Trezor Bridge is a lightweight communication tool that allows your web browser to interact securely with your Trezor hardware wallet. It acts as a trusted connector between your device and online applications without exposing private keys or sensitive data.
In simple terms, Trezor Bridge makes sure that your computer and your Trezor device can understand each other safely.
Modern web browsers restrict direct access to USB devices for security reasons. Because of this limitation, browser-based wallet interfaces cannot communicate directly with hardware wallets on their own.
Trezor Bridge solves this problem by running as a background service on your system. It securely passes messages between your browser and the Trezor device while keeping all cryptographic operations inside the hardware wallet.
ℹ️ Important: All sensitive actions must still be confirmed directly on your Trezor device screen. Trezor Bridge only transfers messages, not authority.
Trezor Bridge is typically required when using older browser-based wallet interfaces or certain web tools that do not rely on the latest WebUSB technology.
If you are using the desktop version of Trezor Suite, Trezor Bridge is usually not required, as the desktop app communicates with the device directly.
Once installed, Trezor Bridge runs automatically in the background whenever your computer starts. When you connect your Trezor device and open a supported website, the browser sends a request to Trezor Bridge.
Trezor Bridge then forwards this request to your hardware wallet. Any response, such as a public address or signed transaction, is sent back through the same secure channel.
Trezor Bridge is designed with minimal permissions and a limited attack surface. It does not perform cryptographic calculations and cannot initiate actions on its own.
Even if your computer is compromised, attackers cannot move funds without physical confirmation on the Trezor device.
Restarting the browser or reconnecting the USB cable usually resolves this issue. In some cases, reinstalling Trezor Bridge helps refresh the connection.
Running more than one wallet interface at the same time may cause conflicts. Close unused applications before connecting your device.
Some systems require permission updates after installation. Ensuring your OS is up to date can prevent compatibility issues.
Trezor Bridge plays a quiet but essential role in hardware wallet usability. It enables secure browser communication while preserving the core principle of Trezor security—keeping private keys offline at all times.
Understanding how Trezor Bridge works helps users make informed decisions and maintain full control over their digital assets.