Trezor Bridge Official

Overview

Trezor Bridge is a lightweight, secure desktop service that acts as the communication layer between your Trezor hardware device and modern web browsers. When you connect a Trezor to your computer, the Bridge enables safe, permissioned interactions with wallet interfaces (like Trezor Suite and supported web wallets) — without exposing your private keys to the browser or remote servers.

Why Bridge exists

Browsers intentionally restrict direct access to USB devices for security reasons. Trezor Bridge creates a well-scoped, local bridge so that authorized web apps can request signatures, query account information, and interact with the device while the cryptographic secrets remain inside the hardware wallet.

How Trezor Bridge works (high level)

• Local service: Bridge runs as a local background process and listens on a secure localhost endpoint.
• Browser requests: When you visit a compatible wallet webpage, the site requests permission to talk to your device via the Bridge API.
• User confirmation: All sensitive actions—like signing transactions—must be confirmed on the physical Trezor device. Bridge only forwards requests; it never holds keys.
• Transport safety: Communications use short-lived session tokens and strictly scoped endpoints to minimize attack surface.

Typical flow

Connect Trezor → Browser detects device → Wallet asks Bridge for a connection → Bridge asks OS to access USB → Trezor prompts user to confirm on-device → Action completes.

Installation and setup

Installing Trezor Bridge is fast and supported on Windows, macOS and Linux. Visit the official download page to get the correct installer for your OS.

Permissions & browser prompts

Because Bridge mediates access, your browser may ask to allow the local Bridge connection — this is normal. Only grant access when you initiated the connection from a wallet you trust. Bridge will display a small tray or menu icon on some platforms when active.

Security model — what remains inside the device

Trezor Bridge is a conduit only. Your seed phrase, private keys, and PIN never leave the device. Bridge cannot sign transactions on its own — it simply relays signing requests, which require physical confirmation on the Trezor hardware.

• Zero-knowledge possession: Private keys stay in the secure chip.
• User approval: All critical operations require on-device confirmation.
• Local-first: Bridge runs locally; remote access to the Bridge service is not possible by default.

Troubleshooting common issues

If your browser or wallet doesn't detect your Trezor, try these steps first:

• Verify Bridge is installed and running (check system tray / menu bar).
• Reconnect the USB cable — try a direct port (avoid hubs) and a known-good cable.
• Restart the browser (some browsers require a relaunch to pick up the Bridge service).
• Update Trezor firmware and the Bridge package to the latest stable versions from the official site.

Advanced tips

For power users: on Linux, ensure your udev rules are installed (these allow non-root access to the device). On macOS, check System Preferences → Security & Privacy if a driver or network permission was blocked.

Compatibility & supported browsers

Trezor Bridge is designed to work with modern evergreen browsers such as Chrome, Edge, Brave and recent Firefox releases. Because Bridge uses a localhost API, make sure your browser is up-to-date for the best compatibility and security behavior.

Integration with web wallets

Many decentralized apps and web wallets integrate with Trezor via Bridge to provide a seamless experience: account discovery, balance checks, transaction building and signing. When using third-party wallets, confirm the origin (URL) is correct and served over HTTPS before allowing a connection.

Best practices

• Only download Bridge from the official Trezor website: trezor.io.
• Keep your firmware and Bridge updated to benefit from security fixes and improved browser compatibility.
• Always confirm transaction details on the device screen before approving.
• Use a secure OS account and avoid installing untrusted browser extensions that could attempt to mimic wallet interfaces.

Conclusion

Trezor Bridge is the reliable, secure connector that brings hardware-backed key protection to browser-based wallet experiences. It preserves the separation of secrets and user interface, giving you the convenience of web wallets while keeping cryptographic keys protected inside your device. Whether you're checking balances, managing multiple accounts, or signing transactions, Bridge helps ensure those operations stay under your control — safe, local, and transparent.

Ready to get started? Click the button below to visit the official Trezor start page and download Bridge for your platform.