Canonical: https://rom-weaver.com/create-rom-cheat-patch

# Create ROM patches from cheat codes online | rom-weaver

Create a ROM patch from supported cheat codes locally in your browser. Choose a patch format and download the patch without uploading your ROM.

[Open in browser](https://rom-weaver.com/create-rom-cheat-patch)

[Documentation](https://rom-weaver.com/docs.md)

[Full guide](https://rom-weaver.com/docs/create-rom-patches.md)

## Build from patches and cheats

Choose **Patches & cheats** on **0x03 Modified**, or open [Create a patch from cheat codes](<https://rom-weaver.com/create-rom-cheat-patch>), which starts in that mode; the step becomes **0x03 Changes**. Patch uploads, including archives, select this mode automatically. Switching modes preserves your inputs.

1. Add one clean **Original** ROM; multi-file ROMs are unsupported. If an Original is already loaded, choose whether the new ROM replaces it or becomes the **Modified ROM**.
2. Add patches or choose **Add cheats to the patch order**.
3. Select database cheats or use **Add code manually**.
4. Order the enabled changes and resolve input-check or cheat warnings.
5. Choose the patch filename and format, then **Create patch & download**.

The patch reproduces these changes when applied to the Original ROM. Try the [guided cheats tour](<https://rom-weaver.com/create-rom-patch?guide=create-cheats>), or check [supported-code limits](<https://rom-weaver.com/docs/use-cheats.md>).

Expand **Download patched ROM** for ROM compression options, or **Download the weave** to share. See [weave packaging](<https://rom-weaver.com/docs/create-bundles.md#build-the-patch-recipe>) when cheats are enabled.