Online Diff Checker
Compare text directly in your browser — no download, no extension, no account required.
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Why use an online diff checker instead of a desktop app?
Desktop diff tools need to be installed and kept updated, and some require you to create an account. An online diff checker skips all of that — open the page, paste your text, and get results in seconds. It also works the same way on Windows, macOS, Linux, or a Chromebook, since it only needs a browser.
Because everything runs client-side in JavaScript, there's no upload step and no waiting on a server. That also means it's usable offline once the page has loaded.
Frequently asked questions
- Do I need to create an account to use this?
- No account, no email, and no installation. Just open the page and start comparing.
- Is there a limit on how much text I can compare?
- There's no hard limit, though very large files (tens of thousands of lines) may render slowly since comparison happens in your browser.
- Can I use this on mobile?
- Yes, the tool is responsive and works on phone and tablet browsers, though a larger screen makes reviewing long diffs easier.