Case Converter
Turn any text into ten different letter cases at once — UPPER CASE, lower case, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE and Invert cASE. Nothing leaves your browser.
All conversion happens locally in your browser. Title Case keeps the rest of each word unchanged and lowercases small words (a, of, the…) except at the start and end. camelCase, snake_case and friends drop punctuation and emoji — identifiers cannot contain them.
How to use
- Paste or type your text into the box.
- All ten conversions are produced instantly — find the one you need.
- Click “Copy” on that card and paste it wherever you want.
Details
Letter case is a presentation choice, and different contexts demand different conventions. Prose headings want Title Case; sentence-style UI copy wants Sentence case; code wants camelCase, snake_case or CONSTANT_CASE; URLs and CSS class names want kebab-case. This tool produces all of them from a single paste so you never have to retype.
Conversions are locale-independent: they use the standard Unicode case mappings rather than language-specific ones. That avoids surprises such as the Turkish dotless i turning into a dotted capital İ when you were only trying to uppercase an English word. Chinese, Japanese and Korean characters have no case, so they pass through unchanged, and emoji are preserved in every style except the identifier formats, which cannot contain them.
FAQ
Does converting change my original text?
No. Your input box is never modified. Every style is generated as a separate result card, so you can compare them side by side and copy only the one you need.
Why does camelCase drop spaces and punctuation?
camelCase, PascalCase, snake_case and kebab-case are identifier formats used in programming. An identifier cannot contain spaces, commas or emoji, so non-alphanumeric characters are removed and word boundaries become capital letters or separators. The style list shows this in a note whenever it applies.
How does Title Case decide what to capitalise?
The first and last word are always capitalised. Short function words in the middle — a, an, the, of, in, and, for and similar — stay lowercase, matching most style guides. The rest of each word is left exactly as you typed it, so acronyms like API or HTTP survive untouched.
Is my text sent anywhere?
No. All ten conversions run locally in your browser. Your text never leaves your device and is not stored.