Trezor® Bridge

Trezor Bridge — Secure Communication Between Your Device & Browser

Trezor Bridge is a lightweight software component that enables seamless and secure communication between your Trezor hardware wallet and supported web browsers. It acts as a secure transport layer, ensuring that commands, transaction data, and confirmations pass safely between your device and Trezor Suite or compatible applications.

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What is Trezor Bridge?

Trezor Bridge is an essential background application designed to connect your Trezor hardware wallet to your computer’s browser. Unlike browser extensions, Trezor Bridge runs as a local service on your operating system, creating a secure and reliable communication channel.

When you use Trezor Suite Web or supported third-party wallets, the browser needs a secure method to communicate with your physical device. Trezor Bridge provides that secure pathway without exposing private keys or sensitive data to the internet.

How Trezor Bridge Works

1. Device Detection

Once installed, Trezor Bridge automatically detects when your Trezor device is connected via USB. It initializes a secure handshake process between the device and your browser.

2. Secure Data Channel

The software establishes encrypted communication between your hardware wallet and the web interface. No private keys leave the device at any point.

3. Transaction Relay

When initiating a transaction, the browser sends unsigned transaction data through Trezor Bridge to the device for verification and signing.

4. On-Device Confirmation

The user confirms the transaction directly on the Trezor screen, preventing malware or phishing attacks from modifying transaction details.

Key Benefits of Trezor Bridge

Improved Browser Compatibility: Trezor Bridge eliminates dependency on outdated browser plugins by using a modern background service.
Enhanced Security: Communication is encrypted locally, reducing exposure to browser-based threats.
Automatic Updates: Bridge receives updates to maintain compatibility and patch vulnerabilities.
Lightweight & Efficient: Minimal system resource usage ensures smooth operation in the background.

Technical Overview

Trezor Bridge operates as a local HTTP server running on your computer. When you access Trezor Suite Web, the web interface communicates with the local Bridge instance via localhost. This ensures that device commands never pass directly through remote servers.

The communication protocol uses secure APIs and device-level encryption standards implemented within Trezor firmware. This layered approach ensures that even if your computer is compromised, attackers cannot extract private keys from the hardware wallet.

Trezor Bridge supports Windows, macOS, and Linux operating systems. Installation packages are digitally signed to prevent tampering.

Frequently Asked Questions

Is Trezor Bridge required for Trezor Suite?
Trezor Bridge is required when using Trezor Suite Web. The desktop version of Trezor Suite does not require Bridge.
Does Trezor Bridge store private keys?
No. Private keys remain securely stored inside your Trezor hardware wallet at all times.
Can I uninstall Trezor Bridge?
Yes. If you switch to Trezor Suite Desktop, Bridge is no longer necessary and can be removed.
Is Trezor Bridge safe?
Yes. It is an official component developed by Trezor and digitally signed for integrity verification.

Trezor Bridge — Secure Device Communication Layer | Trezor®