Trezor Bridge

Small background app that enables secure communication between your browser or desktop app and your Trezor hardware wallet (Trezor One & Model T).

What is Trezor Bridge?

Trezor Bridge is a lightweight native helper (background service) that facilitates a secure connection between web-based wallet interfaces (or local apps) and your Trezor device using standard WebUSB/WebHID-like channels. When installed, Bridge lets supported websites and the Trezor Suite detect and communicate with your hardware wallet without exposing private keys to the browser.

How it works

Bridge runs locally on your computer and listens for requests from the browser or desktop app. When a site or app requests access, the connection flow will:

  • Prompt the user to allow the connection (browser permission or app prompt).
  • Relay signing requests to the Trezor device over a secure channel.
  • Display transaction details on the Trezor screen so you can confirm them physically.

Install & Update

Install Bridge from the official source (always verify the domain). Typical steps:

  1. Visit the official Trezor download page (e.g. trezor.io/start).
  2. Download the Bridge installer for your OS and run it.
  3. After installation, refresh your browser or relaunch Trezor Suite — the app should detect your device.
Tip: keep Bridge updated to benefit from security fixes and improved device compatibility.

Security considerations

Bridge is a local helper. Important safety rules:

  • Only download Bridge from the official Trezor website — do not trust third-party builds.
  • Never enter your recovery seed into websites or Bridge — it’s not needed for normal operation.
  • Every transaction must be confirmed on the device screen; Bridge cannot sign without your physical approval.

Troubleshooting

If your browser or app does not detect the device, try these quick fixes:

  • Reconnect device and use the original USB cable.
  • Restart your browser (or the Trezor Suite app).
  • Ensure Bridge is running (check system tray / task manager).
  • Check firewall or antivirus settings — allow Bridge if blocked.
  • Update Bridge to the latest version from the official site.
  • Try a different USB port or computer to isolate the issue.

Advanced & developer notes

Developers can reference the Trezor communication libraries and official docs for integrating Bridge support into web apps. Bridge exposes a local API for authorized requests — always follow best practices for secure handling and never request or log sensitive data like recovery seeds.