Made with GrigoraSECURE USB PROTOCOL DAEMON
Trezor Bridge is the dedicated standalone communication driver designed to seamlessly link your physical Trezor hardware wallet with web-based browsers and local interfaces. Operating quietly in your computer's background, it acts as a hardened cryptographic conduit, ensuring private keys never touch exposed network sockets or untrusted third-party services.
Runs as a lightweight localhost service exclusively listening on port 21325. It guarantees zero data transmission outside your physical operating machine, maintaining strict cryptographic isolation between hardware memory and browser sandbox states.
Replaces obsolete browser extensions and WebUSB limitations. It bridges Chrome, Firefox, Brave, Safari, and Edge to communicate uniformly with Trezor Model One, Model T, and Trezor Safe 3 without third-party plugins.
Native binary support for Windows 10/11, macOS (Intel & Apple Silicon M-Series), and modern Linux distributions (Debian, Ubuntu, Fedora). Pre-configured udev rules ensure immediate device identification.
When interacting with decentralized finance protocols, Web3 dApps, or managing your digital portfolio via Trezor Suite for Web, your internet browser lacks direct low-level permissions to communicate over raw USB interfaces. Trezor Bridge resolves this constraint securely. Written in Go, Trezor Bridge registers an internal daemon process that handles protocol-level serial communication through an HTTP JSON API restricted to local requests. Because the bridge does not possess encryption keys, seed phrases, or pin configurations, it operates strictly as a pipe—translating messages between human-readable browser interfaces and serialized cryptographic binary packets on your hardware wallet.
STEP 01
Download the verified official installation binary matching your operating architecture (Windows .exe, macOS .pkg, or Linux .deb/.rpm package).
STEP 02
Run the installer. Administrative privileges allow the daemon to automatically initialize as a persistent background service with reboot persistence.
STEP 03
Plug your Trezor device into a high-speed USB port. Open your browser to initialize pairing; Trezor Bridge automatically detects device handshakes.
Security Assurance: Trezor Bridge never interrogates private key materials. All transaction signing, seed derivation, and address validations take place solely within the secure hardware enclave of your Trezor physical device. If a malicious web script attempts unauthorized operations, Trezor Bridge transmits the prompt directly to your physical display, where physical confirmation remains mandatory before any cryptographic action is computed.
No. The standalone Trezor Suite desktop application has built-in communication drivers bundled directly inside the software. Trezor Bridge is specifically required when using Trezor Suite for Web via internet browsers or interacting with third-party web interfaces such as MetaMask, Uniswap, and OpenSea that require device access without the standalone desktop program running.
You can verify the status of Trezor Bridge by navigating to http://127.0.0.1:21325/status/ in any web browser. When functioning properly, the diagnostic page displays the version string along with active USB handshake status. Additionally, inspect your operating system's activity monitor (Task Manager on Windows or Activity Monitor on macOS) for the process named 'trezord'.
No. The architecture adheres to open-source cryptographic principles. Trezor Bridge enforces Cross-Origin Resource Sharing (CORS) security guidelines and acts purely as an unprivileged transport layer. Since secret keys never exit the secure microcontroller unit inside the physical Trezor device, no software layer on your host computer possesses the keys to compromise.