Trezör® Bridge® — Connect Your Web3 World Securely™

What is Trezor Bridge®?

Trezor Bridge® is the official communication layer provided by SatoshiLabs to allow your Trezor hardware wallet (Trezor One, Trezor Model T) to interact securely with web browsers, cryptocurrency exchanges, and decentralized applications (dApps). Unlike legacy browser extensions or USB drivers, Trezor Bridge runs as a small background application that securely proxies messages between web pages and your hardware device — ensuring that private keys never leave the device and that transactions must be approved on-device.

Why use Trezor Bridge®?

Security: Keys stay on the device; Bridge only relays approved actions.
Compatibility: Works with modern browsers and many web3 services.
Stability: Background service with automatic updates (when enabled).
Flexibility: Supports USB and selected WebUSB flows for smooth dApp interactions.

Before you begin

Have your Trezor device (Trezor One or Model T) and original USB cable ready.
Ensure your device firmware is up to date — firmware updates are cryptographically signed by Trezor.
Download Bridge only from the official source (Trezor’s website) — beware of lookalike domains.

1) Download & install Trezor Bridge®

Visit the official Trezor website's Bridge download page and select your platform (Windows/macOS/Linux).
Run the installer. On macOS you may have to allow the app in System Preferences → Security & Privacy if Gatekeeper blocks it.
After installation, the Bridge runs in the background and exposes a local connection used by compatible web apps to talk to your Trezor.

Tip: If a website prompts you to install Bridge, verify the domain and prefer to download Bridge directly from the official site first.

2) Connect your Trezor and pair with web interfaces

Open Trezor Suite or a supported web app (for example, a compatible dApp or exchange interface).
Connect your Trezor device via USB and enter your PIN on-device.
When the web page requests access, approve the connection on your Trezor device. Always check the origin domain and request details before approving.

Important: Never confirm a transaction or message on your device without verifying the details shown on the Trezor screen — phishing sites can display fake info in the browser.

3) Using Bridge with dApps and exchanges

Many decentralized applications and exchanges support hardware wallet connections via Bridge. Typical use cases:

Signing transactions for token swaps, DeFi actions, and NFT purchases — approve on-device.
Connecting to portfolio trackers or analytics dashboards to view balances (read-only access).
Importing public addresses to exchange accounts for withdrawals/deposits (never share your private keys).

Always cross-check addresses and amounts on your device. For contract interactions, review the method and parameters — if the Trezor displays a hashed or truncated view, be cautious and verify via a trusted block explorer.

Security best practices

Install Bridge only from the official Trezor download page.
Keep device firmware and Bridge updated; updates include security patches and improved compatibility.
Never enter your 12/24-word recovery seed into a website or app — secret phrases must only be written on paper or stored in secure hardware backups.
Prefer using Trezor Suite (official desktop app) for sensitive operations — it reduces exposure to malicious web content.
Use a strong device PIN and consider passphrase support (advanced users) for hidden wallets.

Troubleshooting common issues

Bridge not detected / web app can’t find device:

Restart Bridge (quit the app and relaunch) or reboot your computer.
Try a different USB cable or port — some cables are power-only and don't carry data.
Check browser permissions (especially for WebUSB flows) and allow the site to access the device if prompted.

macOS permission errors:

Open System Preferences → Security & Privacy and allow the blocked Bridge installer or driver extension.
Consider installing via Homebrew (advanced) if official installer fails — follow official docs.

Browser compatibility:

Bridge works with most modern browsers, but behaviors differ. If a site offers an extension or native integration, follow the dApp's recommended instructions.

FAQ

Do I need Trezor Bridge to use my device?: For most browser-based integrations, yes. Trezor Suite (desktop) can also manage devices without Bridge in some modes. Check Trezor’s official docs for platform-specific guidance.
Is Bridge safe?: Bridge is designed as a local proxy — it does not access or store private keys. Security depends on downloading Bridge from the official source, keeping it updated, and verifying on-device prompts.
Can Bridge access my seed phrase?: No. Bridge only transmits unsigned transaction data and commands; signing takes place on the Trezor device itself, which never exposes private keys or seeds.