What is Trezor Bridge?
Trezor Bridge is a lightweight background application that enables secure communication between your Trezor hardware wallet and web browsers. It acts as a translator that allows web applications like Trezor Suite Web and third-party wallet interfaces to interact with your Trezor device safely.
Why You Need Trezor Bridge
Web browsers have security restrictions that prevent direct USB communication with hardware devices. Trezor Bridge solves this by creating a secure local connection that maintains the isolation between your private keys (on the Trezor) and potentially compromised web environments.
Key Benefits of Trezor Bridge
Enhanced Security
Bridge maintains the security model of hardware wallets by ensuring private keys never leave your Trezor device, even when interacting with web applications.
Browser Compatibility
Works with all major browsers including Chrome, Firefox, Edge, and Brave without requiring additional extensions or permissions.
Automatic Updates
Bridge automatically updates itself to ensure you always have the latest security patches and compatibility improvements.
Background Operation
Runs silently in the background and only activates when you connect your Trezor device, consuming minimal system resources.
Download Trezor Bridge
Choose your operating system below for specific download instructions. Trezor Bridge is required for using Trezor Suite Web and other web-based wallet interfaces.
Windows Download
Windows 64-bit
Recommended for most users
Compatible with Windows 10, 11, and Server 2016+
Download 64-bitWindows 32-bit
Legacy systems only
For older Windows versions (7, 8, 32-bit systems)
Download 32-bit1 Download Installer
Visit suite.trezor.io/web/bridge/ and download the Windows installer. The file will be named `trezor-bridge-2.0.31-win.exe`.
2 Run as Administrator
Right-click the installer and select "Run as administrator" to ensure proper installation of system services.
3 Follow Installation Wizard
The installer will guide you through the process. No configuration is needed - just click "Next" through the prompts.
4 Restart Browser
After installation, completely close and reopen your web browser for the changes to take effect.
macOS Download
1 Download Package
Visit suite.trezor.io/web/bridge/ and download the macOS package. The file will be named `trezor-bridge-2.0.31.pkg`.
2 Open Installer
Double-click the downloaded PKG file. macOS may show a security warning - this is normal for applications from identified developers.
3 Install System Extension
During installation, you'll be prompted to allow a system extension. Go to System Preferences > Security & Privacy and click "Allow".
4 Complete Installation
Follow the installation prompts. The Bridge service will automatically start running in the background.
macOS Note: Trezor Bridge requires macOS 10.11 or later. On newer macOS versions, you may need to grant additional permissions in System Preferences for the Bridge to function properly.
Linux Download
1 Choose Your Distribution
Visit suite.trezor.io/web/bridge/ and select your package format: DEB (Ubuntu/Debian) or RPM (Fedora/CentOS).
2 Install via Package Manager
Ubuntu/Debian: sudo dpkg -i trezor-bridge_2.0.31_amd64.deb
Fedora/CentOS: sudo rpm -i trezor-bridge-2.0.31-1.x86_64.rpm
3 Start Bridge Service
Systemd systems: sudo systemctl start trezor-bridge
Enable auto-start: sudo systemctl enable trezor-bridge
4 Configure USB Permissions
Add your user to the plugdev group: sudo usermod -a -G plugdev $USER
Log out and back in for changes to apply.
Alternative Method: Trezor Bridge is also available in many distribution repositories. Check your package manager for availability.
Installation & Setup
Post-Installation Verification
1 Check Bridge Status
After installation, verify Bridge is running by visiting http://127.0.0.1:21325 in your browser. You should see a "Trezor Bridge running" message.
2 Connect Your Trezor
Connect your Trezor device via USB cable. The device should be detected automatically without requiring browser extensions.
3 Test Connection
Visit suite.trezor.io and check if your Trezor is recognized. You should be able to interact with your device through the web interface.
4 Browser Compatibility Check
Ensure your browser can communicate with Bridge. Supported browsers include:
Automatic Detection: Modern browsers automatically detect Trezor Bridge. No manual configuration or extension installation is required for most use cases.
Troubleshooting Common Issues
Bridge Not Detected
Symptoms: Browser shows "Bridge not detected" error
Solutions:
- Restart Trezor Bridge service
- Reinstall Bridge completely
- Check firewall settings
- Try different USB port
Device Not Recognized
Symptoms: Trezor connected but not detected
Solutions:
- Try different USB cable
- Restart computer
- Update USB drivers
- Check device manager
Connection Timeouts
Symptoms: Operations timing out or failing
Solutions:
- Disable VPN/proxy temporarily
- Check internet connection
- Clear browser cache
- Update browser
Permission Errors
Symptoms: Access denied errors on Linux/macOS
Solutions:
- Check user group membership
- Verify USB permissions
- Reinstall with admin rights
- Check system extensions
Service Management
Bridge Service Status
Check if Trezor Bridge is running properly:
- Windows: Check Services.msc for "Trezor Bridge"
- macOS: Look for "Trezor Bridge" in Activity Monitor
- Linux: Run
systemctl status trezor-bridge
Advanced Troubleshooting: If issues persist, check the Bridge logs located in system-specific directories. On Windows: %AppData%\Trezor Bridge\logs, on macOS: ~/Library/Logs/Trezor Bridge/, on Linux: /var/log/trezor-bridge/
Security Considerations
Local Communication Only
Trezor Bridge only communicates locally between your browser and Trezor device. It doesn't send any data to external servers and doesn't require internet access to function.
No Private Key Exposure
Bridge follows the same security principles as the Trezor device itself - private keys never leave the hardware wallet. Bridge only facilitates communication, not key handling.
Automatic Security Updates
Bridge includes an automatic update mechanism that ensures you always have the latest security patches without manual intervention.
Verified Installation
All Bridge releases are cryptographically signed by SatoshiLabs. The installer verifies these signatures before installation.
Security Best Practices
- Only download Bridge from the official Trezor website
- Keep your operating system updated
- Use antivirus software and keep it updated
- Regularly check for Bridge updates
- Monitor Bridge service for unexpected behavior
- Use the desktop app (Trezor Suite) for enhanced security when possible
Important: While Trezor Bridge is designed with security in mind, the web version of Trezor Suite has different security considerations than the desktop application. For maximum security, use the desktop version of Trezor Suite when handling significant amounts of cryptocurrency.
Frequently Asked Questions
No, the desktop version of Trezor Suite includes built-in communication capabilities and doesn't require Trezor Bridge. Bridge is only needed for web-based interfaces like Trezor Suite Web, MyEtherWallet, or other web wallets that support Trezor.
Yes, Trezor Bridge works simultaneously with all supported browsers on your computer. You can have multiple browser tabs or different browsers accessing your Trezor device at the same time, though only one operation can be active at any given moment.
Bridge runs as a background service to maintain constant availability for browser communication and to handle USB device connections reliably. This ensures your Trezor is always ready when you need it, without having to manually start the Bridge each time.
Yes, Trezor Bridge is developed and maintained by SatoshiLabs, the creators of Trezor. It's open-source software that has been security audited. The Bridge doesn't handle private keys or sensitive data - it only facilitates communication between your secure hardware wallet and web applications.
Trezor Bridge automatically checks for updates and installs them in the background. You can also manually check for updates by visiting the Bridge status page at http://127.0.0.1:21325 or by downloading the latest version from the official website.
Yes, you have two options without Bridge: 1) Use the desktop version of Trezor Suite, which has built-in communication, or 2) Use the Trezor Suite mobile app with Bluetooth connectivity (Trezor Model T only). Bridge is only required for web browser access to your Trezor device.