Trezor Bridge — Secure Connection for Your Trezor®

A clear, practical guide to what Trezor Bridge does, how to set it up, secure your connection, and troubleshoot common issues. Includes a compact FAQ and quick links to official resources.

Written for users who want a secure USB/host bridge between their device and browser apps. Includes official links repeated for convenience.

What is Trezor Bridge?

Trezor Bridge is a small background application that creates a secure, local connection between your computer and your Trezor hardware wallet. It replaces legacy browser USB support and allows desktop browsers (and Trezor Suite) to communicate with your device without exposing the device to remote networks.

Why Bridge matters

Modern browsers have varied USB support; Trezor Bridge standardizes communication and prevents accidental web-based direct USB access. It keeps the hardware wallet interaction local, encrypted, and explicitly initiated by the user.

Official: trezor.io/start Official: trezor.io/start Official: trezor.io/start Official: trezor.io/start Official: trezor.io/start

How Trezor Bridge works (simple)

Local signed connection

When installed, Bridge runs as a small background service on your computer. It listens on the local loopback interface, accepts requests from authorized browser tabs or applications, and forwards them to the connected Trezor device using a secure protocol. No private keys or seed words ever leave the Trezor itself.

Security model

All critical crypto operations (signing, key derivation) occur on the Trezor device.
Bridge simply forwards API requests locally — it's a translator, not a key holder.
Install only from official sources to avoid malicious replacements. Official setup: trezor.io/start.

Supported platforms

Windows, macOS and Linux builds are available. Trezor Suite and many web-based wallet interfaces will detect Bridge if it's installed.

Install & Setup — step-by-step

Visit the official page and download Bridge: trezor.io/start.
Run the installer and allow the background service to start.
Connect your Trezor device with the original cable and open Trezor Suite or your browser wallet.
Grant permissions when the browser prompts to allow connection to Bridge.
Complete device authentication on your Trezor (PIN / passphrase) as required.

If you're unsure where to download, always use the official link: trezor.io/start.

Troubleshooting: common issues

Bridge not detected

Try these quick fixes:

Restart your browser and/or computer.
Make sure the Bridge service is running (look for "Trezor Bridge" in system processes).
Try a different USB port or cable (some cables are power-only).
Reinstall Bridge from the official source: trezor.io/start.

Permissions prompt not appearing

Clear browser cache or try an incognito/private window; ensure no enterprise policies block USB devices.

FAQ

Q: Is Trezor Bridge safe?: A: Yes—Bridge is a local service that never transmits your seed phrase or private keys. Its role is to mediate between your browser and the hardware device. Always install Bridge from the official site above.
Q: Do I need Bridge to use Trezor?: A: For many desktop/browser workflows, yes. Trezor Suite bundles compatibility, but web-based wallet integrations commonly rely on Bridge for secure USB access.
Q: Can Bridge be used remotely?: A: No. Bridge operates on your local machine and listens on localhost. Remote access would require additional software and is not supported by default for good security reasons.
Q: How do I update Bridge?: A: Download the latest installer from the official link and run it. The installer updates the running service safely. Official download: trezor.io/start.
Q: What if my OS blocks installation?: A: On macOS, you may need to allow the installer in Security & Privacy. On Windows, run the installer as Administrator. If in doubt, consult the official guide at trezor.io/start.