Diff Checker
Paste two texts and see additions and deletions highlighted line by line.
Compare Texts
About this tool
The Diff Checker uses a line-based LCS (Longest Common Subsequence) algorithm to compare two texts.
Added lines are highlighted in green, removed lines in red, and unchanged lines are shown normally.
All processing happens entirely in your browser — no data is ever sent to our servers.
How to use
- 1Paste your original text in the left panel.
- 2Paste the revised text in the right panel.
- 3Click Compare Texts to see the diff.
- 4Green lines are additions, red lines are removals.
Frequently Asked Questions
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