Trezor Bridge is a lightweight local application that enables secure communication between your Trezor hardware wallet and web browsers. When you use web-based wallet interfaces or decentralized applications (dApps) that support Trezor devices, Bridge acts as the official bridge software that makes USB and HID transports available to the browser while keeping your private keys isolated inside the hardware device.
Follow these steps to install and configure Trezor Bridge on your machine. The instructions below are intentionally detailed so you can validate each step while maintaining a high-security posture.
After downloading the installer for your platform, verify the file's integrity using the published SHA256 checksum and the vendor's signature if available. Never skip verification when dealing with cryptographic assets. On macOS and Linux, you can verify with sha256sum or shasum -a 256. On Windows, use PowerShell's Get-FileHash.
Once Bridge is running, plug your Trezor into a USB port. When you visit a web app that supports Trezor, the app will prompt you to allow access to the device. Confirm the prompt on both the browser and the Trezor device display. Never approve unexpected prompts on a site you do not trust.
Modern browsers increasingly restrict device access. Bridge provides a local server that the browser can use to route requests to the device. If your browser blocks access, check the site permissions and ensure Bridge is running. For some browsers, enabling WebHID or WebUSB in experimental flags might be necessary; consult official browser docs before changing flags.
If your browser cannot see the device or Bridge seems unresponsive, try these common fixes. Each step isolates a possible cause so you can restore a secure connection quickly.
Ensure the Bridge service is running. On Windows, check Services or Task Manager; on macOS, check Activity Monitor; on Linux, check your process list. Restarting the service often resolves transient issues.
Try a different USB port and a known-good cable. Avoid USB hubs between the device and the host machine. Some cables only provide power and not data.
Clear the site's permissions in the browser settings, then reload the page and retry the connect flow. If you previously denied access, the browser may remember that preference.
On some Linux setups you may need udev rules that map the device to a non-root user. On macOS, System Preferences > Security & Privacy may show prompts to allow Bridge to control the device — follow those steps carefully.
Trezor Bridge runs locally and is designed to minimize external telemetry. Bridge's purpose is to let your browser send API calls to the device without exposing private keys. It is best practice to:
Because Bridge operates on the local machine, it does not pool keys or transaction content to remote servers. When paired with a hardware wallet, signing operations always occur on the device's secure element. If you enable cloud backup features in other companion apps, make sure those backups are encrypted and you control the keys.
Bridge simplifies browser integration, but some advanced setups may rely on native drivers or browser-only transports. For most users and modern browsers, installing Bridge provides the smoothest experience.
No. Bridge is a transport layer and never accesses or transmits the seed phrase. The seed remains on the hardware device and is required only for recovery operations directly entered on a secure device.
Download the latest installer from the official source, verify signatures, and run the update. Some installations may offer an auto-update prompt; confirm it originates from the trusted vendor UI before proceeding.
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