Convert Case

Tired of retyping text just to change the case? Select text anywhere in your browser, right-click, and convert it instantly - no copy-pasting to external tools.

Convert Case is a fast, lightweight 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, CONSTANT_CASE, param-case (slugify), dot.case, path/case

Utility conversions:
Alternating Case, Inverse Case, No Case (plain lowercase words)

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 recognised 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:
- 2.4.0 - Conversions in input and textarea fields now dispatch input/change events so host pages register the update — 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 capitalised
- 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 optimisation
- 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