Trezor Bridge — Secure Desktop Connector

Why a connector matters

When you hold cryptocurrency with a hardware wallet, your private keys live offline—intentionally unreachable by the web. To use that wallet with modern desktop apps and web interfaces you still need a small, secure bridge: a deliberate, minimal program that strictly mediates messages between your device and the applications you trust.

Trezor Bridge was built to be exactly that: a narrow, focused component whose job is to create a trusted channel for device management, signature requests, and firmware checks while avoiding broad system access. For users who prefer explicit desktop tooling over browser-only flows, a well-crafted bridge reduces friction and keeps interactions readable, auditable, and reversible.

Security-first design

A bridge operates with the smallest possible privileges. It doesn't store keys, it doesn't make policy decisions for you, and it only exposes the specific APIs required to perform device enumeration, firmware verification, and cryptographic signing. That narrow scope is an advantage: fewer moving parts, fewer attack surfaces, and clearer expectations for audits.

Compatibility & user experience

Because desktop environments are fragmented—Windows, macOS, and many Linux distros—having a small native component lets the Trezor team provide a consistent UX across browsers and operating systems while keeping the web layer light. The bridge can speak the native USB and HID protocols which browsers cannot access directly, enabling rich interactions without sacrificing safety.