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Diff Checker
Paste an original and a changed version to see exactly what was added and removed.
How to read the result
- Green (+) is text that was added in the changed version.
- Red (−) is text that was removed.
- Everything else is unchanged.
Good uses
- Check what changed between two drafts of a contract, essay or policy.
- Compare configuration files or code snippets without installing anything.
- Spot edits someone made to a message before you approve it.
Frequently asked questions
How does the diff checker find changes?
It uses the Myers algorithm, the same approach as Git, to find the smallest set of additions and deletions that turns the first text into the second.
Line or word comparison: which should I use?
Line by line suits code, lists and data. Word by word suits prose, contracts and emails, where a single changed word matters.
Is my text private?
Yes. The comparison runs in your browser and nothing is sent anywhere, so you can compare contracts or code safely.