Case Converter
Convert text to every common case at once — UPPER, camelCase, snake_case and more.
- Secure upload
- Deleted after processing
- No watermark
Click any card to copy that version to your clipboard.
About the case converter
This free online case converter does something most single-mode converters don't: it shows every common case format at once, live, as you type — UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and two novelty formats for fun — instead of making you pick a mode, convert, copy, then start over to try a different one. Click any card to copy that version straight to your clipboard.
The programming-case formats are built for developers and are genuinely more useful than a naive word-by-word capitalizer: paste in a sentence, a hyphenated title, or an existing camelCase or snake_case variable, and the tool correctly splits it back into individual words — including detecting word boundaries inside existing camelCase or PascalCase text — before rebuilding it as camelCase, PascalCase, snake_case, kebab-case or CONSTANT_CASE. That round-trip matters when renaming a variable between naming conventions, converting a CSV header row into code-safe field names, or turning a product name into a URL slug.
Title Case is implemented properly rather than naively — it follows the standard convention of keeping short function words (a, an, the, of, in, and similar) lowercase in the middle of a title while still capitalizing the first and last word and anything after a colon, the way a real headline or book title is styled, rather than just capitalizing every single word regardless of what it is. Sentence case correctly capitalizes the first letter of every sentence rather than only the very first character of the whole text, so a paragraph converts the way a person actually would by hand.
Everything recalculates instantly as you type, entirely in your browser — nothing you write is ever uploaded to a server, so it's safe to use on unpublished drafts, internal variable names or anything else you're not ready to share.
Key features
- All 11 case formats shown live at once — no picking a mode first
- Proper title-case rules, not naive per-word capitalization
- Correct word-boundary detection for camelCase/PascalCase/snake_case round-trips
- Click-to-copy on every card
Common use cases
Renaming code variables
Convert an existing name between camelCase, PascalCase, snake_case and kebab-case conventions instantly.
Headlines & titles
Get a properly capitalized Title Case headline that keeps minor words lowercase, the way real headlines are styled.
URL slugs & filenames
Turn a title or product name into a clean kebab-case slug or snake_case filename.
Cleaning up pasted text
Fix text that was typed in ALL CAPS, or normalize inconsistent capitalization with one click.
How to use it
- 1Type or paste any text — a heading, a sentence, a variable name.
- 2Every case format updates live in the grid below.
- 3Click any card to copy that version to your clipboard.
- 4Paste it wherever you need it — code, a title, a slug, a heading.
Supported formats & limits
Works on plain text of any length; the programming-case formats assume Latin-alphabet word boundaries.
Privacy & security
Every conversion happens locally in your browser as you type — nothing is ever sent to a server.
FAQ
- Is my text uploaded anywhere?
- No. Every conversion happens locally in your browser as you type — nothing is ever sent to a server.
- How is Title Case different from just capitalizing every word?
- It follows standard title-case convention: short function words like "a," "the," "of" and "and" stay lowercase in the middle of a title, while the first and last word are always capitalized — matching how real headlines and book titles are styled.
- Can it convert an existing camelCase or snake_case name to another format?
- Yes — the tool detects word boundaries in existing camelCase, PascalCase, snake_case and kebab-case text and correctly rebuilds it in any other format.
- Does Sentence case handle multiple sentences?
- Yes — it capitalizes the first letter after every sentence-ending punctuation mark, not just the very start of the text.