Free Text Diff Checker
Paste two versions of a text or file and see exactly what changed · line-by-line, with additions and removals highlighted.
Frequently asked
Is it safe to diff confidential documents here?
Yes · the comparison runs entirely in your browser using JavaScript. Neither text is transmitted, logged, or stored anywhere.
How does the diff algorithm work?
It computes a longest-common-subsequence over lines · the same family of algorithm behind git diff. Unchanged lines align, and everything else is marked added or removed.
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