Trezor Bridge – Install, Use, and Troubleshoot

Trezor Bridge — Secure Browser Connectivity for Trezor Devices

Trezor Bridge is the official helper application that enables secure, local communication between your web browser and your Trezor hardware wallet.

What is Trezor Bridge?

Trezor Bridge is a small, trusted background application developed by SatoshiLabs that allows websites (like Trezor.io/start) and browser-based wallets to communicate with a connected Trezor hardware wallet over USB or WebUSB. It provides a stable and secure channel so your browser can detect the device, request user approval, and request transaction signatures — while your private keys stay offline on the device.

Why Trezor Bridge matters

Compatibility: Bridges browser restrictions to support device communication across major OS and browsers.
Security: Keeps sensitive signing operations on-device; Bridge simply brokers the connection.
Usability: Avoids manual driver installs for most users and simplifies the setup flow.

How to Download & Install Trezor Bridge

Open your browser and go to the official page: trezor.io/start.
Select Trezor Bridge and choose the installer for your operating system (Windows / macOS / Linux).
Run the downloaded installer and follow the on-screen instructions. On macOS, allow the app in Security & Privacy if prompted.
After install, connect your Trezor device via USB. Visit an official web interface (Trezor Suite Web or supported dApp) to confirm the browser detects your device.

Using Trezor Bridge with Browsers & Apps

Once installed, Trezor Bridge runs in the background. When you connect your Trezor and open a compatible site, the site will request access to the device. You will always confirm actions (like entering your PIN or approving a transaction) directly on the Trezor device screen.

Tip: Always ensure you are on the official site (look for trezor.io) before approving any transaction.

Troubleshooting Common Trezor Bridge Issues

If your browser does not detect the device

Verify Trezor Bridge is installed and running. On Windows it appears in the tray; on macOS check Activity Monitor.
Try reconnecting the USB cable or using a different USB port/cable (data-capable cable required).
Restart your browser (fully quit and reopen) and reconnect the device.
Make sure your browser supports the communication method (modern Chrome, Edge, Brave generally work best).

macOS: Security & Privacy block

If macOS blocks the installer, open System Preferences → Security & Privacy and allow the app. You may need to reinstall after granting permission.

Still having problems?

Visit official Trezor support at trezor.io/support for step-by-step guides and latest downloads.

Security & Privacy Notes

Bridge is not a wallet: Trezor Bridge never touches your keys or recovery seed — it only allows local communication.
Confirm on device: Always verify transaction details on the Trezor device screen before approving.
Download only from trezor.io: Avoid third-party installers to prevent tampered software.
Keep Bridge updated: Updates may include security fixes and improved browser compatibility.

Frequently Asked Questions (FAQs)

Q: Do I need Trezor Bridge to use Trezor?

A: For browser-based interactions (WebSuite, web wallets, dApps) Trezor Bridge is recommended. Trezor Suite desktop app uses direct connection and may not require Bridge.

Q: Is Trezor Bridge safe?

A: Yes — it's published by SatoshiLabs and only facilitates local device communication. Always use the official installer and keep it updated.

Q: Which browsers work best with Trezor Bridge?

A: Current Chromium-based browsers (Chrome, Edge, Brave) typically offer the most reliable experience. Firefox may require additional steps or permissions.

Q: Can Bridge run on multiple devic