In-browser tool
Text diff checker
Compare two texts line by line and see what changed — privately.
How it works
01
Type or paste your input
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Get the result instantly
03
Copy the result
Frequently asked questions
How does the comparison work?
A longest-common-subsequence diff over lines, like git: unchanged lines stay, removed lines are marked −, added lines +.
Is my file uploaded to a server?
No. This tool runs entirely in your browser. You can open your browser's network tab and verify no request carries your file.