Trezor Bridge

Small, local helper for secure communication between your Trezor hardware wallet and apps.

Overview

Trezor Bridge is a lightweight background utility that establishes a secure, local channel between a Trezor hardware wallet and desktop or web applications. It translates low-level device messages into standard HTTP/WebSocket calls so browser-based wallets and desktop apps can interact with the device without direct USB complexities. The Bridge is intentionally limited in scope — it only forwards traffic to the local device and does not transmit private keys or seeds off your machine.

Why Bridge exists

Hardware wallets like Trezor isolate private keys inside a secured device. Browsers cannot talk to these devices directly in a consistent way across platforms; the Bridge solves this by acting as a trusted local helper that speaks both the device protocol and web-friendly transports.

Key features

Secure local proxy
Only local traffic, no cloud relay — your transactions remain on your computer and device.
Cross-platform support
Available for Windows, macOS, and Linux installers or packaged within Trezor Suite where applicable.
Simple install & auto-updates
Small installer with automatic background launch on login (optional).
Compatibility with web apps
Works with browser-based wallets and the official Trezor Suite to provide a smooth UX.

How it works (simple)

  1. Install Bridge or use Trezor Suite which bundles the necessary connectivity.
  2. Bridge runs a local HTTP/WebSocket endpoint (e.g., http://127.0.0.1:21325 — implementation details may vary).
  3. When you connect your Trezor, the web app requests the Bridge to enumerate devices and forward messages to the hardware.
  4. All cryptographic operations remain inside the hardware; Bridge merely passes requests and responses.

Install & use

For most users the recommended route is to use the official Trezor Suite desktop app. If you prefer a lightweight setup for a web-only workflow, installers were historically provided for each OS. Always download Bridge or Suite from the official Trezor website or verified distribution channels.

Security notes

Bridge is a local helper — treat it as system software. Only install from official sources and keep your operating system up to date. If you ever suspect compromise, unplug your Trezor and verify checksums or reinstall from the verified distribution.

Developer & advanced

Developers building integrations should rely on the official client libraries and follow the official API and security guidelines. The Bridge protocol is stable but always check official dev docs for breaking changes and recommended best practices.

This page is informational; consult the Trezor docs and releases for exact download links, checksums, and platform-specific instructions.