Diff Viewer
Compare two text inputs line by line. See what changed, what was added, and what was removed.
0 added
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0 removed
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0 unchanged
Paste text in both panels and click Compare.
About this tool
Compares text line by line using a longest common subsequence algorithm. Highlights additions in green, deletions in red, and unchanged lines in gray. Switch between unified and side-by-side views. Everything runs in your browser — nothing is sent to a server. Limited to 5,000 lines per panel.