Trezor Bridge — The Secure Gateway to Your Hardware Wallet®

A concise presentation describing what Trezor Bridge does, why it matters, and how to deploy it securely for everyday crypto custody.

Introduction

What is Trezor Bridge?

Trezor Bridge is a lightweight local application that securely mediates communications between a web browser or desktop app and your Trezor hardware wallet. It replaces legacy browser plugins and provides a robust, cross-platform transport layer so users can sign transactions, manage accounts, and update firmware with minimal friction.

Why it matters

Security-first design

Bridge isolates USB/hardware access to a trusted local service — reducing attack surface exposed to web pages.

Cross-platform compatibility

Works across Windows, macOS and Linux and integrates with Trezor Suite and popular browser wallets.

Seamless UX

Auto-detection and simple installs make first-time setup approachable for non-technical users.

How Trezor Bridge works

Local service + browser handshake

Trezor Bridge runs on the user’s machine and listens on a localhost port. When a web app wants to use a Trezor device, it sends a request that Bridge safely forwards to the device over USB or WebUSB. The hardware wallet continues to enforce its own secure UI — PIN entry and confirmation happen on the device itself.

Security model

Bridge intentionally minimizes privileges: it does not store keys or passphrases, it only routes messages. All sensitive operations are confirmed on the Trezor device, preserving strong physical security guarantees.

Common use cases

Account management

View addresses and balances in Trezor Suite or supported wallets.

Transaction signing

Sign transfers, contract interactions, and multisig approvals with on-device verification.

Firmware updates

Bridge assists safe firmware installs while preserving user confirmations on the device.

Best practices & recommendations

Install only from official sources

Always download Trezor Bridge from trusted and verifiable official pages. Verify checksums when provided and avoid third-party mirrors.

Keep software up to date

Regularly update Bridge and Trezor firmware. Updates include security fixes and interoperability improvements.

Least privilege and isolation

Run Bridge on a trusted machine, avoid installing unnecessary browser extensions, and follow operating system security hygiene (automatic updates, antivirus where appropriate, disk encryption).