Case Converter
Use Case Converter to uppercase, lowercase, title case — free, immediate, and with nothing to install. All counting, matching and rewriting happens in JavaScript on the page itself, so even long confidential drafts stay in your browser. It is used most by developers tidying data pasted out of a spreadsheet or log. Line endings from Windows, macOS and Linux are all understood. It stays free with unlimited use, and there is no watermark on anything it produces.
Key features
- Line endings from Windows, macOS and Linux are all understood.
- Works on documents of tens of thousands of words without lag.
- Works on desktop, tablet and phone — no separate app to install.
- Loads in under a second and gives its result in one action.
How to use Case Converter
- Paste your text: Paste or type into the box above. It accepts anything from a sentence to a full manuscript.
- Choose what you need: Set the options that match your task — the result updates as you change them.
- Copy the result: Copy the output with one click and paste it wherever you are working.
Frequently asked questions
- How much text can I paste in? — Tens of thousands of words is comfortable. The only real limit is how much your browser will hold.
- Does it handle languages other than English? — Yes — full Unicode support, so Cyrillic, Arabic, Chinese, Japanese, accented Latin and emoji are all handled properly.
- Is there any signup? — None. Case Converter has no account, no email capture and no usage cap.
- Is my text stored when I use Case Converter? — No. Case Converter processes the text in the page itself. Nothing is transmitted or saved, which matters for unpublished or confidential writing.