Trezor Bridge is a essential communication tool that enables secure interaction between your web browser and Trezor® hardware wallet devices. This background service acts as a translator, converting USB signals from your Trezor® device into a format that web applications can understand and process securely.
Unlike the desktop Trezor Suite application which has built-in device communication, web-based interfaces require Trezor Bridge to facilitate the Trezor Bridge login process and enable transaction signing through browser applications.
Enables web applications to communicate with your Trezor® device through a local HTTP server running on your computer.
Converts USB HID protocol to web-compatible JSON-RPC, maintaining security throughout the translation process.
Available for Windows, macOS, and Linux systems, ensuring consistent functionality across all major operating systems.
Includes automatic update functionality to ensure you always have the latest security patches and compatibility improvements.
Trezor Bridge is typically installed automatically when you download Trezor Suite. For manual installation, download it separately from the official Trezor® website.
Run the installer and follow the on-screen instructions. The service installs as a background process that starts automatically with your system.
After installation, restart your browser and visit a Trezor®-compatible web application. The Trezor Bridge login process should now work seamlessly.
If connection issues persist, ensure the Bridge service is running in your system tray and try restarting both the service and your web browser.
| Scenario | Bridge Required? | Alternative |
|---|---|---|
| Desktop Trezor Suite | No | Built-in communication |
| Web Wallet Interface | Yes | Desktop Suite recommended |
| Third-party Web Services | Yes | Desktop Suite if available |
| Mobile trezor suite app | No | Native mobile communication |
Trezor Bridge operates as a localhost service (typically on port 21325) that creates a secure communication channel between web applications and your Trezor® device. It uses WebUSB and U2F protocols to maintain the highest security standards while enabling browser-based interactions.
The service runs continuously in the background but consumes minimal system resources. It automatically detects when your Trezor® device is connected and prepares it for web-based Trezor login and transaction signing operations.
If Trezor Bridge login fails, check that: Bridge is running in system tray, your browser is restarted after installation, no firewall is blocking localhost connections, and you're using a supported browser (Chrome, Firefox, Edge).
For persistent issues, try reinstalling Trezor Bridge or switching to the desktop Trezor Suite application which doesn't require Bridge for device communication.
Trezor Bridge is a communication tool for web browsers, while Trezor Suite is the full-featured desktop application for managing your Trezor Wallet. Suite includes Bridge's functionality built-in.
No, the desktop Trezor Suite application has built-in device communication and doesn't require Trezor Bridge. Bridge is only needed for web browser access.
No, Trezor Bridge login refers to the standard Trezor login process facilitated by Bridge for web applications. The security and steps remain identical to desktop login.
No, the trezor suite app for mobile uses native communication protocols (Bluetooth/USB) and doesn't require or support Trezor Bridge.
On Windows, check the system tray for the Bridge icon. On macOS, look in the menu bar. On Linux, check if the process is running in your system monitor.
Yes, Trezor Bridge is signed by SatoshiLabs and only facilitates communication - it cannot access your private keys or recovery seed, which remain secure in your hardware device.