Trezor Bridge Guide | Secure Connection for Trezor Hardware

Step-by-step presentation for installing, verifying, and troubleshooting Trezor Bridge — secure desktop connectivity for Trezor devices.

Overview

What is Trezor Bridge?

Trezor Bridge is a small, secure helper application that runs on your computer and enables communication between your Trezor hardware wallet and browser-based apps (such as Suite or compatible web wallets). It replaces legacy WebUSB limitations with a background service that safely forwards messages to the device.

Why you need it

  • Ensures reliable communication between browser and device.
  • Improves cross-browser compatibility (Chrome, Firefox, Edge).
  • Provides a secure, signed transport layer—no direct exposure of private keys to the web.

Install — Quick steps

  1. Download the latest Bridge installer for your OS from the official site.
  2. Run the installer and follow on-screen prompts.
  3. Restart your browser (and sometimes your computer) after installation.
  4. Connect your Trezor device via USB and unlock it with your PIN.

Command-line & verification

If you prefer checks or headless setups, verify Bridge is running by checking the local service port (default 127.0.0.1:21325) and confirming process presence in your OS process list.

Troubleshooting

Common issues

  • Bridge not detected — restart browser and reconnect USB.
  • Conflicting USB drivers on Windows — update or re-install USB controller drivers.
  • Firewall or antivirus blocking local connection — allow Bridge through firewall rules.

Advanced tips

  • Use an official cable and a direct PC USB port (avoid hubs when possible).
  • Check for updates for both device firmware and Trezor Suite/Bridge.
  • Inspect browser console logs for bridge-related errors while reproducing the issue.

Security considerations

Bridge acts as a local-only helper. Always download from official domains and verify digital signatures when available. Never enter your recovery seed into a browser or app — Bridge only transmits signed commands to the device; the seed never leaves your hardware wallet.

Best practices
  • Only install Bridge from official sources (links below).
  • Keep your OS and antivirus up to date.
  • Use a hardware firewall or host-level rules if you manage high-value setups.

Integration with Trezor Suite & web apps

Trezor Suite will automatically detect Bridge once installed. For web-based integrations, the Bridge API provides a simple, local JSON-RPC style transport. Developers can use official libraries and SDKs to talk to devices safely.