Trezor® Bridge: Secure Communication for Web-Based Access

Trezor® Bridge is a lightweight background service that enables your Trezor® hardware wallet to communicate with web browsers when accessing Trezor® Suite Web. It acts as a secure translator, ensuring USB commands never expose your private keys online.

1. When Do You Need Trezor® Bridge?

Required ONLY for:
✅ Accessing Trezor® Suite via web browser
✅ Using third-party web apps (e.g., MetaMask) with Trezor®
Not required for:
❌ Trezor® Suite desktop app (download here)
❌ Trezor® Suite mobile app (iOS/Android)

2. How Trezor® Bridge Works

1. Installation:

• Auto-prompted on first web Suite access
• Manual download: trezor.io/bridge

1. Background Operation:

• Runs silently after installation
• Encrypts USB communication between browser ↔ Trezor® device

1. Trezor® Bridge Login:

• Simply means logging into web Suite via Bridge
• Your keys stay offline – Bridge never touches them

🔒 Security Note: Bridge is open-source, audited, and signed by SatoshiLabs (Trezor's maker).

3. Installing Trezor® Bridge: Step-by-Step

1. Connect Trezor® device via USB
2. Visit suite.trezor.io/web
3. Click "Install Bridge" when prompted
4. Download/run installer for your OS (Win/macOS/Linux)
5. Restart browser → return to suite.trezor.io/web

Troubleshooting? Get standalone installers at trezor.io/bridge

4. Trezor® Bridge vs. Desktop Suite: Key Differences

FeatureWith Bridge (Web Suite)Desktop SuiteInstallationBridge + BrowserSingle app downloadSecurityEncrypted local tunnelDirect USB communicationUpdatesManual Bridge updatesAuto-updates in-appOffline Use❌ Requires internet✅ Watch-only mode availableResource UseMinimal (background service)Moderate (full application)

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Trezor® Bridge FAQ: Solving Common Issues

Q1: Why does my browser say "Trezor device not detected"?

A: Ensure Bridge is installed/running. Restart browser and reconnect Trezor®. If persistent, reinstall Bridge from trezor.io/bridge.

Q2: Is Trezor® Bridge a security risk?

A: No. Bridge cannot access recovery seeds or private keys. It only passes encrypted messages between your browser and Trezor® device.

Q3: Do I need Bridge if I use the desktop Suite?

A: Absolutely not. Uninstall Bridge if you exclusively use the Trezor® Suite desktop app.

Q4: Can I use Bridge with mobile browsers?

A: No. Mobile requires the Trezor® Suite app + USB-C/OTG cable. Bridge is desktop-only.

Q5: "Invalid Bridge version" error – how to fix?

A: Download the latest Bridge (v2.0.31+) from trezor.io/bridge. Remove old versions first.

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Trezor® Ecosystem Cheat Sheet

• Initial Setup: Always start at trezor.io/start
• Daily Management: Use Trezor® Suite desktop app (no Bridge needed)
• Web Access: Install Bridge → suite.trezor.io/web
• Mobile: Trezor® Suite app (iOS/Android)
• Recovery: Your seed phrase (backed up at setup) is irreplaceable

Trezor® Bridge: Your trusted courier for browser-based security.