rom-weaver

7.0easy start · #4 of 20
in ROM Patching Software

Free to practise onyes
Free trialnot on record
Well documentedyes
Runs where you workyes

Runs on Linux, Mac, self-hosted, Web, Windows.

rom-weaver is ranked #4 of 20 in ROM patching software on The Geeks Club. It runs on Linux, macOS, Self-hosted, Web, Windows. There is a free plan.

rom-weaver plans and pricing

All plans

Free and open-source Free No account required · browser and command-line versions rom-weaver.com · 29 Sept 2026

Compared on ROM patching software

Free plan: Yes
Patch formats: IPS, IPS32, SOLID, BPS, UPS, VCDIFF, xdelta, GDIFF, HDiffPatch/HPatchZ, APS, APSGBA, RUP, PPF, PAT, EBP, BDF/BSDIFF40, BSP, MOD, DLDI, DPS, DCP
Supported platforms: cross_platform
Batch patching: Yes
Checksum verification: Yes
Original backup: Yes
Command-line support: Yes

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The record

Purpose: rom-weaver patches, converts, and bundles ROMs and disc images using the same engine in its browser and command-line versions.
Patch workflows: It can apply patches, create patches from ROMs, and package ordered patch workflows as reusable bundles.
Supported patch formats: The support matrix lists formats including IPS, IPS32, BPS, UPS, xdelta, PPF, and others for applying or creating patches, with some format-specific limits.
File conversion: It supports probing and extracting many archive and compressed image formats, including ZIP, 7z, RAR, CHD, RVZ, and Z3DS; creation support varies by format.
Cheats: Users can bake supported ROM cheat codes into ROMs or save selected database cheats as patch files; runtime-memory cheats are marked unsupported.
Save editing: The Save Editor supports specified Pokémon save layouts and The Legend of Zelda: A Link to the Past SRAM, with recognition limits listed by game.
Local processing: The browser processes files with WebAssembly on the device, and the CLI reads and writes local paths; the maker says ROMs, patches, and results are not uploaded to its server.
Privacy details: The webapp says it has no analytics, advertising, or tracking scripts and sets no advertising or tracking cookies; it stores app data in browser storage.
Offline use: The maker says the browser app works offline after it has cached the app.
Integration: Hosts can preload browser workflows with bundle, ROM, and patch URLs or ingest files from same-origin OPFS storage; remote sources must allow the app origin through CORS.
Self-hosting: The webapp is a static app that can be self-hosted from a Docker image or static files, and requires HTTPS outside localhost.
CLI platforms: The CLI provides release binaries for macOS, Linux, and Windows, with architecture variants listed on its install page.
Support: The maker directs bugs, format requests, and questions to the GitHub issue tracker and says security reports have a separate process.
License and maker: The project is written by Brandon Casey and contributors and is licensed under GNU AGPL v3.0 or later.
Price from: Free

Where it ranks on The Geeks Club

Best ROM Patching Software in 2026#4 of 20

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Sources

rom-weaver.com/docs/about· checked 29 Sept 2026
rom-weaver.com· checked 29 Sept 2026
rom-weaver.com/docs/supported-formats· checked 29 Sept 2026
rom-weaver.com/docs/use-cheats· checked 29 Sept 2026
rom-weaver.com/docs/game-save-support· checked 29 Sept 2026
rom-weaver.com/docs/privacy· checked 29 Sept 2026
rom-weaver.com/docs/faq· checked 29 Sept 2026
rom-weaver.com/docs/webapp-integration· checked 29 Sept 2026
rom-weaver.com/docs/self-hosting· checked 29 Sept 2026
rom-weaver.com/docs/install· checked 29 Sept 2026