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Trezor Bridge
Secure device connectivity · trezor.io/start

Trezor Brídge — a secure communication layer for your hardware wallet

Bridge is the small, trusted helper that connects your Trezor hardware device to desktop and web apps. It handles USB permissions, encrypted messaging, and compatibility nuances so you can use Trezor Suite and other applications without exposing private keys. Learn how to install, verify, and troubleshoot the Bridge safely.

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Core Features

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Secure USB Communication

Bridge handles low-level USB and OS permission prompts so apps can communicate with your Trezor securely. It ensures messages are routed only to trusted processes.

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Encrypted Message Relay

All traffic is encrypted between Suite and your device. Bridge never holds private keys — it only passes signed or unsigned payloads to the device for user confirmation.

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Cross-platform Support

Available for Windows, macOS, and Linux with installers and checksums. Bridge adapts to each OS’s permission model to create a smooth connection experience.

Troubleshooting & Best Practices

If Bridge fails to connect, restart the application and reconnect your device. Check for OS-level USB permissions, ensure you’re using the official installer from trezor.io/start, and verify the checksum if you suspect tampering. Avoid installing Bridge from third-party sources and keep the software updated.

Common fixes include toggling USB modes, using a different cable, or restarting the browser for web-based Suite. For persistent issues, check logs and consult official support channels before sharing any sensitive info. Remember: Bridge is only a helper — your private keys remain on the Trezor device at all times.

Detailed Guide

Installing Trezor Bridge is a small but important step in using Trezor hardware wallets on desktop and web platforms. Bridge acts as an intermediary that negotiates USB connectivity and provides a consistent API for apps like Trezor Suite. The installation process varies slightly across operating systems: Windows installers are signed, macOS packages may require notarization permissions, and Linux distributions commonly use AppImage or deb/rpm packages. Always prefer the official download page to avoid supply-chain attacks.

Once installed, Bridge runs as a background service and listens for authorized connections. When a compatible app attempts to connect, Bridge will surface a permission prompt; approve only the processes you trust. This minimizes the risk of rogue applications attempting unauthorized communications. While Bridge simplifies connectivity, it does not and cannot access private keys: all signing occurs on-device with your explicit confirmation on the Trezor screen.

Operational security practices remain essential. Use strong PINs, store your recovery seed offline, and avoid plugging your device into unknown or public computers. Bridge helps with safe connections but cannot compensate for poor handling of the physical device or seed phrase. If you’re using a web browser, make sure it is up to date and that you access Suite or third-party apps from trusted domains only.

For developers, Bridge exposes a documented API to integrate hardware wallets into applications safely. Follow official SDKs and examples rather than crafting raw USB interactions to prevent subtle security mistakes. Testing in isolated environments and leveraging cryptographic best practices ensures robust integrations.

In summary, Trezor Bridge is a practical, security-focused tool that smooths the gap between hardware and software. By managing OS quirks, USB permissions, and encrypted message relays, it enables a safer and more seamless experience for users while preserving the core principle: private keys never leave the device.

Adopting Bridge as part of your Trezor workflow brings convenience without compromising security. Install only from trezor.io/start, verify downloads, and keep both Bridge and your device firmware current. With these steps, you’ll enjoy reliable connectivity and peace of mind when managing your crypto assets.