What is Trezor Bridge?

Trezor Bridge is a small application that lets your web browser or desktop app communicate with your Trezor hardware wallet via USB. It acts as a secure bridge between the device and software (like Trezor Suite or web-based wallet interfaces), enabling safe transaction signing and device management without exposing your private keys.

This guide explains why Bridge matters, how to install it, how it works, and how to fix common connection issues. The goal: make setup predictable and safe for every user.

Install & Setup

Step 1 — Download

Always download Trezor Bridge from the official site. Choose the installer for your operating system (Windows, macOS, or Linux). Verify the file checksum when available to avoid tampered downloads.

Step 2 — Run the Installer

Run the downloaded file and follow the simple installer prompts. The app runs in the background and installs a local USB driver that allows secure communications between browser or desktop wallet and your Trezor device.

Step 3 — Connect Your Device

After installation, connect your Trezor hardware wallet via USB. Open your web wallet or Trezor Suite; the app should detect the device. If prompted, confirm the connection on the device screen and enter your PIN to unlock.

Tips for macOS & Linux

  • macOS: You may need to allow the app in System Settings > Privacy & Security if macOS blocks the installer.
  • Linux: Some distributions require installing udev rules or running the app with appropriate permissions—follow the official instructions for your distro.

How Trezor Bridge Works

Trezor Bridge runs locally on your computer and listens for connections from trusted wallet apps. When you initiate a transaction, the wallet sends the unsigned transaction to the device through the Bridge. You confirm details on your Trezor’s screen and the device signs the transaction, sending back only the signed data — your private keys never leave the hardware.

Security model

The Bridge only transports messages — it does not store your seed, passwords, or account data. Communication is performed locally; Bridge does not transmit sensitive data to external servers.

Troubleshooting

Common issues

If your device is not recognized, try these quick checks:

  • Ensure the cable is data-capable (some cables only charge).
  • Try a different USB port or a new cable.
  • Restart your browser or the Trezor Suite app.
  • Reboot your computer if the device still isn’t detected.

Bridge not running?

On Windows and macOS, look for the Bridge icon in the system tray or menu bar. If missing, relaunch the application from your programs folder. On Linux, check whether the process is running and whether udev rules are in place.

Permission errors (macOS)

macOS may block unsigned apps or require permission to access USB. Go to System Settings > Privacy & Security, and allow the Bridge installer or application if it is listed.

Still stuck?

Collect logs and reach out to support with details: operating system, browser version, Trezor model, Bridge version, and the exact symptom. This speeds up resolution.

Security Best Practices

  • Download Bridge only from official sources and verify checksums.
  • Keep your Trezor firmware and desktop/web wallet up to date.
  • Never share your seed phrase—Trezor Bridge will never ask for it.
  • Confirm addresses and amounts on your Trezor device screen before approving transactions.

FAQ

Do I need Bridge for Trezor Suite?

Trezor Suite desktop app includes its own native connection method; Bridge is primarily for browser-based wallet access. Use the recommended option for your setup.

Is Bridge safe?

Yes—Bridge is a local application used to pass messages between your computer and device. It doesn’t store private keys or seed phrases.

Can I uninstall Bridge?

Yes — uninstall like any other app through your OS’s app removal process. Re-install when needed.