Text Diff Checker

Spot added, removed and changed lines without sending either version anywhere.

What this tool does

Compare original and modified text in a clear side-by-side or unified diff. Processing happens locally in your browser; entered and generated text is not uploaded or stored by this tool.

Frequently asked questions

Is this a Git patch generator?

No. The output is a readable text comparison, not a repository-aware patch.

How are large comparisons handled?

Comparison is slightly delayed while typing and bounded to keep the interface responsive.