Compare Text Instantly
Paste two versions of any text and see every difference highlighted. 100% client-side, free forever.
🔒 100% Private
All processing happens in your browser. No text is ever sent to a server.
⚡ Instant Results
Myers diff algorithm delivers accurate line-by-line comparison in milliseconds.
📊 Visual Stats
See at a glance how many lines were added, removed, or left unchanged.
📱 Works Everywhere
Fully responsive design that works on desktop, tablet, and mobile browsers.
Frequently Asked Questions
Yes, Diff Checker is completely free. No signup, account, or payment required. Use it as often as you need.
Absolutely. All text comparison runs locally in your browser using JavaScript. Your text is never uploaded or transmitted anywhere.
We use the Myers diff algorithm for accurate, minimal diffs. You can view results in unified or side-by-side mode, and copy the diff to your clipboard with one click.
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