Download Trezor Bridge

Overview

Trezor Bridge is a small helper application provided by Trezor that acts as a secure intermediary between your Trezor hardware device and applications like Trezor Suite or browser-based wallets that use Trezor Connect. While modern browsers offer direct USB access via WebUSB, different operating systems and browser versions can present inconsistent experiences. Bridge provides a consistent, well-tested layer that handles device discovery, permission prompts, and cross-platform idiosyncrasies. It runs locally on your machine, does not upload device data, and only relays requests between authorized apps and your Trezor device. Importantly, cryptographic operations such as signing remain on the device; Bridge does not access your seed or private keys.

Download & Install (Step-by-step)

1. Visit trezor.io/start and choose the Bridge installer for your operating system (Windows / macOS / Linux). Always download from the official site — do not use third-party mirrors. 2. Run the downloaded installer. On Windows you may be prompted for administrative privileges — accept to allow driver registration. On macOS you may need to allow the app in System Preferences if Gatekeeper blocks it. 3. After installation Bridge runs in the background as a small local service. It usually starts automatically on login. 4. Connect your Trezor device using the original or a high-quality data USB cable. Open Trezor Suite or a supported web application. If the app recommends Bridge, follow the prompts to allow the connection. 5. If you are using a browser and face WebUSB permission prompts, accept them for the trusted host. Bridge often removes the need for additional browser permissions by providing a stable local endpoint.

Key features

Bridge’s responsibilities are intentionally minimal and focused: device discovery, secure IPC (inter-process communication), and acting as a local proxy for Trezor Connect. It improves reliability on systems where direct WebUSB is flaky, helps avoid driver conflicts, and supports automated interactions for desktop suites. Bridge also supports platform-specific integrations and is designed to be unobtrusive; it consumes minimal resources and stays out of the way of regular system workflows.

Why use Bridge?

Use Bridge when recommended by the application (for example older browser versions or certain OS combinations). It reduces friction, simplifies setup for non-technical users, and provides a more predictable connection path between the host app and your Trezor device. Institutions and users in managed environments (corporate machines with restricted browser policies) often prefer Bridge to avoid dealing with low-level USB permission policies.

Security model & assurances

Bridge is a local utility and never transmits your private keys or seed to any network. It solely relays local requests to the device and back. All signing operations occur on the Trezor hardware: when an application requests a signature, the device displays transaction information and requires manual confirmation. Bridge cannot sign or unlock wallets — it only facilitates the communication channel. Always verify downloaded installers from the official site and check signatures where provided.

Troubleshooting tips

If Bridge installation or device detection fails: • Try a different USB cable (use a data-capable cable — charge-only cables will not work). • Use a direct USB port on the computer rather than a hub. • Restart the Bridge service or your computer after installation. • On Windows, ensure required drivers are installed and that the app had administrative rights during install. • Check for conflicts with other apps that claim USB access. • If using a browser, ensure the page is loaded over HTTPS and you’ve granted any requested permissions. For persistent issues, collect logs from Bridge (if available) and consult the official support pages before sharing logs — always redact sensitive information and never share recovery seeds.

Best practices

Always download Bridge from trezor.io/start, keep the software updated, and use the official Trezor Suite or trusted web applications that employ Trezor Connect. Avoid entering your recovery seed into any website or app — seed entry should only be performed in secure recovery flows. For advanced privacy or security setups, use your own node for broadcasting transactions and choose minimal external services in the Suite settings.