Official Site® — Trezor Bridge | Getting Started

A concise, colorful introduction to Trezor Bridge: what it does, how to install it safely, how to use it with web3 apps, security & privacy tips, and quick troubleshooting.

What is Trezor Bridge?

Trezor Bridge is a lightweight, local helper application that enables browsers and web-based decentralized applications (dApps) to communicate securely with your Trezor hardware wallet connected by USB. Browsers intentionally restrict direct USB access for safety—Bridge provides a trusted, local channel so dApps can request public keys or signing operations while keeping your private keys on the device.

Why use Bridge?

  • Compatibility: Many dApps and wallets rely on Bridge to support a wider set of browsers and OS configurations.
  • Security: Bridge only relays requests — the Trezor device displays transaction details and requires on-device confirmation.
  • Local control: It runs locally and does not upload your keys or seeds to the cloud.

Safe installation — step-by-step

  1. Download only from the official site. Go to Trezor's official downloads or support page; avoid links from social media or unknown emails.
  2. Choose the right installer. Select the package for your OS: Windows, macOS, or Linux.
  3. Verify integrity (when provided). If a checksum (SHA‑256) or PGP signature is published, compare it with the downloaded file to ensure it wasn't tampered with.
  4. Run the installer. Follow OS prompts; on macOS you may need to allow the app in Security & Privacy settings.
  5. Confirm Bridge is running. Look for a tray icon or system service; Bridge listens on localhost and is ready to accept requests from supported browser dApps.

Tip: Keep Bridge updated — installers often contain security and compatibility fixes.

Using Bridge with dApps & wallets

Typical workflow when connecting a dApp to your Trezor:

  1. The dApp requests a hardware wallet connection in the browser.
  2. Bridge receives the request on localhost and forwards it to your connected Trezor device.
  3. The device shows readable transaction details on its screen. Verify the recipient, amounts, and contract data.
  4. Physically confirm on the Trezor device to sign; Bridge relays the signed data back to the dApp, which broadcasts it to the network.

Always verify every transaction on the device — that's the primary defense against compromised hosts or malicious web pages.

Security & privacy — what to watch for

  • Approve only trusted sites. When a website requests Bridge access, allow it only if you trust the origin.
  • Never expose Bridge to the internet. Bridge is designed for local use; do not forward its ports or configure remote access.
  • Device is the single source of truth. If the address/amount shown on your device differs from the web UI, do not approve the transaction.
  • No key storage. Bridge never stores private keys or seeds; those remain on the Trezor.
  • Minimal permissions. Grant Bridge access temporarily when needed and close tabs or stop the service when finished for extra caution.

Troubleshooting quick guide

  1. Bridge not detected: Ensure the service is running (system tray / background services) and restart it if needed.
  2. Browser can't connect: Try a supported browser, disable blocking extensions, or restart the browser with Bridge running.
  3. Permission prompts missing: Look for small notifications in the address bar or browser UI; some browsers block localhost calls by default.
  4. Transport errors: Use the original USB cable, avoid hubs, and ensure Trezor firmware is up to date.