Trezor Bridge is a lightweight software developed by SatoshiLabs, designed to create a secure communication channel between your Trezor hardware wallet and supported applications on your computer, such as Trezor Suite. It plays a vital role in enabling your browser or desktop environment to interact safely with your Trezor device.
Unlike traditional browser-based wallet extensions or WebUSB connections, Trezor Bridge operates in the background and ensures compatibility across different platforms — including Windows, macOS, and Linux — without relying on external browser plugins.
Trezor Bridge acts as the middle layer between your Trezor device and your computer. When you plug in your Trezor via USB, the Bridge detects the device and facilitates secure interaction with the Trezor Suite or other Trezor-compatible applications.
This connection ensures:
Trezor Bridge does not access or store any sensitive data. Your private keys remain stored safely within the hardware wallet, and all critical actions must still be approved manually on the device itself.
Many browsers have deprecated the use of plugins and limited support for direct USB communication. Trezor Bridge eliminates these compatibility issues, enabling your wallet to function properly across browsers and operating systems without relying on unstable or limited browser features like WebUSB.
All communication between your device and the interface is encrypted and authorized. Trezor Bridge ensures that only trusted applications (such as Trezor Suite) can communicate with your device. Any attempt to access the device from unverified sources is blocked, reducing the risk of phishing or malware attacks.
Once installed, Trezor Bridge runs silently in the background. It launches automatically when your system starts and requires no complex configuration or constant updates by the user. It also auto-updates to ensure optimal performance and security.
While WebUSB is still available in certain browsers like Chrome, it is limited, often unstable, and disabled by default in some privacy-focused browsers. Trezor Bridge provides a more reliable, secure, and future-proof alternative. It ensures that users can access their wallets regardless of browser changes or WebUSB support.
Trezor Bridge is a critical part of the Trezor ecosystem, providing the backbone for safe and seamless communication between your hardware wallet and desktop environment. It ensures your wallet functions smoothly, your data stays secure, and your experience remains frictionless — without compromising the core values of privacy and self-custody.