Case Converter

Five modes for converting letter case.

Runs locallyNo signupMobile readyCopyableFree

AaCase Converter

All processing happens locally

Input text

Output

Case Converter is a bulk letter case converter, processing happens locally in your browser with no upload.

Style guides disagree: titles often use title case while sentences use sentence case. Bulk conversion avoids missed letters.

Paste or type your content into the input field at the top, or press the sample button to load demo data.
Adjust the options below the input, such as output format, separators, letter case or precision.
Press the main button to run the conversion. Results appear instantly in the output panel without a page reload.
When the result looks right, use the copy button in the corner, or download it as a local file.

Clean up stray spaces and line breaks before pasting for more accurate results.

Does it affect non-Latin text?+

No. Characters without case are preserved unchanged.

What is inverted case?+

It swaps upper and lower case, useful for novelty text or spotting mixed-case errors.

Is Case Converter free to use?+

Yes. The tool is completely free with no usage limits, and you never need an account or a sign-in.

Is the text I enter uploaded anywhere?+

No. All processing runs locally in your browser, so the input never reaches a server and is never logged or stored.

Does Case Converter work on a phone or tablet?+

Yes. The layout is mobile-first, so inputs and buttons stay comfortable on phones and tablets in both orientations.

Can I copy the result into my own document?+

Yes. A copy button in the output panel puts the result on your clipboard, and you can also download it as a text file.