Case Converter
Switch text between UPPERCASE, lowercase, Title Case, Sentence case and programmer cases like camelCase and snake_case — instantly, in your browser.
Your text never leaves your browser. Conversion happens on your device — nothing is uploaded to any server.
How it works
Type or paste your text
Pick a case — UPPER, Title, camelCase…
Copy the converted result
About this tool
A case converter changes the capitalisation of your text without retyping it. It is handy for fixing a headline that came in ALL CAPS, turning a title into a clean URL, standardising a spreadsheet column, or generating a variable name in the exact style your codebase uses. This tool supports ten styles — UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE and aLtErNaTiNg — and updates the result as you type. Everything runs locally in your browser, so it is fast, free, has no daily limit, and your text is never uploaded. Pair it with the word counter or the slug generator when preparing content for the web.
Frequently asked questions
Paste your text and choose UPPERCASE. Every letter is converted to a capital instantly, and you can copy the result with one click.
Title Case capitalises the first letter of every word (Great for headings), while Sentence case only capitalises the first letter of each sentence (Like this).
Yes. The converter detects word boundaries — including existing camelCase — and can output camelCase, PascalCase, snake_case, kebab-case or CONSTANT_CASE for variables, filenames and slugs.
No. The conversion runs entirely in your browser using JavaScript. Nothing you type is uploaded, so it is safe for private or sensitive text.
There is no fixed limit. You can convert anything from a single word to long documents — the only practical ceiling is your device's memory.