✨ Made with Daftpage

Why Trézor Bridge® Matters

Hardware wallets keep your private keys offline, but many wallets and decentralized applications run inside web browsers. Trézor Bridge® fills that gap: it creates a controlled communication layer so web apps can request signatures and account data from your Trezor device without exposing secrets. The Bridge is purposely minimal, focused on reliability, security, and compatibility.

Security-first

Only the required data passes through the Bridge. The private keys never leave your Trezor device, and requests must be approved physically on the device.

Cross-platform

Runs on Windows, macOS, and Linux. Works with major browsers that support secure native messaging and USB connections.

Lightweight & reliable

Small footprint and fast startup — designed to reliably manage USB or WebUSB sessions between your computer and device.

Developer-friendly

Open protocols and clear APIs make it easy for wallets, dapps, and tools to integrate with Trezor devices safely.

How Trézor Bridge® Works — At a Glance

The Bridge establishes a local, secure channel between a web application (or desktop app) and the Trezor hardware device. Typical flow:

  1. The user opens a web-based wallet or dApp that supports Trezor integration.
  2. The web app sends a request to the local Bridge service (running as a background process).
  3. Bridge forwards the request over USB/WebUSB to the Trezor device.
  4. The device displays transaction details locally; the user verifies and confirms on the device.
  5. After confirmation, the device signs the data and returns it back to the web app via Bridge.

This model ensures that signing decisions happen on the hardware device itself where the private key resides, not in the browser or host OS.

Security: Design Principles & Protections

Trézor Bridge® is built on several security principles designed to minimize attack surface and give end users control:

  • On-device confirmations: Every signing action requires physical confirmation on the Trezor device. The Bridge cannot approve transactions by itself.
  • Least privilege communications: Bridge only provides the specific APIs and data required for wallet interactions — no unrestricted OS-level access.
  • Open-source transparency: Critical components are open-source, allowing security researchers and the community to audit implementation.
  • Host isolation: The Bridge runs as a local service with a defined protocol, avoiding direct exposure of keys to the browser environment.

Note: Security also depends on your environment. Keep your OS and browser updated, verify downloads from official sources, and never share your recovery seed.

Installation & Quick Setup

Installation is straightforward. Below are high-level steps — always follow the instructions provided on the official Trezor site and verify signatures where applicable.

Steps

  • Download the Bridge installer for your operating system from the official source.
  • Run the installer and follow on-screen prompts; the Bridge typically installs as a background service.
  • Plug in your Trezor device and unlock it with your PIN.
  • Open a compatible web wallet or dApp and choose Trezor as your wallet provider. The app will detect Bridge and request a connection.

Common commands (for advanced users)

If you prefer the terminal, you can check whether the Bridge is running:

# macOS (example)