Keychron Ultra OpenRGB Firmware Flasher
Flash the custom ZMK / OpenRGB firmware to a Keychron Ultra keyboard, right from your browser. USB only.
Browser not supported
This flasher uses WebHID, which only works in Chromium-based desktop browsers. Please open this page in Google Chrome, Microsoft Edge, or another Chromium browser (Brave, Opera, Vivaldi). Firefox and Safari do not support WebHID.
(This page must also be served over HTTPS for WebHID to work.)
1. Choose firmware
Not sure which one? It matches your keyboard model (for example the Q6 Ultra uses
keychron_q6_ultra_ansi).
Loaded: {{ firmware.name }} - {{ firmware.bytes.length }} bytes,
CRC32 0x{{ firmware.crc.toString(16).padStart(8,'0') }}
{{ loadError }}
2. Connect the keyboard
Plug the keyboard in over USB (not wireless), then connect and identify it. This step is read-only.
3. Flash
{{ logLines.join('\n') }}
Before you flash
- Use the firmware that matches your exact keyboard model.
- The upload is staged and CRC-verified on-device; it only activates after verification, so an interrupted or bad upload will not brick the board (it keeps running the current firmware).
Source and firmware: github.com/naaraxi/zmk · Beta - please report issues.