Trezor Bridge

What is Trezor Bridge?

Trezor Bridge is a software utility that allows your Trezor hardware wallet to communicate securely with your browser or Trezor Suite app. It replaces older browser plugins and provides a consistent, secure, and stable communication channel between your computer and your Trezor device.

Designed for reliability and safety, Bridge runs quietly in the background, enabling all Trezor-supported apps to recognize your device and transmit commands without risk of interference from malicious scripts or extensions.

Why Use Trezor Bridge?

• Secure Local Communication: Uses local-only ports and encrypted data flow.
• Browser Compatibility: Works with Chrome, Firefox, Brave, and other major browsers.
• No Extensions Required: Reduces the attack surface by eliminating dependency on browser plugins.
• Cross-Platform: Available for Windows, macOS, and Linux.
• Official and Open Source: Maintained by SatoshiLabs with community transparency.

How It Works

Trezor Bridge runs as a background process (a small local server). It listens on your local machine (usually on localhost:21325) and handles device communications on behalf of any web app or service that interacts with Trezor.

Typical Connection Flow:

1. User plugs in the Trezor device via USB.
2. The browser or Suite checks for the presence of Bridge.
3. Bridge routes signed messages and data between the app and the Trezor device securely.
4. All sensitive information (like private keys) stays isolated on the Trezor device.

Installing Trezor Bridge

Installing Trezor Bridge is easy and takes just a few minutes. Visit the official download page and follow the steps for your OS:

• trezor.io/bridge
• Download the installer for your OS
• Run the installation and follow on-screen instructions
• Restart your browser after install

Security Benefits

One of the primary goals of Trezor Bridge is to reduce reliance on insecure or outdated browser APIs and extensions. By creating a secure tunnel between your device and Trezor Suite, it shields users from many common attack vectors.

• ✔️ No exposure to browser exploits
• ✔️ Prevents phishing extensions from hijacking transactions
• ✔️ Operates only on local host
• ✔️ No external ports or network access

Troubleshooting Tips

Browser Doesn’t Detect Trezor

Make sure Bridge is installed and running in the background. Try restarting your browser, or check for antivirus software blocking the connection.

Bridge Not Starting

On Linux, ensure the service is executable. You may need to give permissions via terminal: chmod +x trezord

Ports Blocked?

Make sure port 21325 is not in use by another service. Use netstat or lsof to check bindings.

Supported Systems

• Windows: 10, 11 and later
• macOS: Mojave and later
• Linux: Ubuntu, Debian, Fedora, Arch

Bridge vs WebUSB

Some browsers support WebUSB which enables direct access to USB devices like Trezor. However, Bridge provides broader compatibility, stability, and security in most environments. WebUSB is a useful fallback, but Trezor still recommends using Bridge when possible.

Is It Open Source?

Yes. Trezor Bridge is fully open-source and available on GitHub: github.com/trezor/trezord-go.

Conclusion

Trezor Bridge is the foundation of secure desktop interaction between your Trezor wallet and modern apps. It’s simple, powerful, and invisible when everything works — exactly the way security should be.

By installing and using Trezor Bridge, you're taking a big step toward ensuring your digital assets are managed with maximum care and minimum risk.