Text Diff Checker
Compare two texts line by line.
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How to use Text Diff Checker
Paste the original text on the left and the new version on the right.
Optionally ignore case or whitespace so only real changes show up.
Read the highlighted diff and the count of added and removed lines.
Frequently Asked Questions
How are differences detected?
With a longest-common-subsequence diff, the same approach Git uses, so moved and edited lines are matched instead of shifting everything below them.
Can I compare code or JSON?
Yes. For JSON, format both sides first so that only real differences remain rather than differences in indentation.
Is my text uploaded for comparison?
No. The diff is computed in your browser, so contracts, source code and drafts stay entirely on your device.
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