Diff & Patch Generator
Compare two texts line-by-line, visualize differences, and download the output as a patch file.
How does this tool work?
Compare two text versions line-by-line and create standard patch files.
The tool performs a line-by-line comparison between the original and modified text entirely in your browser. It highlights additions (green) and deletions (red) and exports the result as a standard Unified Diff patch file (.patch).
Where are my data processed?
100% Client-Side: Your data never leaves your browser.
All calculations, conversions, encodings, and file processing of this tool are executed exclusively locally via JavaScript on your client device. No inputs, passwords, cryptographic keys, texts, or uploaded files are ever sent to our servers or third parties. Once the page is loaded, the tool remains completely functional even offline.