What algorithm is used for the diff?

The tool uses a Longest Common Subsequence (LCS) algorithm to produce an accurate line-by-line diff.

Can I compare code files?

Yes. Paste any text including source code, config files, or prose and the diff will highlight every changed line.

Yes. All processing happens in your browser. No data is sent to any server.

Data Tools

Compare two texts and view line-by-line differences

Guest workspace

Original (Left)· Paste the original text here.

Session Title

Modified (Right)· Paste the modified text here.

Diff Output· Color-coded line-by-line diff. Green for additions, red for deletions.

Click Compare to see the diff output.