Trezor Bridge

Trezor Bridge is the secure gateway between your Trezor hardware wallet and the web or desktop interfaces you trust. Connect, sign, and manage your crypto safely — without exposing private keys to the browser.

Quick facts

Trezor Bridge runs locally and exposes a trusted API so your browser and apps can communicate with your Trezor device. It reduces attack surface by preventing direct in-browser USB access.

  • Lightweight local daemon
  • Origin checks and signing flow
  • Works with Trezor Suite or web wallets

Overview — What is Trezor Bridge?

Trezor Bridge is the secure gateway between your Trezor hardware wallet and the applications you use to manage crypto. Instead of letting arbitrary website code speak directly to a USB device (which modern browsers restrict for security), Trezor Bridge exposes a controlled local API endpoint. Websites talk to that local Bridge, and Bridge enforces origin checks and the Trezor signing flow so your private keys never leave the device.

How Trezor Bridge helps security and usability

The Bridge architecture means your browser cannot silently access your wallet. All sensitive operations—like transaction signing—require the Trezor device to confirm actions on its physical screen. This separation of concerns improves both security and user experience: the browser handles UI, the Bridge handles secure connectivity, and the device remains the single source of truth.

Install & migration notes

For most users, the preferred and recommended way to use Trezor devices today is via Trezor Suite. Historically a standalone Trezor Bridge application provided connectivity; note that Trezor has published guidance about the deprecation and removal of the standalone Bridge and recommends updating to the latest Suite releases or following official upgrade instructions when required. Always download software from the official Trezor website or official GitHub releases to avoid phishing or tampered binaries.

Troubleshooting

If your browser cannot detect your Trezor: check for running Bridge/trezord processes, try reinstalling the latest Bridge or Suite installer from the official site, confirm your device firmware is up-to-date, and ensure no other wallet apps are holding exclusive access to USB. If you previously installed a standalone Bridge and encounter issues with newer Suite releases, follow the uninstall or migration steps provided by Trezor support.

Why this matters

Using a hardware wallet properly is one of the most effective ways to protect crypto assets. Trezor Bridge plays a critical but small role: it keeps device communication local, signed, and origin-checked. When paired with good device hygiene and official software, Bridge helps you keep your private keys offline and your signing operations visible and confirmed only on the device itself.

FAQ — Top questions about Trezor Bridge

A1: Trezor Suite is now the recommended interface for most users. Standalone Bridge was historically required for some browsers and apps, but Trezor has guidance on deprecation and migration to Suite. Use the official Trezor website for current recommendations.
A2: Bridge cannot access private keys; it only forwards signed requests to the device. All signing occurs on the Trezor hardware and requires confirmation on the device's screen—so private keys remain on the device.
A3: Always download Bridge or Trezor Suite from the official Trezor website or the official GitHub repository. Beware of phishing sites in search results; check domain and SSL certificate before downloading.
A4: Restart the browser, reconnect device, check for background trezord or Bridge processes, uninstall/reinstall Bridge or install Trezor Suite, and ensure no other application is holding USB access. If problems persist, consult Trezor support guides.
A5: Yes — Bridge was designed to let supported web apps and dapps talk to Trezor devices safely via a local API while enforcing origin checks and requiring on-device confirmations for sensitive operations.