KoboPatch Web UI

A fully client-side web application for applying kobopatch patches to Kobo e-readers. No backend required — runs entirely in the browser using WebAssembly.

Features

Auto mode (Chromium): detect your Kobo model and firmware via the File System Access API, then write the patched file directly back to the device
Manual mode (all browsers): select your model and firmware version from dropdowns, download the result
Firmware is downloaded automatically from Kobo's servers
Step-by-step wizard with live build progress
Patch descriptions and PatchGroup mutual exclusion

How it works

Connect your Kobo via USB (or select your model/firmware manually)
Enable/disable patches in the configurator
Click Build — firmware is fetched from Kobo's CDN, patches are applied via WASM in a Web Worker
Write KoboRoot.tgz to your device or download it manually
Safely eject and reboot your Kobo

Building

Prerequisites

Go 1.21+ (for compiling kobopatch to WASM)

Setup & build

cd kobopatch-wasm
./setup.sh    # clones kobopatch source, copies wasm_exec.js
./build.sh    # compiles WASM, copies artifacts to src/public/

Running locally

Any static file server works:

python3 -m http.server -d src/public/ 8888

Then open http://localhost:8888.

Supported devices

Currently supports firmware 4.45.23646 for:

Kobo Libra Colour
Kobo Clara BW (N365)
Kobo Clara BW (P365)
Kobo Clara Colour

Additional firmware versions can be added by placing patch zips in src/public/patches/ and updating index.json and the firmware URL map in kobo-device.js.

License

kobopatch is by pgaskin. Patches are community-contributed via MobileRead.

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