What is Trezor Bridge?
Trezor Bridge is a lightweight local service (a small background application) that enables secure communication between your Trezor hardware wallet and desktop applications or supported web browsers. It abstracts USB communication and provides a safe, cross-platform interface so apps like Trezor Suite can interact with your device without requiring direct USB driver manipulation by each application.
Why you need Trezor Bridge
Modern browsers limit direct USB interactions for security. Trezor Bridge runs locally and safely bridges these restrictions, ensuring that web apps and the Trezor Suite can exchange signed messages, read addresses, and initiate secure actions while keeping private keys on the device. It simplifies compatibility across Windows, macOS and Linux.
Download and install (quick steps)
- Download the latest Trezor Bridge installer from the official Trezor website. Choose the package for your operating system.
- Run the installer and follow the prompts. On macOS, you may need to allow the app in Security & Privacy if blocked.
- After installation, Trezor Bridge runs in the background. Connect your Trezor device via USB and unlock it with your PIN.
- Open Trezor Suite or a supported web app — it should detect your device through Bridge automatically.
Configuration & permissions
On some operating systems you may need to grant permissions (e.g., macOS kernel extensions or Windows security prompts). Follow on-screen instructions carefully, and only download Bridge from the official Trezor site. For Linux, ensure udev rules are configured if required by your distribution.
Troubleshooting common issues
Device not detected
Try a different USB cable or port; ensure the device is unlocked (enter PIN). Restart Trezor Bridge service or reboot the computer. On macOS, check Security & Privacy to allow the installer. On Linux, confirm udev rules are present and the user is in the correct group.
Bridge update required
If a web app requests a newer Bridge version, download and install the update from the official site. Restart the Bridge service after updating.
Browser fails to connect
Confirm Bridge is running (check system tray or process list). Clear browser cache, disable conflicting extensions, and try a different supported browser (Chrome, Firefox or Edge). Ensure the web app is on the allowed list and you accept connection prompts.
Security & privacy considerations
Trezor Bridge only facilitates local communication and does not access your recovery seed or private keys. Private keys remain securely on the Trezor device. Always download Bridge from the official Trezor site, keep the software up to date, and verify digital signatures if provided. If a connection prompt appears unexpectedly, deny and investigate.
Advanced tips
- Run Bridge in quiet mode for minimal UI interruptions.
- If you use multiple Trezor devices, label them within Trezor Suite to avoid confusion.
- On developer workloads, consult the Bridge API documentation for programmatic interactions and testing utilities.
FAQ
Is Bridge required for Trezor Suite?
Yes — Bridge is the recommended connectivity layer for browsers and some OS configurations. Trezor Suite may bundle or recommend a version during installation.
Can I use Bridge with multiple browsers?
Yes — Bridge enables compatible browsers (Chrome, Firefox, Edge) to detect and use your Trezor device. Make sure the browser is up to date and meets the platform requirements.