Diff Checker
Compare two texts
FreeNo sign-upNothing uploaded
Field guide
About the Diff Checker
Spot every change between two versions of a document, contract, essay or code file. Paste the original and the changed text to see added lines in green and removed lines in red, with word-level highlights inside changed lines.
- Paste the original text on the left.
- Paste the changed text on the right.
- Press Compare to see the differences highlighted.
Questions
Frequently asked
Is my text uploaded?
No. The comparison runs in your browser, so confidential documents stay private.
Can I ignore whitespace or case?
Yes. Use the options to ignore changes in spacing or letter case.
What algorithm is used?
A longest-common-subsequence diff on lines, followed by a word-level diff of changed lines, similar to the diff tools developers use.
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