Fix common connection issues with our comprehensive troubleshooting guide. Step-by-step solutions for Windows, Mac, and Linux systems to get your Trezor device working again.
Try these solutions first - they resolve 90% of Trezor Bridge connection issues
The simplest solution that often works. Follow these steps in order:
USB connection issues are the most common cause of Bridge problems:
If basic fixes don't work, reinstall the Bridge application:
Antivirus and firewall can block Bridge communication:
Identify your specific issue from these common Bridge error symptoms
Bridge cannot find your connected Trezor device
Trezor Bridge service is not active or crashed
Bridge cannot establish connection with device
System blocking Bridge from accessing device
Missing or corrupted USB drivers for Trezor
Bridge or firmware version incompatible
Detailed fixes tailored for your specific operating system
Open Device Manager and look for your Trezor under "Universal Serial Bus devices". If you see a yellow exclamation mark, the driver needs attention.
Right-click your Trezor device in Device Manager and select "Update driver". Choose "Search automatically for updated driver software".
Sometimes Bridge needs elevated permissions. Right-click Trezor Suite and select "Run as administrator".
Ensure the Trezor Bridge service is running:
macOS may block Trezor Bridge. Go to System Preferences → Security & Privacy → General and allow Trezor Bridge if it's blocked.
Grant USB access to Trezor Bridge in System Preferences → Security & Privacy → Privacy → USB.
Force quit any running Bridge processes:
Add your user to the plugdev group and create udev rules:
Download and install Trezor udev rules:
Restart the Bridge service and reload udev rules:
Best practices to avoid Trezor Bridge connection problems
Regularly update Trezor Suite, Bridge, and device firmware to the latest versions.
Always use the original USB cable or high-quality certified alternatives.
Connect directly to computer USB ports, avoid hubs and extensions.
Add Trezor Suite to your antivirus and firewall exception lists.
Quick answers to common Trezor Bridge questions
Trezor Bridge is a communication tool that allows your web browser and Trezor Suite to connect with your Trezor hardware wallet. It translates USB communication to a format that web applications can understand, enabling secure transaction signing and device management.
Yes, even with the desktop app, Trezor Bridge is required for device communication. The desktop app includes Bridge functionality, but it may need to be manually installed or updated in some cases.
Visit http://127.0.0.1:21325 in your browser. If Bridge is running, you'll see a status page. If not, you'll get a connection error. You can also check running processes in your system task manager.
For basic usage with third-party wallets like Electrum or MyEtherWallet, you might not need Bridge as they use different communication methods. However, Trezor Suite requires Bridge for full functionality.
System updates can reset USB permissions, change security settings, or conflict with existing drivers. This is why reinstalling Bridge after major system updates often resolves connection issues.
If none of these solutions worked, our support team is ready to help you get connected.
Contact Trezor Support