Trezor Bridge — Desktop connector for your Trezor hardware wallet

Trezor Bridge is the lightweight, secure software that allows desktop browsers and apps to communicate with Trezor devices over USB. This page explains what Bridge does, how to install it, and how to keep your device interactions safe.

What is Trezor Bridge?

Trezor Bridge is a small helper application that runs on Windows, macOS, and Linux. It exposes a local API that modern web wallets and the Trezor Suite can use to talk to your Trezor hardware wallet. Unlike legacy browser plugins, Bridge runs as a native background app and handles device communication, permissions and firmware update checks.

Why you need it

Browser compatibility: Enables websites and Trezor Suite to access USB Trezor devices safely without native browser extensions.
Security boundary: Runs locally so your browser doesn't have to hold low-level USB permissions directly.
Automatic updates: Notifies and assists with firmware updates for your device via Trezor Suite.

Install & quick start

Follow these concise steps to install Trezor Bridge. Always download Bridge from the official Trezor website or the official GitHub releases page to avoid tampered installers.

  1. 1
    Download the installer for your OS from the official source.
  2. 2
    Run the installer and follow on-screen prompts. On macOS you may need to allow the app in System Settings → Security & Privacy.
  3. 3
    Connect your Trezor device via USB. Accept any device prompts to unlock and confirm the connection.
  4. 4
    Open your wallet interface (Trezor Suite or compatible web wallet) and follow pairing instructions.

Tip: If a website requests access to your Trezor, always verify the URL and only allow access for the session you intend.

Security & best practices

Bridge facilitates communication but cannot access your secret keys — those keys are stored inside the Trezor device itself. Still, follow these recommendations:

  • Only download Bridge from official sources and verify checksums when provided.
  • Keep your operating system and Bridge up to date to receive security fixes.
  • Never enter your recovery seed into a computer. Recovery should be done offline and with care.
  • Use a strong OS user account password and enable disk encryption where available.

Common issues & troubleshooting

Bridge not detected

Make sure Bridge is running. On Windows, look for the Trezor Bridge icon in the system tray; on macOS check Activity Monitor. Try reconnecting the device and using a different USB port or cable.

Browser blocked access

Confirm you have allowed the site to access the Trezor via the website’s prompt. Some browsers require you to explicitly permit the connection for each session.

Firmware or compatibility errors

If Trezor Suite requests a firmware update, follow instructions in-app. Do not interrupt power during a firmware install.

FAQ

Is Trezor Bridge safe?
Yes — Bridge is a local helper that forwards commands between apps and the device. It cannot read secrets inside the hardware wallet.
Do I need Bridge for mobile?
No — mobile uses different communication methods (typically WebUSB, USB-C OTG or Bluetooth depending on the model and mobile app).
Where can I find the installer?
Always fetch it from the official Trezor website or the Trezor GitHub releases page. Avoid third-party host sites.