Trezor Bridge

A lightweight, secure bridge to connect your Trezor hardware wallet and browser-based apps.

What is Trezor Bridge?

Trezor Bridge is the small system component that enables secure, reliable communication between your Trezor hardware wallet and software on your computer — most commonly web wallets and the Trezor Suite. It sits between the USB stack and the web application, translating requests, forwarding transactions, and ensuring the device is discoverable and trusted by modern browsers.

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Security first
Bridge does not access private keys — it only transports signed data and device instructions. It’s designed so sensitive operations stay on-device.
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Fast & dependable
A tiny background service with minimal footprint that keeps your Trezor reliably accessible to supported apps without repeated permissions prompts.
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Cross-platform
Available for Windows, macOS, and Linux with straightforward installers and automatic updates for security patches.

How it works — simply

When you connect your Trezor via USB, the Bridge service listens for incoming requests from compatible apps. A site or desktop app requests a connection; Bridge verifies the request origin and forwards it to the device. The user validates operations (like signing a transaction) directly on the Trezor device, and only the signed response returns through Bridge to the requesting application. This separation keeps private keys within the hardware at all times.

Who should use Bridge?

Anyone using a Trezor hardware wallet with web or desktop apps that support Trezor should install Bridge. It’s especially useful for users who access decentralized apps (dApps), decentralized exchanges, or manage multiple accounts via browser-based wallets. Bridge makes the device present and accessible across browsers that restrict direct USB access.

Tips for a smooth experience

  • Install the latest Bridge version from official sources to ensure compatibility and security.
  • Keep your device firmware updated — Bridge and firmware work together for full functionality.
  • If a browser can’t find your device, try reconnecting the USB cable, restarting the Bridge service, or checking browser permissions.

Developer note

Bridge exposes a small API surface used by wallet authors. It intentionally limits permissions and stays conservative in its behavior. If you build a web app that integrates Trezor, always rely on the official libraries and follow the device interaction patterns to preserve user security and UX consistency.