Trezor Bridge is the official communication software developed by SatoshiLabs that connects your Trezor hardware wallet with supported browsers and desktop applications. It runs locally on your computer and acts as a lightweight, private HTTP bridge that enables secure, reliable interactions between web wallets, browser extensions, and dApps. Without Trezor Bridge, modern web interfaces cannot safely access your device to sign transactions or verify addresses.
Why Trezor Bridge matters
Trezor Bridge keeps private keys isolated on the hardware device while translating browser requests into device-compatible commands. When you confirm a transaction or view an address, all sensitive operations happen on the Trezor itself — Bridge only forwards approved commands. This approach reduces compatibility friction, prevents accidental key exposure, and improves cross-browser reliability for desktop users.
Key features
- Local communication: Private link between browser and device.
- Cross-platform support: Windows, macOS, Linux installers.
- Browser compatibility: Supports modern browsers with WebUSB or Bridge-based transport.
- Automatic updates: Keeps the software current with security fixes.
- Lightweight: Small footprint and fast installation.
Security and privacy
Bridge restricts communication to localhost, performs integrity checks, and never exposes private keys. Cryptographic signing occurs on the Trezor device, so Bridge functions as a secure transport layer. Always download from the official Trezor website and verify signatures/checksums to avoid tampered installers.
Installation & setup tips
Download only from official sources, verify checksums, close competing wallet apps during installation, and restart your browser afterward. If the device is not detected, try a different USB cable or port that supports data transfer.
Troubleshooting & best practices
Allow permissions for localhost connections, update Bridge to the latest version, and check OS driver settings if needed. Keep firmware and Bridge updated, verify addresses on-device before confirming, and store your recovery seed securely offline.
Integrations & developer notes
Trezor Bridge integrates with popular wallets and dApps via a stable local API. Developers can use documented Bridge endpoints to test interactions safely without exposing private keys.
Short FAQ & resources
Is Bridge open source? Yes. Does Bridge send keys online? No — sensitive keys remain on-device. Refer to official Trezor documentation for downloads, guides, and firmware updates.
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