TD
Text Diff Checker
Paste two texts — instantly see which lines were added and which removed, with color highlighting. It all happens in your browser.
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Original Text
Changed Text
Result
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How to use — Text Diff Checker
- Paste the original text in the first box.
- Paste the changed/new text in the second box.
- Click Compare texts — removed lines show in red, new lines in green.
FAQ
How is the diff calculated?
A line-by-line comparison using the LCS (Longest Common Subsequence) algorithm — the same approach version control tools like Git use.
Is my text uploaded anywhere?
No — the comparison happens entirely in the browser. It's safe to compare contracts, code, or confidential documents.
What do the colors mean?
Red-background lines were in the original but not the new version (removed). Green lines were added in the new version. Uncolored lines are the same in both.
Is there a word-level diff?
Currently it's a line-level diff, which is enough for most cases. If a line has a small change, that line appears in both removed and added.
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