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Text compare (diff checker)
Compare two texts side by side and highlight added and removed lines instantly. Private diff checker that runs in your browser.
🔒 Your text never leaves your browserHow to use the text compare (diff checker)
- Paste the original text on the left.
- Paste the new version on the right.
- Review highlighted additions and removals below.
About this tool
The diff checker compares the texts line by line using a longest-common-subsequence algorithm, the same approach as git diff. Lines only in the changed text are marked + added, lines only in the original are − removed.
Because comparison happens locally, it is safe for contracts, code and confidential drafts.
FAQ
Is my text uploaded?
No. Unlike many diff sites, nothing is sent to a server.
How large can the texts be?
Up to roughly 2,000 lines each, which covers most documents and code files.
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