Case Converter
Convert text to upper, lower, title, sentence, camel, Pascal, snake, kebab or constant case.
How to use this tool
- Select your file, drag it onto the box above.
- Processing starts automatically — there is nothing to configure.
- Check the result panel, which shows the original size, the final size and the page count.
- Click Download to save it.
Title case uses the standard convention of leaving short articles, conjunctions and prepositions lowercase unless they begin the string. All nine forms are produced at once, so you can copy whichever you need.
The specification
| Cases | UPPER, lower, Title, Sentence, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE |
|---|---|
| Title case rule | Short words such as a, an, and, of, the stay lowercase unless first |
| Programming cases | Non-alphanumeric characters become separators |
How it works
This tool runs entirely in your browser. There is no server involved, which means nothing you type or upload is transmitted, stored, or logged — and there are no usage limits, because there is nothing for us to ration.
You can confirm it yourself: open your browser's developer tools, select the Network tab, and use the tool. No request is made.
Who uses this
Writers fixing headline capitalisation, and developers converting names between the conventions different languages use.
Frequently asked questions
What is the difference between title case and sentence case?
Title case capitalises most words — "How to Compress an Image". Sentence case capitalises only the first word and proper nouns — "How to compress an image".
Which case should I use in code?
Convention follows the language: camelCase for JavaScript and Java variables, snake_case for Python and Ruby, PascalCase for classes and types, kebab-case for URLs and CSS, CONSTANT_CASE for constants.
Does it handle accented characters?
Yes for upper, lower, title and sentence case. The programming cases strip non-alphanumeric characters, accents included, since identifiers rarely permit them.
Are my files uploaded to a server?
No. Everything runs inside your browser on your own device. Your file is never transmitted and never stored by us. You can confirm this by opening your browser’s Network tab while you use the tool — you will see no upload request.
Is there a limit on how many files I can process?
No. There is no daily cap, no account, and no watermark. Because the work happens on your device rather than our servers, there is nothing for us to ration.
Is this tool really free?
Yes — no account, no trial, no watermark, and no cap on usage. It runs on your own device rather than our servers, so there is no cost for us to pass on.
Does it work on mobile?
Yes. The interface adapts to phone and tablet screens, and everything runs in the browser, so there is no app to install.
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Your files stay on your device. This tool runs entirely in your browser. No file is uploaded, transmitted, or stored. You can verify this by opening your browser's Network tab while using the tool.
Disclaimer. Specifications published by exam boards, governments and platforms change without notice. We verify and date every specification on this site, but you should always confirm against the official source before submitting an application. See our full disclaimer.