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Trezor Bridge

A lightweight local bridge to connect your Trezor hardware wallet to web apps.

What is Trezor Bridge?

Trezor Bridge is a small background application that enables secure communication between a Trezor hardware wallet and your browser. It replaces native browser USB access with a local HTTP interface so official wallets and web-based tools can talk to the device safely.

Why it's needed

Browsers vary in how they allow USB access and may break direct communication. Trezor Bridge standardizes the connection, improving compatibility and reducing prompts or permission issues.

  • Compatibility with major browsers
  • Reliable USB handling across OSes
  • Minimal local footprint

Quick install

  1. Download the official Bridge from Trezor's website.
  2. Run the installer and allow the app to run in the background.
  3. Open your wallet web app; it should detect your device automatically.

Only install Bridge from the official source. Avoid third‑party downloads to reduce risk.

Security notes

  • Bridge only runs locally and does not transmit your private keys.
  • Verify downloads via Trezor.io and keep the app updated.
  • Use official wallet software and check site certificates.

Troubleshooting

Common fixes: restart Bridge, replug the device, try a different USB port, or restart your browser. If problems persist, consult official support.

How Trezor Bridge Works

Trezor Bridge runs as a local service on your computer. When you connect your Trezor device, supported applications send communication requests through Bridge instead of accessing USB directly. This design improves stability and keeps sensitive processes isolated from the browser.

  • Uses local HTTP communication channels
  • Improves reliability for web-based wallets
  • Reduces risk of browser-related communication bugs

Bridge vs. WebUSB

While WebUSB allows browsers to interact with hardware devices without additional software, not every browser supports it consistently. Trezor Bridge ensures your device works across Chrome, Firefox, and other browsers without dependency on specific APIs.

If you notice your browser failing to detect your wallet, switching to Bridge often resolves the issue instantly.

Best Practices for Users

  • Keep Trezor Bridge updated for maximum compatibility.
  • Restart the service occasionally if detection slows down.
  • Use official cables for consistent USB connectivity.
  • Do not run multiple wallet apps simultaneously to avoid port conflicts.