Short summary: Trezör® Bridge® is a lightweight communication layer designed to securely link your Trezör hardware wallet to web apps and wallets. This document describes purpose, benefits, security model, setup flows, integrations, and best practices for users and integrators.
Trezör Bridge acts as a secure local intermediary between a Trezör hardware wallet and a browser or desktop app. It provides an encrypted, controlled connection that lets websites request public keys, show addresses, and request signatures — while private keys remain on the device.
Browsers impose strict USB / WebUSB / security boundaries. A local bridge provides a stable, auditable channel and a consistent UX across browsers and operating systems.
Trezör Bridge is intentionally narrow in scope: it only carries authenticated requests between an originating web app and the device. All signing confirmations are performed physically on-device so secrets never leave the hardware.
Bridge smooths over browser differences, allowing third-party dApps and wallets to integrate without custom USB code for every platform. This reduces user friction during onboarding and transaction signing.
Developers can use the Trezör Connect API and SDKs to call the bridge and receive standard popups and responses; integration examples and official SDKs are publicly available.
All sensitive operations require user confirmation directly on the hardware: PIN entry, passphrase, and transaction confirmation. This creates a trust boundary that prevents remote compromise from authorizing transactions silently.
Only install Bridge from official sources and keep your OS and browser up to date. Avoid installing Bridge executables from unverified pages — use the official Trezör domains or GitHub releases for code that you audit.
When a website shows a popup from the connect.trezor.io origin you should verify the page origin in the browser and confirm on-device details before signing.
Use the official Trezör Connect JavaScript SDK to open a secure popup, request addresses, and request signatures. The Connect project and examples are open source and include an explorer for testing.
It depends on environment and browser capabilities — some modern setups use WebUSB directly or Trezör Suite web app. Follow official guidance for your OS/browser combo.
Only download from the trezor.io domain or the official Trezor GitHub organization. Check cryptographic signatures on releases when provided.
Trezör Bridge is a narrowly-scoped connectivity layer designed to preserve the hardware wallet's security guarantees while enabling modern Web3 UX. For users: always verify sources and confirm actions on-device. For developers: rely on official SDKs and follow the principle of least privilege.