Trezor Bridge

A short, practical guide — install, use, troubleshoot and secure your Trezor Bridge connection.

Trezor Bridge

What is Trezor Bridge?

Trezor Bridge is a small helper application that allows your web browser to communicate securely with a Trezor hardware wallet connected via USB or USB-C. It runs locally, routes messages between the wallet and web apps (for example the Trezor Suite or compatible wallets), and helps maintain a stable, secure connection.

This page explains how to install Bridge, use it safely, and fix the common issues you might encounter.

Install & run Trezor Bridge

Follow these general steps. Always download Bridge from the official Trezor site or the app's recommended location.

  1. Download: Get the installer for your OS (Windows, macOS, Linux).
  2. Run installer: Accept prompts and complete installation. On macOS you may need to allow the app in System Preferences → Security & Privacy.
  3. Start Bridge: The Bridge usually runs in the background and shows as a small tray/menu icon.
  4. Connect Trezor: Plug in the device and open the web app that uses it. The web app should detect the device via Bridge.

Tip: if a web app asks for permission to access Trezor, confirm on the device when prompted.

Using Trezor Bridge

Once installed, Bridge acts as a local server. Typical flow: open the wallet web app → app detects Bridge → app requests connection → approve on the Trezor device.

Common commands / notes

bridge:// URLs are used by some apps to trigger Bridge actions. You normally don't need to edit any configuration files.

Troubleshooting

Bridge not detected by browser

Try: restart Bridge (quit the tray/menu icon then relaunch), reconnect the device, try another USB cable or port, and ensure the browser isn't blocking local connections.

On macOS: "app blocked" or permission prompts

Open System Preferences → Security & Privacy → General and allow the app. You might need to re-open the installer after granting permission.

Browser warns about connecting to local host

This is expected: Bridge communicates locally. Only connect if you're using a trusted wallet web app and you downloaded Bridge from the official source.

If problems persist, check the official documentation or reach the Trezor support channels provided by the vendor.

Security tips

  • Always download Bridge only from official Trezor sources.
  • Keep Bridge and Trezor device firmware up to date.
  • Never enter your seed or recovery phrase into any computer or website — the Trezor device displays and signs transactions on-device.
  • Use a trustworthy, up-to-date browser and avoid unknown browser extensions when using wallet apps.

FAQ

Do I need Bridge to use a Trezor?

Many modern wallets use Bridge to connect via USB. Some apps (like native Trezor Suite) may bundle the necessary connectivity without installing Bridge separately.

Is Bridge safe?

Bridge is a local helper app that only communicates between your browser and device. Its safety depends on obtaining the software from trusted sources and maintaining good device hygiene.

Where can I download it?

Always use official links recommended by Trezor or the wallet developer. Avoid third-party downloads.