Trezor Bridge

A secure, lightweight bridge that connects your Trezor hardware wallet to desktop and web applications.

Official software

Connect your Trezor device to apps safely

Trezor Bridge runs on your desktop and provides a secure channel between supported websites and your hardware wallet. It is designed to be minimal, secure, and easy to install — enabling you to manage keys, sign transactions, and interact with web-based wallets without exposing your private keys.

Secure communication
Encrypted local transport and strict origin checks protect device communications.
Seamless integration
Works with web wallets and desktop apps that support the Trezor API.
Cross-platform
Available for major desktop platforms: Windows, macOS, and Linux.
Lightweight
Small footprint with automatic updates to keep security up-to-date.
Download Bridge How it works

How Trezor Bridge works

Trezor Bridge is a small local service that runs on your computer and acts as a bridge between the hardware wallet (connected via USB) and the browser or desktop applications that need to talk to it. When a website requests access, Bridge validates the request origin and forwards only the allowed messages to the device. All sensitive operations—like signing transactions or revealing public keys—require physical confirmation on the Trezor device itself.

Key principles

  • Local-only communication: Bridge listens on a local port on your machine and never transmits private keys to the internet.
  • Origin enforcement: Web apps must present a valid origin and user approval flows are enforced.
  • User confirmation: Critical actions require physical confirmation on the device.

Install guide (quick)

1
Download
Click the Download Bridge button above and choose the installer for your operating system.
2
Run installer
Open the downloaded installer and follow the on-screen instructions. Administrator rights may be required on some systems.
3
Connect your Trezor
Plug the Trezor into a USB port and unlock it. Your browser or desktop app should now detect the device via Bridge.

Example usage

// This snippet shows the conceptual flow — real integrations use the official API // 1) App asks for device list // 2) Bridge enumerates connected devices // 3) App sends sign request -> user confirms on device

Security notes

Bridge itself is a transport layer — the hardware wallet remains the root of trust. Private keys are generated and stored only on the device. Always download Bridge from an official or trusted source, verify installer signatures when available, and keep both your device firmware and Bridge up to date to benefit from security fixes.

Troubleshooting

Device not detected? Try a different USB cable or port. Ensure Bridge is running (check your system tray / menu bar). Some browsers may need to be restarted after installation.

Permission issues on Linux? You may need udev rules or to run the installer with elevated privileges. Consult platform-specific docs for precise steps.

Still stuck? Check logs produced by Bridge for diagnostic messages or consult community support channels for help.

Frequently asked questions

Is Bridge safe? Yes — Bridge is designed to only provide local communication between your device and apps. Critical actions still require device confirmation.

Do I need Bridge to use my Trezor? Most modern integrations use either a WebUSB/WebHID path or Bridge depending on platform and browser. Bridge ensures compatibility where direct browser support is limited.

Can Bridge auto-update? Many installers include an auto-update mechanism; you can also manually update by downloading the latest installer.