_texture->detect_roughness_callback_ud, normal_detect_texture->path, roughness_channel);
 			}
 #endif
@@ -2901,7 +2901,7 @@ void RendererStorageRD::MaterialData::update_textures(const Map<StringName, Vari
 					rd_texture = singleton->texture_rd_get_default(DEFAULT_RD_TEXTURE_WHITE);
 				}
 #ifdef TOOLS_ENABLED
-				if (roughness_detect_texture && normal_detect_texture && normal_detect_texture->path != String()) {
+				if (roughness_detect_texture && normal_detect_texture && !normal_detect_texture->path.is_empty()) {
 					roughness_detect_texture->detect_roughness_callback(roughness_detect_texture->detect_roughness_callback_ud, normal_detect_texture->path, roughness_channel);
 				}
 #endif
@@ -5820,7 +5820,7 @@ void RendererStorageRD::ParticlesShaderData::set_code(const String &p_code) {
 	uniforms.clear();
 	uses_collision = false;
 
-	if (code == String()) {
+	if (code.is_empty()) {
 		return; //just invalid, but no error
 	}
 
diff --git a/servers/rendering/renderer_rd/shader_rd.cpp b/servers/rendering/renderer_rd/shader_rd.cpp
index 2568090918..438e78ba8c 100644
--- a/servers/rendering/renderer_rd/shader_rd.cpp
+++ b/servers/rendering/renderer_rd/shader_rd.cpp
@@ -79,7 +79,7 @@ void ShaderRD::_add_stage(const char *p_code, StageType p_stage_type) {
 		}
 
 		if (push_chunk) {
-			if (text != String()) {
+			if (!text.is_empty()) {
 				StageTemplate::Chunk text_chunk;
 				text_chunk.type = StageTemplate::Chunk::TYPE_TEXT;
 				text_chunk.text = text.utf8();
@@ -90,7 +90,7 @@ void ShaderRD::_add_stage(const char *p_code, StageType p_stage_type) {
 		}
 	}
 
-	if (text != String()) {
+	if (!text.is_empty()) {
 		StageTemplate::Chunk text_chunk;
 		text_chunk.type = StageTemplate::Chunk::TYPE_TEXT;
 		text_chunk.text = text.utf8();
@@ -638,7 +638,7 @@ void ShaderRD::initialize(const Vector<String> &p_variant_defines, const String
 		variants_enabled.push_back(true);
 	}
 
-	if (shader_cache_dir != String()) {
+	if (!shader_cache_dir.is_empty()) {
 		StringBuilder hash_build;
 
 		hash_build.append("[base_hash]");
diff --git a/servers/rendering/rendering_device.cpp b/servers/rendering/rendering_device.cpp
index 5602bb197b..38f57b4624 100644
--- a/servers/rendering/rendering_device.cpp
+++ b/servers/rendering/rendering_device.cpp
@@ -205,7 +205,7 @@ Vector<uint8_t> RenderingDevice::_shader_compile_binary_from_spirv(const Ref<RDS
 		ShaderStageSPIRVData sd;
 		sd.shader_stage = stage;
 		String error = p_spirv->get_stage_compile_error(stage);
-		ERR_FAIL_COND_V_MSG(error != String(), Vector<uint8_t>(), "Can't create a shader from an errored bytecode. Check errors in source bytecode.");
+		ERR_FAIL_COND_V_MSG(!error.is_empty(), Vector<uint8_t>(), "Can't create a shader from an errored bytecode. Check errors in source bytecode.");
 		sd.spir_v = p_spirv->get_stage_bytecode(stage);
 		if (sd.spir_v.is_empty()) {
 			continue;
@@ -225,7 +225,7 @@ RID RenderingDevice::_shader_create_from_spirv(const Ref<RDShaderSPIRV> &p_spirv
 		ShaderStageSPIRVData sd;
 		sd.shader_stage = stage;
 		String error = p_spirv->get_stage_compile_error(stage);
-		ERR_FAIL_COND_V_MSG(error != String(), RID(), "Can't create a shader from an errored bytecode. Check errors in source bytecode.");
+		ERR_FAIL_COND_V_MSG(!error.is_empty(), RID(), "Can't create a shader from an errored bytecode. Check errors in source bytecode.");
 		sd.spir_v = p_spirv->get_stage_bytecode(stage);
 		if (sd.spir_v.is_empty()) {
 			continue;
diff --git a/servers/rendering/rendering_device_binds.cpp b/servers/rendering/rendering_device_binds.cpp
index a21f28989b..3d09d83601 100644
--- a/servers/rendering/rendering_device_binds.cpp
+++ b/servers/rendering/rendering_device_binds.cpp
@@ -80,7 +80,7 @@ Error RDShaderFile::parse_versions_from_text(const String &p_text, const String
 						}
 					}
 
-					if (base_error != String()) {
+					if (!base_error.is_empty()) {
 						break;
 					}
 				}
@@ -89,7 +89,7 @@ Error RDShaderFile::parse_versions_from_text(const String &p_text, const String
 			}
 		}
 
-		if (stage == RD::SHADER_STAGE_MAX && line.strip_edges() != "") {
+		if (stage == RD::SHADER_STAGE_MAX && !line.strip_edges().is_empty()) {
 			line = line.strip_edges();
 			if (line.begins_with("//") || line.begins_with("/*")) {
 				continue; //assuming comment (single line)
@@ -98,7 +98,7 @@ Error RDShaderFile::parse_versions_from_text(const String &p_text, const String
 
 		if (reading_versions) {
 			String l = line.strip_edges();
-			if (l != "") {
+			if (!l.is_empty()) {
 				if (l.find("=") == -1) {
 					base_error = "Missing `=` in '" + l + "'. Version syntax is `version = \"<defines with C escaping>\";`.";
 					break;
@@ -124,7 +124,7 @@ Error RDShaderFile::parse_versions_from_text(const String &p_text, const String
 				version_texts[version] = define + "\n" + p_defines;
 			}
 		} else {
-			if (stage == RD::SHADER_STAGE_MAX && line.strip_edges() != "") {
+			if (stage == RD::SHADER_STAGE_MAX && !line.strip_edges().is_empty()) {
 				base_error = "Text was found that does not belong to a valid section: " + line;
 				break;
 			}
@@ -140,7 +140,7 @@ Error RDShaderFile::parse_versions_from_text(const String &p_text, const String
 						}
 						include = include.substr(1, include.length() - 2).strip_edges();
 						String include_text = p_include_func(include, p_include_func_userdata);
-						if (include_text != String()) {
+						if (!include_text.is_empty()) {
 							stage_code[stage] += "\n" + include_text + "\n";
 						} else {
 							base_error = "#include failed for file '" + include + "'";
@@ -158,7 +158,7 @@ Error RDShaderFile::parse_versions_from_text(const String &p_text, const String
 	Ref<RDShaderFile> shader_file;
 	shader_file.instantiate();
 
-	if (base_error == "") {
+	if (base_error.is_empty()) {
 		if (stage_found[RD::SHADER_STAGE_COMPUTE] && stages_found > 1) {
 			ERR_FAIL_V_MSG(ERR_PARSE_ERROR, "When writing compute shaders, [compute] mustbe the only stage present.");
 		}
@@ -177,14 +177,14 @@ Error RDShaderFile::parse_versions_from_text(const String &p_text, const String
 
 			for (int i = 0; i < RD::SHADER_STAGE_MAX; i++) {
 				String code = stage_code[i];
-				if (code == String()) {
+				if (code.is_empty()) {
 					continue;
 				}
 				code = code.replace("VERSION_DEFINES", E.value);
 				String error;
 				Vector<uint8_t> spirv = RenderingDevice::get_singleton()->shader_compile_spirv_from_source(RD::ShaderStage(i), code, RD::SHADER_LANGUAGE_GLSL, &error, false);
 				bytecode->set_stage_bytecode(RD::ShaderStage(i), spirv);
-				if (error != "") {
+				if (!error.is_empty()) {
 					error += String() + "\n\nStage '" + stage_str[i] + "' source code: \n\n";
 					Vector<String> sclines = code.split("\n");
 					for (int j = 0; j < sclines.size(); j++) {
diff --git a/servers/rendering/rendering_device_binds.h b/servers/rendering/rendering_device_binds.h
index 2cf7821668..651c9b0090 100644
--- a/servers/rendering/rendering_device_binds.h
+++ b/servers/rendering/rendering_device_binds.h
@@ -368,13 +368,13 @@ public:
 	}
 
 	void print_errors(const String &p_file) {
-		if (base_error != "") {
+		if (!base_error.is_empty()) {
 			ERR_PRINT("Error parsing shader '" + p_file + "':\n\n" + base_error);
 		} else {
 			for (KeyValue<StringName, Ref<RDShaderSPIRV>> &E : versions) {
 				for (int i = 0; i < RD::SHADER_STAGE_MAX; i++) {
 					String error = E.value->get_stage_compile_error(RD::ShaderStage(i));
-					if (error != String()) {
+					if (!error.is_empty()) {
 						static const char *stage_str[RD::SHADER_STAGE_MAX] = {
 							"vertex",
 							"fragment",
diff --git a/servers/rendering/shader_language.cpp b/servers/rendering/shader_language.cpp
index 6acadc6882..d8673b63b7 100644
--- a/servers/rendering/shader_language.cpp
+++ b/servers/rendering/shader_language.cpp
@@ -2999,7 +2999,7 @@ bool ShaderLanguage::_validate_function_call(BlockNode *p_block, const FunctionI
 		}
 
 		FunctionNode *pfunc = shader->functions[i].function;
-		if (arg_list == "") {
+		if (arg_list.is_empty()) {
 			for (int j = 0; j < pfunc->arguments.size(); j++) {
 				if (j > 0) {
 					arg_list += ", ";
@@ -7236,7 +7236,7 @@ Error ShaderLanguage::_parse_block(BlockNode *p_block, const FunctionInfo &p_fun
 			if (tk.type == TK_SEMICOLON) {
 				//all is good
 				if (b->parent_function->return_type != TYPE_VOID) {
-					_set_error("Expected return with an expression of type '" + (return_struct_name != "" ? return_struct_name : get_datatype_name(b->parent_function->return_type)) + array_size_string + "'");
+					_set_error("Expected return with an expression of type '" + (!return_struct_name.is_empty() ? return_struct_name : get_datatype_name(b->parent_function->return_type)) + array_size_string + "'");
 					return ERR_PARSE_ERROR;
 				}
 			} else {
@@ -7248,7 +7248,7 @@ Error ShaderLanguage::_parse_block(BlockNode *p_block, const FunctionInfo &p_fun
 				}
 
 				if (b->parent_function->return_type != expr->get_datatype() || b->parent_function->return_array_size != expr->get_array_size() || return_struct_name != expr->get_datatype_name()) {
-					_set_error("Expected return with an expression of type '" + (return_struct_name != "" ? return_struct_name : get_datatype_name(b->parent_function->return_type)) + array_size_string + "'");
+					_set_error("Expected return with an expression of type '" + (!return_struct_name.is_empty() ? return_struct_name : get_datatype_name(b->parent_function->return_type)) + array_size_string + "'");
 					return ERR_PARSE_ERROR;
 				}
 
@@ -7370,7 +7370,7 @@ String ShaderLanguage::_get_shader_type_list(const Set<String> &p_shader_types)
 	// Return a list of shader types as an human-readable string
 	String valid_types;
 	for (const Set<String>::Element *E = p_shader_types.front(); E; E = E->next()) {
-		if (valid_types != String()) {
+		if (!valid_types.is_empty()) {
 			valid_types += ", ";
 		}
 
@@ -8933,7 +8933,7 @@ String ShaderLanguage::get_shader_type(const String &p_code) {
 			break;
 
 		} else if (p_code[i] <= 32) {
-			if (cur_identifier != String()) {
+			if (!cur_identifier.is_empty()) {
 				if (!reading_type) {
 					if (cur_identifier != "shader_type") {
 						return String();
diff --git a/tests/core/io/test_file_access.h b/tests/core/io/test_file_access.h
index 4ffc57afe4..f566899c9b 100644
--- a/tests/core/io/test_file_access.h
+++ b/tests/core/io/test_file_access.h
@@ -53,7 +53,7 @@ TEST_CASE("[FileAccess] CSV read") {
 	REQUIRE(row2.size() == 3);
 	CHECK(row2[0] == "GOOD_EVENING");
 	CHECK(row2[1] == "Good Evening");
-	CHECK(row2[2] == ""); // Use case: not yet translated!
+	CHECK(row2[2].is_empty()); // Use case: not yet translated!
 	// https://github.com/godotengine/godot/issues/44269
 	CHECK_MESSAGE(row2[2] != "\"", "Should not parse empty string as a single double quote.");
 
diff --git a/tests/core/math/test_math.cpp b/tests/core/math/test_math.cpp
index 6ec9bc2473..97e6055130 100644
--- a/tests/core/math/test_math.cpp
+++ b/tests/core/math/test_math.cpp
@@ -312,7 +312,7 @@ public:
 					}
 				}
 
-				if (name != String()) {
+				if (!name.is_empty()) {
 					namespace_stack[at_level] = name;
 				}
 
diff --git a/tests/core/string/test_string.h b/tests/core/string/test_string.h
index 00a9a8779a..eef1cac894 100644
--- a/tests/core/string/test_string.h
+++ b/tests/core/string/test_string.h
@@ -157,10 +157,10 @@ TEST_CASE("[String] Invalid UTF8") {
 	String s;
 	bool err = s.parse_utf8((const char *)u8str);
 	CHECK(err);
-	CHECK(s == String());
+	CHECK(s.is_empty());
 
 	CharString cs = (const char *)u8str;
-	CHECK(String::utf8(cs) == String());
+	CHECK(String::utf8(cs).is_empty());
 	ERR_PRINT_ON
 }
 
@@ -170,10 +170,10 @@ TEST_CASE("[String] Invalid UTF16") {
 	String s;
 	bool err = s.parse_utf16(u16str);
 	CHECK(err);
-	CHECK(s == String());
+	CHECK(s.is_empty());
 
 	Char16String cs = u16str;
-	CHECK(String::utf16(cs) == String());
+	CHECK(String::utf16(cs).is_empty());
 	ERR_PRINT_ON
 }
 
@@ -1439,6 +1439,24 @@ TEST_CASE("[String] Variant ptr indexed set") {
 
 	CHECK_EQ(s, String("azcd"));
 }
+
+TEST_CASE("[Stress][String] Empty via ' == String()'") {
+	for (int i = 0; i < 100000; ++i) {
+		String str = "Hello World!";
+		if (str.is_empty()) {
+			continue;
+		}
+	}
+}
+
+TEST_CASE("[Stress][String] Empty via `is_empty()`") {
+	for (int i = 0; i < 100000; ++i) {
+		String str = "Hello World!";
+		if (str.is_empty()) {
+			continue;
+		}
+	}
+}
 } // namespace TestString
 
 #endif // TEST_STRING_H
diff --git a/tests/scene/test_code_edit.h b/tests/scene/test_code_edit.h
index 0467d4417b..4b5a049a07 100644
--- a/tests/scene/test_code_edit.h
+++ b/tests/scene/test_code_edit.h
@@ -3235,7 +3235,7 @@ TEST_CASE("[SceneTree][CodeEdit] Backspace delete") {
 	code_edit->insert_text_at_caret("line 1\nline 2\nline 3");
 	code_edit->select_all();
 	code_edit->backspace();
-	CHECK(code_edit->get_text() == "");
+	CHECK(code_edit->get_text().is_empty());
 
 	/* Backspace at the beginning without selection has no effect. */
 	code_edit->set_text("");