Case Converter

The Case Converter transforms text between eight styles — UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case and kebab-case — in a single click. Paste text once and convert it to any style without retyping, making it useful for anyone who needs to reformat text quickly: writers fixing text that arrived in all caps, editors applying headline capitalization, and developers renaming identifiers as code moves between languages and conventions.

Common scenarios include cleaning up a press release or email that was typed with caps-lock stuck on, converting a spreadsheet column of names into consistent Title Case before a mail merge, and — for developers — turning a Python variable like 'user_first_name' (snake_case) into the camelCase 'userFirstName' a JavaScript function expects, or into the kebab-case 'user-first-name' a CSS class or URL parameter needs. Because the case converter handles multi-line and long text instantly, it works just as well converting a single label as it does an entire file of extracted strings pasted in at once.

Under the hood, camelCase and PascalCase conversion first splits the input on spaces, hyphens, underscores and existing case boundaries to recover the individual words, then rejoins them with the target capitalization — which is why it correctly handles mixed input like 'user_first-name' or 'UserFirstName' rather than only clean, space-separated text. Sentence case capitalizes the first letter after sentence-ending punctuation rather than just the first letter of the whole string, so multi-sentence paragraphs convert correctly rather than only the opening word. All conversion happens instantly in your browser.

One caveat: Title Case here capitalizes every word, which is the simplest and most common convention, but strict editorial style guides like AP or Chicago lowercase short conjunctions and prepositions ('and', 'of', 'the') within a title — for that level of precision, review the result manually after converting.