Trezor Bridge — Secure Device Communication

Trezor Bridge connects your browser to your Trezor hardware wallet for secure device communication, safe signing, and trusted browser-to-device flows.

Quick overview — what is Trezor Bridge?

Trezor Bridge is the official background connector that enables secure device communication between your Trezor hardware wallet and desktop or web applications. Whether you use Trezor Suite, supported web wallets, or developer tools, Trezor Bridge provides an encrypted, authenticated, and reliable bridge for signing transactions and managing accounts without exposing private keys.

Why secure device communication matters

Hardware wallets like Trezor keep private keys offline. To interact with applications, you need a secure channel: Trezor Bridge implements that channel so your browser can request signatures while you confirm each action on the physical device. This browser-to-device model protects users from phishing, malware, and remote signing attacks by making the device the single source of truth.

Download & install

Always download Trezor Bridge from the official site at trezor.io/start. Choose the platform-specific installer (Windows, macOS, Linux) and follow instructions. After installation, the Bridge runs in the background and exposes a local, secure API for web pages and apps to detect and talk to your hardware wallet.

Step-by-step setup (fast)

  1. Download: visit trezor.io/start and download Bridge.
  2. Install: run the installer and allow required permissions if prompted.
  3. Connect: plug your Trezor device in via USB; Bridge will detect the device.
  4. Confirm: open Trezor Suite or a supported web app and approve the connection on the device screen.

Browser to device flow

When you perform an operation like signing a transaction, the web app requests the browser to call the Bridge. The Bridge routes the request to the device and prompts you to confirm the details directly on the Trezor screen — ensuring secure device communication and a tamper-resistant confirmation step.

Security best practices

  • Official sources: always install Trezor Bridge from trezor.io to avoid malicious copies.
  • Confirm everything on-device: verify address and amounts shown on the Trezor hardware before approving.
  • Keep software updated: update Trezor Bridge and Trezor Suite regularly for security patches and compatibility improvements.
  • Isolate sensitive actions: perform critical operations on trusted machines, avoid public/shared computers.

Troubleshooting & tips

If your browser doesn't detect the device: ensure Bridge is running, reconnect the USB, try another port, or restart the browser. On macOS, grant Bridge the necessary OS permissions; on Linux, check udev rules. If you see permission errors, run the local Bridge diagnostics (the installer includes a diagnostics guide).

Developer & advanced features

Trezor Bridge exposes a local endpoint used by the official Trezor Connect libraries and developer tools. Advanced users can enable debug logs, use proxy settings for restricted networks, or run a portable AppImage on Linux. The Bridge logs are useful for support, and Bridge supports encrypted, mutually authenticated channels for added trust.

Pro tip: Verify the device fingerprint and confirm transaction details on the Trezor screen — the device is the final arbiter in secure device communication.

Why choose Trezor Bridge

Trezor Bridge is lightweight, secure, and designed specifically to enable browser-to-device communication for hardware wallets. It maintains privacy (no seed or keys leave the device), gives developers a predictable interface, and provides users with a reliable, secure channel that minimizes the attack surface between web applications and your hardware wallet.

For installation and official downloads, go to trezor.io/start