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?
Only in your browser. Your data is not sent to any server.
The tool calculates and converts with JavaScript right on your device. Input and files are not sent to us or anyone else. You can check this yourself: load the page, disconnect from the internet, and the tool keeps working in the open tab.
No Server UploadNo sign-upRuns Offline in Tab