Trezor Bridge

What is Trezor Bridge?

Trezor Bridge is a background application that establishes a secure connection between your Trezor hardware wallet and supported applications, including Trezor Suite and browser-based crypto tools. By running a local communication tunnel, it ensures your device operates seamlessly with maximum security.

Why Use Trezor Bridge?

Unlike browser extensions or direct USB access, Bridge runs silently and securely on your device. It minimizes risks associated with browser plugins, and supports broader device compatibility with increased stability.

• 🔒 Encrypted local communication
• 🌐 Works on Windows, macOS, Linux
• 🧩 No need for browser extensions
• ⚡ Auto-launches with system boot
• 🛡️ Resistant to browser-based attacks

Use Smart Keys:

• Ctrl + Shift + R — Restart your browser and Bridge
• Cmd + Space — Spotlight to find “Trezor Bridge” on macOS
• Alt + Tab — Quickly switch between Bridge and Suite

How Trezor Bridge Works

Trezor Bridge operates as a local server, listening on localhost:21325. When you open Trezor Suite or a supported DApp, the app communicates with Bridge, which relays data to the Trezor device over USB.

Behind the Scenes:

1. Connect your Trezor via USB
2. Trezor Suite sends a request through Bridge
3. Bridge communicates securely with the Trezor device
4. Device responds — all keys stay on the device

Installation Guide

Follow these steps to install Trezor Bridge:

• 1. Go to https://trezor.io/bridge
• 2. Download the correct version for your OS
• 3. Run the installer
• 4. Restart your browser
• 5. Open Trezor Suite and connect your device

Troubleshooting Tips

Device not detected?

Make sure Trezor Bridge is running. Use Task Manager or Activity Monitor to confirm. Restart both the app and browser.

Port conflict (21325)?

Use netstat or lsof to check if other software is occupying the same port. Free the port and relaunch Bridge.

Security Advantages

Trezor Bridge removes dependency on vulnerable browser-based USB APIs. It works as a local proxy, shielding your hardware wallet from man-in-the-browser attacks.

• ✅ Keys stay offline
• ✅ Doesn’t expose sensitive requests to the browser
• ✅ Auto-updates for enhanced security

Advanced Configuration

Advanced users can run Trezor Bridge with custom flags, logs, and port settings:

• --debug — Enable logging for diagnostics
• --port 3000 — Change default port
• --no-browser — Disable browser check on launch

FAQs

Can I use Trezor without Bridge?

Some features may work with WebUSB, but Trezor recommends Bridge for full compatibility and security.

Does Bridge update automatically?

Yes, if installed via the official package. Manual installations may need periodic updates from the website.

Is it open-source?

Absolutely! The source code is publicly available at trezord-go on GitHub.

Conclusion

Trezor Bridge plays a critical role in ensuring safe, smooth, and secure access to your cryptocurrency assets. Whether you're sending coins, managing tokens, or verifying addresses, Bridge ensures that your Trezor device remains at the center of a secure and seamless experience.