Trezor Bridge — Browser to Device Connector

Trezor Bridge is the secure intermediary that links browser-based wallets and desktop applications to your Trezor hardware wallet. It preserves a device-first security model while delivering reliable, cross-platform connectivity.

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Overview

What is Trezor Bridge?

Trezor Bridge is a small native application that runs on your computer and exposes a local authenticated endpoint. This local service allows browser-based wallets and desktop apps to communicate with Trezor hardware devices safely. Instead of relying on fragile browser-only APIs, Bridge centralizes transport logic, performs strict checks, and reduces the attack surface for web-based interactions.

Why it matters

Secure Communication Between Browser and Device

Modern browsers change APIs often and may impose security restrictions that make direct device communications unreliable. Trezor Bridge provides a stable compatibility layer that ensures wallet interfaces can talk to your hardware wallet without exposing private keys or bypassing user confirmations on the device screen.

  • Device-first security: All signing and sensitive confirmations happen on the physical Trezor device.
  • Cross-platform consistency: Works reliably across Windows, macOS, and Linux.
  • Reduced web risk: Browser pages never directly control the USB interface—Bridge mediates and authenticates requests.
How it works

Local API with Strong Device Verification

When installed, Bridge exposes a local HTTP API (commonly on `127.0.0.1` with a dedicated port). Only applications that follow origin and authorization flows can interact with the endpoint. Before any transaction is signed, the user must confirm details on the Trezor device itself — the bridge strictly relays messages and never authorizes actions automatically.

Isolation

Separates web content from the device layer to prevent direct access from untrusted pages.

Auto-reconnect

Graceful handling of temporary disconnects and reconnections.

Version safety

Bridge and client negotiate versions to avoid incompatibility or downgraded behavior.

Privacy-respecting telemetry

Telemetry (if enabled) is minimal and never contains private key or transaction content.

Install & Setup

Quick Installation Steps

Follow these steps to install and use Trezor Bridge safely:

  • Download Bridge from the official Trezor website only.
  • Run the platform-specific installer and accept system prompts.
  • Connect your Trezor device via a certified cable and unlock it with your PIN.
  • Open your preferred wallet interface (web or desktop) and follow pairing instructions.

If you encounter permission or driver prompts, consult the official support docs for platform-specific troubleshooting. Never install Bridge from third-party or unverified sources.

Security Best Practices

Keeping Your Setup Secure

Trezor Bridge is designed with security in mind, but user practices are equally important. Keep these guidelines in mind:

  • Verify downloaded installers with checksums when available.
  • Always confirm transaction data shown on the physical device.
  • Keep the device firmware and Bridge software up to date.
  • Store recovery seeds offline and never share them or enter them on a computer.
Disclaimer — Important:

Trezor Bridge is a connectivity tool that facilitates secure communication between your computer and Trezor hardware wallets. Cryptocurrency products and transactions carry risk and this information does not constitute financial advice. Always download software from official sources, keep secure backups of your recovery seed offline, and never disclose your seed, PIN, or passphrase to anyone. Use Trezor Bridge as part of a comprehensive security practice.