About RomPatcher.app
RomPatcher.app is a simple, fast, and privacy-first ROM patcher that runs in your browser. It applies common patch formats locally on your device — so your files don’t need to be uploaded anywhere.
Our mission
ROM hacking, fan translations, and community patches are awesome — but patching tools are often confusing, outdated, or require downloads. We built RomPatcher.app to make patching easier: open the site, choose your base ROM and patch, and get a patched file.
Patching happens locally in your browser. We do not ask you to upload ROM files, and we do not host or distribute ROMs. Use only ROMs you legally own and patches you have permission to use.
What we support
The tool is built to handle popular patch formats used by different communities. Exact support depends on the RomPatcher.js build you are using, but commonly includes IPS, BPS, UPS, PPF, and XDELTA/VCDIFF.
How it works
- Select a clean base ROM (matching region/revision recommended).
- Select the patch file (IPS/BPS/UPS/PPF/XDELTA, etc.).
- Apply patch and download the new patched ROM.
Most failures happen when the base ROM doesn’t match what the patch expects (region, revision, header, or checksum). Always check the patch notes for required ROM details.
Contact
For bug reports, suggestions, or questions, contact us on the Contact page.
RomPatcher.app is a tool for applying patch files. We do not provide ROMs or copyrighted game files. All trademarks and copyrights belong to their respective owners.