Text Diff Checker
Compare two text blocks side by side and instantly see additions, deletions, and unchanged lines highlighted. Supports split and unified views.
Drop file here or click to browse
Original
Drop file here or click to browse
Modified
How to Use
- 1 Paste your original text into the left panel
- 2 Paste the modified text into the right panel
- 3 Differences are highlighted automatically in real time
- 4 Toggle between Split view and Unified view using the buttons
- 5 Use Swap to exchange the original and modified texts
FAQ
Is my text sent to a server?
No. All comparison is done entirely in your browser — nothing is uploaded.
What diff algorithm is used?
A Longest Common Subsequence (LCS) algorithm computes line-level differences, similar to the unix diff command.
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