Trezor Bridge

What is Trezor Bridge?

Trezor Bridge is a lightweight software developed by SatoshiLabs that facilitates communication between your Trezor hardware wallet and supported web applications, such as Trezor Suite Web. It runs in the background on your operating system, acting as a secure gateway between your device and browser.

Without Trezor Bridge, your browser can't reliably detect or interact with your hardware wallet—especially in environments that don’t support WebUSB or WebHID natively.

Why Do You Need Trezor Bridge?

• 💻 Browser Compatibility: Enables Trezor use in Chrome, Firefox, Brave, and more.
• 🔐 Secure Communication: Ensures data never leaves your Trezor device unencrypted.
• ⚙️ System Integration: Makes your wallet accessible to browser-based and desktop apps.
• 🛠️ Low Resource Usage: Runs quietly in the background with minimal CPU/memory use.
• 🧩 Fallback for WebUSB: When browser support fails, Bridge keeps your connection alive.

How to Install Trezor Bridge

Step 1: Visit the Official Page

Go to the official download page at trezor.io/bridge. Always ensure you’re on the correct URL to avoid fake software.

Step 2: Download for Your OS

Select your platform:

• Windows (.exe)
• macOS (.pkg)
• Linux (.tar.gz or .deb)

Step 3: Install the Bridge

Run the installer. You may need admin privileges to complete the process. Once installed, Trezor Bridge will start running automatically in the background.

Step 4: Connect Your Trezor Device

Plug in your Trezor Model One or Model T. Navigate to Trezor Suite Web and confirm that the browser detects your device.

Step 5: Approve Communication

Your browser may prompt you to allow Trezor Bridge. Once permission is granted, you're ready to use all features of your hardware wallet.

Troubleshooting Trezor Bridge

• Bridge not detected? Try restarting your browser or reconnecting your Trezor.
• Permission denied? Check browser permissions under “Site Settings.”
• Multiple devices? Use one Trezor at a time to avoid USB conflicts.
• Firewall issues? Ensure that Trezor Bridge is allowed through your firewall.
• Linux users: You may need to install udev rules for USB access.

How Trezor Bridge Works Behind the Scenes

Trezor Bridge sets up a local communication layer between your hardware wallet and browser over HTTP/WebSockets. It uses a small background service that listens on localhost and forwards commands from the browser to your Trezor device.

While the user interface never changes, it enables full Trezor functionality without needing browser extensions or additional drivers.

Security and Privacy

Trezor Bridge doesn’t store any user data or private keys. All cryptographic operations happen on the Trezor device itself. Bridge merely acts as a communication relay. It cannot sign transactions or access your funds independently.

• ✅ Open-source and auditable
• ✅ No tracking or analytics
• ✅ Auto-updates when new versions are released

Bridge vs. WebUSB: What’s the Difference?

In modern browsers like Chrome and Brave, Trezor can use WebUSB to connect directly. However, many environments still require Trezor Bridge as a fallback.

• WebUSB: Works well, but sometimes blocked by browser updates or OS policies.
• Trezor Bridge: More consistent across platforms and doesn't rely on browser APIs.

Tip: Trezor Suite will automatically choose the best connection method available.

Developer Information

If you’re a developer integrating Trezor support into your DApp or platform, you don’t need to worry about Trezor Bridge separately. Just use:

• Trezor Connect – JavaScript API for web apps
• Trezor Docs – Official documentation

Trezor Connect automatically detects whether Trezor Bridge or WebUSB is required.