Diff Checker
Compare two texts line by line — additions in green, removals in red.
Frequently asked questions
How does the comparison work?
The tool computes a longest-common-subsequence diff over lines, the same core approach used by git. Lines present only in the new text show as additions, lines missing from it show as removals.
Is my text uploaded anywhere?
No. Both texts are compared with JavaScript in your browser and are never transmitted or stored.
Can I compare code or contracts?
Yes — anything line-based works well: code, contracts, essays, configuration files. For word-level changes inside a line, the changed line simply shows as one removal plus one addition.