Diff Checker
betaA line-by-line comparison with side-by-side and unified views, additions and deletions counted, and options to ignore whitespace or case. Uses a real longest-common-subsequence diff, so inserting one line does not mark everything after it as changed.
Runs in your browser · nothing uploaded·Free, no signup
FAQ
Is Diff Checker free?
Yes. Diff Checker is completely free and runs entirely in your browser. No account required.
Does Diff Checker send my data anywhere?
No. All processing happens locally in your browser. Nothing is uploaded to a server.