Convert Case

Convert text in your browser between UPPER CASE, lower case and more

Change the case of text without retyping it. Select text anywhere in your browser, right-click, and convert it in place, with no copy-pasting to external tools. Convert Case is a text case changer with 16 conversions, keyboard shortcuts, automatic clipboard copy, and full UI translations in 15 languages. Change case directly in your browser: select, right-click, done. Works on regular web pages, Google Docs, Reddit, and more. Writing conversions UPPER CASE, lower case, Title Case, Sentence case, Capitalized Case, No Accents Developer conversions camelCase, PascalCase, snake_case, SCREAMING_SNAKE_CASE, kebab-case, dot.case Utility conversions Alternating Case, Inverse Case, No Case (plain lowercase words), Slugify (URL slugs) Features - Change case in place via right-click context menu - Keyboard shortcuts for quick access (Alt+U, Alt+L, Alt+C, Alt+A) - or set your own - Copy After Conversion - automatically copies converted text to the clipboard - Automatic proper noun casing in Title Case, Sentence case, and Capitalized Case - thousands of names, places, brands, and acronyms are recognized and cased correctly (Paris, IBM, Abu Dhabi, iOS) - toggle off or add your own custom terms in Settings - Counts submenu with live character, word, sentence, and line counts for the current selection - Configurable Title Case options (ignore words like "the", "and", "of") Works with Google Docs (Shift+right-click or keyboard shortcut), Reddit, Disqus, WYSIWYG editors, TinyMCE, and iframe-based content. Privacy All conversions are performed locally on your device. Convert Case does not collect, transmit, or store any user data. Languages English, British English, Deutsch, Ελληνικά, Español, Filipino, Français, हिन्दी, Magyar, Italiano, Polski, Português, Slovenščina, Türkçe, Українська. Automatically follows your browser's language; can be overridden in Settings. Changelog - 2.5.0 - New kebab-case conversion, which keeps words in any alphabet, as the site's does. Conversions now match convertcase.net: Title Case, Sentence case and Capitalized Case handle abbreviations, initials, quotes and hyphenated words as the site does, and words that are also names (rest, polish, zoom) keep their own casing unless typed as the name; the developer conversions work in any alphabet and convert each line on its own. param-case is now Slugify and CONSTANT_CASE is SCREAMING_SNAKE_CASE, as on the site, and path/case is removed. Converting text that spans links or bold keeps them, and in a text box, an editor or Google Docs, Ctrl+Z undoes the conversion (text on the page that cannot be edited cannot be undone). The popup and settings follow the site's design, with dark mode. Copy After Conversion is also a switch in Settings, and the two stay in step. Fixed the menu changing for a background tab, counts resetting to 0, Google Docs overwriting the clipboard when converting from the right-click menu in Chrome, and large custom word lists not saving - 2.4.3 - Fixed the space after a word being deleted when converting - double-clicking a word on Windows selects the space that follows it, and conversions such as No Case, PascalCase and CONSTANT_CASE were swallowing it, so "Lorem ipsum dolor" became "Lorem ipsumdolor" - 2.4.2 - Title Case and Capitalized Case now capitalize the letter after a forward slash: loving each other/hurting each other becomes Loving Each Other/Hurting Each Other; accented letters after quotes, brackets, and slashes are also handled correctly - 2.4.1 - Refined the built-in proper noun list to reduce false positives, including removals like WHO and JAR so common words are less likely to be forced into acronym casing - 2.4.0 - Conversions in input and textarea fields now dispatch input/change events so host pages register the update. This fixes silent reverts in tools like Yoast meta titles and React-controlled inputs - 2.3.1 - Refined the built-in proper noun list to avoid false positives for common words (e.g. "us", "one", "man", "ice", "raw", "arm", "pet") that were being incorrectly capitalized - 2.3.0 - New "Proper Nouns" setting replaces Ignored Words and Correct Words; toggle auto-correction of built-in proper nouns and abbreviations on or off, and add your own custom terms whose casing overrides the built-in list. Existing Correct Words are migrated automatically; Ignored Words are retired (add the word in your preferred casing to the new list instead) - 2.2.0 - Translated into 15 languages (English, British English, German, Greek, Spanish, Filipino, French, Hindi, Hungarian, Italian, Polish, Portuguese, Slovenian, Turkish, Ukrainian); follows your browser's language automatically, with an override in Settings - 2.1.0 - Automatic proper noun casing in Title Case, Sentence case, and Capitalized Case (names, places, brands, acronyms); accented characters now transliterate properly when slugifying (café → cafe, straße → strasse); new Counts submenu showing live character, word, sentence, and line counts for the current selection - 2.0.0 - New developer conversions (camelCase, PascalCase, CONSTANT_CASE, param-case, snake_case, dot.case, path/case), new utility conversions (Capitalized Case, Alternating Case, Inverse Case, No Accents, No Case), ignored words and correct words settings, autosave - 1.6.0 - Support for Google Docs - 1.5.2 - Fixed conversions not working on existing tabs after first install - 1.5.1 - Added keyboard shortcuts link to context menu - 1.5.0 - Additional keyboard shortcuts and refreshed info/settings UI - 1.4.1 - Reliability updates - 1.4.0 - Bug fixes and optimization - 1.3.0 - New icon - 1.2.1 - Disqus and Slate Editor fixes - 1.2.0 - Support for Disqus and more iframe-based content - 1.1.0 - Support for Reddit and WYSIWYG editors - 1.0.10 - Fixed automatic copy after conversion not working - 1.0.9 - Settings page for title case options and keyboard shortcuts - 1.0.8 - Reliability updates - 1.0.7 - Title Case conversion and Slugify option - 1.0.0 - Initial release