Trezor Bridge

What is Trezor Bridge?

Trezor Bridge is the official companion service that facilitates secure communication between your Trezor hardware wallet and apps running in your browser or on your desktop. Where direct USB access or WebUSB isn't feasible or consistent across operating systems and browsers, Trezor Bridge offers a stable, user-friendly channel that preserves the essential security model: private keys never leave the device, and all signing happens on-device.

Cross-platform

Works on Windows, macOS and Linux to unify device connectivity.

Trusted

Official releases are signed and verified; only download from trusted sources.

Lightweight

Small footprint, fast install, low system requirements.

Why Trezor Bridge matters

Hardware wallets provide the strongest practical protection for crypto assets, but the user experience depends on reliable connectivity. Trezor Bridge ensures that wallets, browser-based apps, and desktop clients can communicate consistently while keeping hardware confirmation and signing on-device. This separation of concerns is what makes secure self-custody easy to use without weakening protections.

Core capabilities

Session management and secure channel establishment
Device discovery and multi-device handling
Attestation and firmware checks
Fallbacks for environments that lack native WebUSB

Official resources and documentation are available on the Trezor websites and repositories — see the links in the sidebar for downloads, developer docs, and support.

Installation & download

To use Trezor Bridge, download it from the official source and follow the platform-specific installer. Windows users will find an installer; macOS offers a signed package; Linux users can use AppImage or distribution packages. As always, verify signatures where provided and avoid third-party mirrors to reduce risk.

Downloads and support: Trezor Suite & Downloads • Support Centre

How it works (high level)

Trezor Bridge runs a small local service that listens for connection requests from web pages or desktop apps. When a connection is requested, Bridge negotiates a session and forwards messages to the attached Trezor device. The device then displays transaction or permission details for the user to confirm. Only signed responses are sent back — private keys never leave the hardware.

Security model

Trust relies on device-level confirmations and cryptographic signatures. Bridge itself is a transport; it is not an authority on account state or transaction validity. Users must always verify addresses and amounts on the device screen to avoid phishing and malware attacks.

Developer API

Developers can call into Bridge APIs to enumerate devices, open sessions, and request actions. The API is intentionally minimal: it transports requests and responses while leaving policy decisions and UX design to the integrating app. For developer resources, check the Trezor GitHub and SDK docs.

Developer links: Trezor on GitHub • trezor-suite repo

Troubleshooting & common issues

Connectivity hiccups are usually solved by updating Bridge, checking system USB permissions, and ensuring no other software is holding the device open. On browsers, allow WebUSB access where appropriate or use the Bridge fallback when native browser support is limited.

Checklist

Download Bridge from the official source.
Restart your browser or system after installation if connectivity fails.
Use the latest firmware on your Trezor device.
Confirm addresses on the hardware device.

Support and more: support.trezor.io • Community Forums