This case converter rewrites text into the capitalisation style you need. Choose a mode, type or paste your text, and the converted version appears immediately. There is no upload and no account.
Your data is processed locally in your browser and is not uploaded to our server.
camelCase, PascalCase, snake_case and kebab-case split the text into words
Words are separated at spaces, punctuation and camel-case boundaries. camelCase lowercases the first word and capitalises the rest; snake_case and kebab-case join lowercase words with underscores or hyphens.
Title Case capitalises each word; Sentence case capitalises the first letter of each sentence
Title case preserves the original spacing and capitalises the first letter of every word. Sentence case lowercases the text first, then capitalises after a full stop, question mark, exclamation mark or line break.
“user account id” needs to become a JavaScript identifier.
The same three words produce different identifiers depending on the naming convention your project uses.
A lowercase heading needs title case.
Title case capitalises every word. For sentence case, only the first word and proper nouns would normally be capitalised.
Word-based styles lowercase the input before rebuilding it, so “HTMLParser” becomes htmlParser or html_parser. That is predictable but may not preserve acronyms you want to keep.
Chinese, Japanese and Korean do not distinguish upper and lower case. The converter returns the text unchanged for those styles instead of inventing changes.
Sentence case keeps line breaks and capitalises the first letter of each new line. camelCase and snake_case join words across lines into one identifier.
Title case capitalises every word, while sentence case capitalises only the first letter of each sentence. Headlines often use title case; body text uses sentence case.
It only changes capitalisation and, for camelCase, snake_case and kebab-case, replaces spaces and punctuation with separators. The words themselves are not translated or rewritten.
Yes, within the limits of your browser. Very large documents may be slower because the conversion happens locally on every keystroke.
Yes. Case changes use the browser’s locale-aware upper- and lowercase rules, so accented Latin, Greek and Cyrillic text is handled correctly. Scripts without case are left as they are.
No. The conversion runs entirely in your browser, and the text is not stored or uploaded.