Case Converter.
Convert text between UPPER, lower, Title, camelCase, snake_case, and more.
Input
Output
Everything happens in your browser
Local processing
Conversions happen in your browser. Nothing is uploaded.
Instant results
Native browser APIs mean no server queue, no waiting room.
No account needed
Open, drop, convert. No sign-up, no email, no friction.
Frequently asked questions
What's the difference between Title Case and Sentence case?
Title Case capitalizes every word. Sentence case only capitalizes the first word.
Does Title Case follow style guides like AP or Chicago?
It uses a simple every-word approach. Strict AP/Chicago style isn't supported yet.
Do camelCase and snake_case work on multi-word sentences?
Yes. 'Hello World From Earth' becomes 'helloWorldFromEarth' or 'hello_world_from_earth'.
Are my files really not uploaded?
Correct. Every conversion in this tool runs in your browser using JavaScript and the local file APIs. There is no server-side processing, no file upload, no temporary storage, and no log of what you converted. You can verify this by opening your browser's network tab while converting — the only traffic is loading the page itself.
Do I need an account or to install anything?
No. Open the page, drop your file, download the result. No signup, no email, no extension, no app.
Is there a file-size limit?
Not from us. The practical limit is your device's memory — browser tabs typically handle files in the hundreds of megabytes range without issues. Very large files may take longer to process on phones than on laptops.