Trezor Bridge
Trezor Bridge is the essential secure communication layer that enables your Trezor hardware wallet to interact safely with web browsers and cryptocurrency applications. This lightweight background service ensures encrypted communication between your Trezor device and browser-based interfaces like Trezor Suite Web, allowing you to manage your cryptocurrency assets with maximum security.
What is Trezor Bridge?
Trezor Bridge functions as a secure bridge between the Trezor hardware wallet and your computer's web browser. Unlike browser extensions that could be vulnerable to attacks, Trezor Bridge runs as a separate background service on your operating system, providing an additional layer of security. When you connect your Trezor device to manage cryptocurrencies through web interfaces like Trezor Suite Web or third-party wallet interfaces, Trezor Bridge ensures all communication is encrypted and verified.
This essential software component translates USB protocol messages from your Trezor hardware wallet into a format that web browsers can understand through a local HTTP server. The Bridge runs on localhost (127.0.0.1) and only accepts connections from your browser, preventing external access to your device. Without Trezor Bridge installed, your browser cannot communicate with your Trezor hardware wallet, making it impossible to access your cryptocurrency assets through web interfaces.
Enhanced Security Layer
Trezor Bridge creates an isolated communication channel that prevents browser-based attacks from reaching your hardware wallet. All data is encrypted end-to-end between your Trezor device and the browser application.
Seamless Connectivity
Once installed, Trezor Bridge works silently in the background, automatically detecting when you connect your Trezor hardware wallet and establishing secure communication with supported web applications.
Lightweight & Efficient
The Bridge software uses minimal system resources and runs as a background service that starts automatically with your operating system, ensuring your Trezor hardware wallet is always ready to connect.
Automatic Updates
Trezor Bridge automatically checks for and installs security updates and compatibility improvements, ensuring your connection remains secure against emerging threats.
Open Source Code
Like all Trezor software, Bridge is open source, allowing security researchers to audit the code and verify there are no backdoors or vulnerabilities in the communication layer.
Multi-Browser Support
Trezor Bridge works with all major browsers including Chrome, Firefox, Edge, and Brave, providing consistent secure connectivity regardless of your browser preference.
Download Trezor Bridge
Trezor Bridge is available for all major operating systems. Select your platform below to download the appropriate installer. The Bridge software is required if you want to use Trezor Suite Web version or connect your Trezor hardware wallet to any browser-based cryptocurrency application.
Setup & Installation Guide
Installation Steps:
- Download the installer for your operating system from the links above
- Run the installer and follow the on-screen instructions (administrator privileges may be required)
- Restart your browser after installation completes to ensure it detects Trezor Bridge
- Connect your Trezor hardware wallet via USB cable to your computer
- Open Trezor Suite Web or another supported web application
- Grant permission when prompted to allow the website to communicate with your Trezor Bridge
- Verify connection by checking if your Trezor device is detected in the web interface
Verifying Installation:
To verify Trezor Bridge is running correctly on your system:
- Windows: Check for "Trezor Bridge" in the system tray (bottom-right corner)
- macOS: Look for Trezor Bridge in the menu bar (top-right) or in Activity Monitor
- Linux: Check if the service is running with:
systemctl status trezor-bridge - Visit http://127.0.0.1:21325/ in your browser - you should see a Trezor Bridge status page
Important Security Notes
- Only download Trezor Bridge from official sources (links on this page or trezor.io)
- Never disable your firewall or antivirus to install Trezor Bridge - if blocked, add an exception instead
- Keep Trezor Bridge updated to the latest version for security patches
- If you use the Trezor Suite desktop application, Bridge is included and runs automatically
- For maximum security, use the Trezor Suite desktop app instead of web version when possible
Trezor Bridge Resources
Troubleshooting Common Issues
Trezor Bridge Not Detected
- Restart Trezor Bridge: Close the application completely and restart it from your applications menu
- Check firewall settings: Ensure your firewall isn't blocking Trezor Bridge (port 21325)
- Update browser: Make sure you're using the latest version of your web browser
- Try different USB port/cable: Some USB ports may not provide sufficient power or data connection
- Reinstall Trezor Bridge: Uninstall completely, restart your computer, then install the latest version
Connection Error Messages
"Bridge not detected": Usually means Trezor Bridge isn't running. Start the application or reinstall it.
"Device not found": Your Trezor hardware wallet isn't connected or isn't unlocked. Connect your device and enter your PIN.
"Outdated firmware": Update your Trezor device firmware through Trezor Suite desktop application.
Trezor Bridge FAQ
Trezor Bridge creates a secure communication channel between your Trezor hardware wallet and web browsers. It translates USB protocol messages from your Trezor device into a format that web applications can understand through a local HTTP server. You need Trezor Bridge to use web-based interfaces like Trezor Suite Web with your hardware wallet, as browsers cannot directly communicate with USB devices for security reasons.
Yes, the Trezor Suite desktop application includes Trezor Bridge functionality built-in. If you use Trezor Suite desktop app, you don't need to install Bridge separately. However, if you want to use the web version of Trezor Suite or connect to other browser-based cryptocurrency applications, you'll need to install Trezor Bridge as a separate component.
Yes, Trezor Bridge is compatible with all Trezor hardware wallet models including Trezor One, Trezor Model T, and any future Trezor devices. The Bridge software communicates using a standardized protocol that works across the entire Trezor product line, ensuring consistent secure connectivity regardless of which Trezor hardware wallet you own.
Trezor Bridge is completely safe and does not have access to your private keys. Like all Trezor software, Bridge is open-source and has been audited by security researchers. The Bridge only facilitates communication between your browser and hardware wallet - your private keys remain securely stored on your Trezor device and never leave the hardware wallet. Bridge cannot sign transactions or access your cryptocurrency funds.
Yes, Trezor Bridge can communicate with multiple browsers at the same time. Once installed and running, any supported browser on your computer can connect to your Trezor hardware wallet through Bridge. However, only one application can actively communicate with your Trezor device at any given moment to prevent conflicting transaction requests.
No, Trezor Bridge only needs to be running when you want to use your Trezor hardware wallet with a web browser. The Bridge service starts automatically when you boot your computer (by default), but you can close it when not in use. When Bridge isn't running, browser-based applications won't be able to detect or communicate with your Trezor device.
Trezor Bridge uses port 21325 for HTTP communication by default. This port was chosen specifically for Trezor Bridge to avoid conflicts with other applications. Advanced users can change the port through configuration files, but this is generally not recommended as it may break compatibility with web applications expecting the default port.
Trezor Bridge automatically checks for updates and will prompt you when a new version is available. You can also manually check for updates within the Bridge application settings. For complete updates, it's recommended to download the latest installer from the official Trezor website and reinstall, which ensures all components are properly updated.
Yes, Trezor Bridge works on most Linux distributions including Ubuntu, Debian, Fedora, Arch Linux, and their derivatives. The Bridge software has few dependencies and is compatible with most modern Linux systems. For distribution-specific installation instructions, check the official Trezor Bridge documentation on the Trezor Wiki.
Yes, Trezor Bridge enables your Trezor hardware wallet to work with compatible third-party web interfaces including MetaMask (via the Trezor Connect integration), MyEtherWallet, MyCrypto, and other browser-based cryptocurrency applications. As long as the web application supports Trezor hardware wallet connectivity, Trezor Bridge will facilitate the secure connection.