Trezor Bridge

What is Trezor Bridge?

Trezor Bridge is a secure intermediate tool that enables communication between your Trezor hardware wallet and web applications. It runs locally on your computer and handles USB or HID connections securely, so web wallets and dApps can talk to your device safely.

Without Bridge, many browsers can’t directly communicate with USB devices, making it essential for using Trezor via web interfaces.

Why Use Bridge?

• Enables web-to-device communication in browsers without native USB support.
• Supports major platforms: Windows, macOS, Linux.
• Runs behind the scenes; you don’t have to interact with it manually.
• Ensures encrypted, private communication with your device.
• Maintains compatibility across updates in browser and OS changes.

How it Works Under the Hood

When a web application wants to interact with your Trezor, Bridge listens on a local port. Web apps send requests (like signing a transaction), and Bridge forwards them securely to your device. Reverse communication (device responses) also flows through Bridge, isolating the device from direct browser exposure.

All sensitive operations — entering PIN, confirming actions — happen physically on the Trezor device, so even if your browser is compromised, your keys remain safe.

Install & Setup Bridge

• Choose and download the version for your operating system.
• Run the installer and follow instructions to complete setup.
• Connect your Trezor device via USB.
• Open your browser and navigate to the Trezor web interface.
• Bridge will be detected automatically and activate the connection.

If the browser supports WebUSB or WebHID (e.g. recent Chrome builds), Bridge may not be required. But it remains essential for compatibility in many setups.

Troubleshooting & Best Practices

• Always download Bridge from trusted, official source.
• Keep Bridge and Trezor firmware up to date.
• Restart bridge service or browser if your device isn’t detected.
• Check USB cable, port, or try another one if connection fails.
• Disable browser extensions or ad blockers that may block device communication.