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: A localhost endpoint that creates a private link between browser and device.
- Cross-platform support: Available installers for Windows, macOS and common Linux distributions.
- Browser compatibility: Works with modern browsers supporting WebUSB or Bridge-based transports.
- Automatic updates: Keeps the desktop component current with security fixes.
- Lightweight: Small footprint and quick installation without background bloat.
Security and privacy
Bridge is built on security-first principles: it restricts communication to localhost, performs integrity checks, and never exposes private keys. Because cryptographic signing occurs on the Trezor device, Bridge functions as a safe transport layer. Always download Bridge from the official Trezor website and verify signatures or checksums when available to avoid tampered installers.
Installation & setup tips
Download only from official sources, verify checksums, close competing wallet apps during installation, and restart your browser after installing. If the device is not detected, try a different USB cable or port and ensure the cable supports data transfer (not charge-only).
Troubleshooting & best practices
If prompts are blocked, allow permissions for localhost connections, update to the latest Bridge version, and check OS driver settings on Windows or macOS if required. Keep device firmware and Bridge updated, verify addresses on-device before confirming, and store your recovery seed offline in a secure place.
Integrations and developer notes
Trezor Bridge integrates with popular wallets and dApps by providing a stable local API for secure signing and account management. Developers can use documented Bridge endpoints to test interactions without exposing private keys, simplifying browser integrations while preserving device isolation.
Short FAQ & resources
Is Bridge open source? Yes — source code and release notes are publicly available for audit. Does Bridge send keys online? No — sensitive keys remain on-device; only optional update checks may contact official servers. For verified downloads, guidebooks, and firmware updates, refer to official Trezor documentation and support channels.
Download Trezor Bridge