Text Diff
Free online text diff checker. Compare two blocks of text and see additions, deletions, and unchanged lines highlighted. No sign-up required.
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— Help others discover itFrequently Asked Questions
How does the text diff work?
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It compares text line by line using a longest common subsequence algorithm. Added lines are highlighted green, removed lines red, and unchanged lines have no highlight.
Can I compare large texts?
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Yes. The diff runs entirely in your browser so there are no server limits. Very large texts (10,000+ lines) may take a moment to process.
Is my text sent to a server?
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No. All processing happens locally in your browser. Nothing is uploaded or stored.