Trezor Bridge® — Connect Your Trezor to Web Browsers

Trezor Bridge® is a lightweight native application that creates a secure communication channel between your Trezor hardware wallet and web browsers (such as Chrome, Firefox, Edge). It acts as the trusted translator: when a website or web wallet needs to sign a transaction or read account info, Bridge ensures the request reaches your device safely, and that the response returns only after you confirm on the Trezor device.

Why Trezor Bridge matters

Trezor devices are designed to keep your private keys offline. Browsers alone cannot directly talk to a USB hardware device in a protected way across all platforms — that’s where Bridge comes in. It:

• Provides a secure, local-only connection between your browser and your Trezor.
• Makes web wallets and services able to detect and communicate with your device.
• Reduces friction: install once and multiple web apps can use your Trezor without extra drivers.

How it works (simple)

1. Install: You install Trezor Bridge on your computer (Windows, macOS, Linux).
2. Connect: Plug in your Trezor device over USB.
3. Authorize: A web app requests a signing operation — you confirm the action on the device screen.
4. Complete: The signed transaction is returned to the web app; your private keys never leave the device.

Getting started — installation & tips

Installation is intentionally easy. Download the Bridge installer for your operating system from the official Trezor sources and follow the guided steps. After installation:

• Open your browser and visit the web wallet or service you trust.
• When prompted, connect your Trezor via USB and follow the on-screen confirmation on the device.
• If a website cannot detect your device, ensure Bridge is running and your browser hasn’t blocked the connection.

Tip: Always download Bridge only from official Trezor channels to avoid tampered installers.

Security model

Trezor Bridge is intentionally minimalist — it never stores your private keys, passphrases, or seeds. The cryptographic operations take place on the hardware device. Bridge simply forwards safe, clearly-scoped requests from the browser to the device and returns signed responses only after you confirm actions physically on the Trezor.

Common troubleshooting

• Device not found: Reconnect the USB cable, try a different port, and restart Bridge.
• Browser blocked connection: Allow the connection in browser prompts or check for extensions that block WebUSB/Trezor access.
• Installer issues: Check OS permissions — macOS and some Linux distros may require explicit permissions for native apps.

Advanced use cases

Power users and developers use Trezor Bridge to integrate Trezor support into web applications, self-hosted wallets, and developer tooling. Bridge exposes a compact interface for signing and public-key retrieval operations while leaving the heavy lifting of crypto inside the secure hardware.

Privacy & best practices

• Only connect your Trezor to websites you trust; review transaction details on the device before confirming.
• Keep Bridge and your Trezor firmware up to date to receive security and compatibility updates.
• Use a strong, unique passphrase (if you enable it) and store your recovery seed offline in a secure location.

Developer notes

If you’re building a web wallet or experimenting with hardware wallet integrations, Trezor Bridge offers a straightforward API to discover devices and request cryptographic operations. Developers should still follow secure coding best practices and never assume the browser or network layer is secure.

Whether you’re a casual user or a developer, Trezor Bridge is the secure bridge between your browser and hardware — designed to keep private keys offline while enabling convenient web-based interactions.