A browser-based tool to manage files and update firmware on Pixl.js-based NFC devices over Bluetooth. No app, no drivers, nothing extra.

Try it (requires Chrome, Edge, or Brave).

Connect your device and manage its storage directly from the browser:

• File browser: navigate folders, rename, delete, and multi-select files
• Tree uploader: drop a local folder or files to upload with real-time progress
• Sync: diff local and device trees, push changes, and remove orphaned files
• Normalize: lowercase-rename files and folders for firmware compatibility
• Format: wipe and reformat the device drive
• NFC tag lookup: .bin files show character name and series from AmiiboAPI

Flash firmware directly over Bluetooth using Nordic Secure DFU. No extra tools required.

• Auto-detect device mode: connects to devices in normal or update mode from a single flow
• Connected shortcut: devices already paired from the file browser reboot into update mode automatically, no extra pairing needed
• Release picker: choose from the built-in release list or use a local .zip file
• Live progress: real-time transfer speed, progress bar, and stage-by-stage status
• Resilient transfers: packet receipt notifications, CRC verification, and automatic retry on failure
• Update notifications: badge when a newer firmware version is available

Compatible with Pixl.js-based devices (allmiibo, amiibotool, Wuzplay, Flashiibo, and others).

To run the app locally:

# Generate a self-signed cert (one-time)
mkdir -p .cert
openssl req -x509 -newkey rsa:2048 -keyout .cert/key.pem -out .cert/cert.pem \
  -days 365 -nodes -subj "/CN=localhost"

# Start the dev server (HTTPS at localhost:8443)
python3 server.py --cert .cert/cert.pem --key .cert/key.pem

Click Mock device in the top bar to simulate a connected device without hardware. The button is only visible in local dev mode.

MIT. See LICENSE.

• JSZip for reading firmware .zip packages in the browser
• Material Symbols for iconography
• IBM Plex Mono for monospace typography

• solosky/pixl.js for the open-source firmware that makes all of this possible
• thegecko/web-bluetooth-dfu for the original Web Bluetooth Nordic Secure DFU implementation that served as the foundation for the firmware update module
• Nordic Semiconductor for the Secure DFU protocol specification and reference implementations
• AmiiboAPI for the NFC tag character database