Introduction
What is Trezõr® Brïdge®?
Trezor Bridge is the secure communication layer between a Trezor hardware wallet and your web browser or desktop application. It safely forwards encrypted traffic from local apps and websites to your device, enabling transaction signing, account management, and firmware operations without exposing private keys. The Bridge runs locally — that means no private keys leave your hardware device.
Why Bridge matters
Security-first design
Trezor Bridge reduces attack surface by isolating the sensitive key operations on-device. When paired with a strong PIN and passphrase, the Bridge enables seamless operations while maintaining cryptographic guarantees. For institutions and advanced users, this design supports multi-account workflows, batch-signing, and integration with third-party wallets safely.
How it works (brief)
Local proxy and device handshake
Bridge runs as a local service and uses a one-time handshake to establish a secure channel with your browser and Trezor device. Commands like "sign transaction" are relayed to the device; the device displays transaction details for manual confirmation. Only after explicit user confirmation does the Bridge transmit signatures back to the requesting application.
Key security points
- Private keys always remain inside the Trezor hardware.
- Transactions are verified by the user on the device screen.
- Bridge never transmits secrets over the internet — it only acts locally.
Best practices
Installation and updates
Always download Bridge from official sources and keep it updated. Use the official firmware updater and confirm firmware fingerprints on the Trezor screen. Remove Bridge when not in use if you’re on a shared machine.
Operational hygiene
Use a dedicated device for significant holdings, create multiple backups of your recovery seed (stored physically in secure locations), and enable passphrase support for additional account separation. When interacting with dApps, double-check domain names and transaction details displayed on the Trezor device.
Common troubleshooting
If Bridge won’t connect
Restart the Bridge service, ensure your browser has permission to access local connectors, and try a different USB cable or port. If problems persist, consult the official support guides and community resources linked on the right.
Enterprise & developer notes
Integration options
Developers can build Bridge-aware integrations using the API and libraries provided by the vendor. Audit logs, deterministic firmware checks, and whitelist policies help organizations adopt hardware-wallet workflows while meeting compliance needs.
Developer reminder
Always test with non-production assets and simulate user confirmations.
Closing summary
In short, Trezor Bridge is a critical piece of secure crypto management for anyone using a Trezor device. It enables convenient yet safe interactions, provided users follow installation and operational best practices. Treat the Bridge as a trusted local tool — pair it with secure physical custody of your recovery seed and routine updates.