How Trezor Bridge Works
Trezor Bridge runs on your computer as a small, trusted helper service. When you open a compatible wallet website, the browser communicates with Bridge over a local API. Bridge forwards only signed requests to your Trezor device and never uploads private keys anywhere.
Local-first design
Direct device communication — private keys stay on the hardware.
Cross-platform
Available for Windows, macOS and Linux with small installer sizes.
Automatic updates
Security patches delivered safely while preserving user consent.
Security best practices
- Download Bridge only from the official Trezor website.
- Verify installer signatures when possible.
- Use PIN and passphrase protection on your Trezor device.
- Keep your OS and browser updated to reduce attack surface.
Frequently Asked Questions
- 1. Do I need Bridge for every wallet?
- Only for wallets and web apps that use the local Bridge API. Many modern wallet UIs will prompt you to install it if needed.
- 2. Is Bridge open source?
- Yes — Trezor publishes source code and release notes. Open-source code enables independent audits and verification.
- 3. What if Bridge asks for network access?
- Bridge primarily communicates locally; any network requests are for updates or telemetry (opt-in). Review settings during install.
- 4. Can attackers steal my coins through Bridge?
- Bridge never exposes private keys. Attackers would need physical access or compromise your OS/browser and device PIN to extract funds.
- 5. How do I troubleshoot connection problems?
- Restart Bridge, reconnect the device, try a different USB cable/port, and consult the official troubleshooting guide.