What is Trezor® Bridge?
Trezor® Bridge is a tiny, trusted utility that acts as the secure connection — the "bridge" — between your computer and your Trezor hardware wallet. It allows desktop apps and browser-based tools (like Trezor Suite and compatible web apps) to detect and communicate with your device safely.
This middleware is essential: without Bridge, your browser or wallet app often cannot reliably talk to the hardware wallet over USB. Bridge handles the handshake, encrypts the messages, and ensures only authorized applications get access.
Why it matters for security & management
- End-to-end encrypted messages — the private key never leaves your device.
- Only trusted, signed requests are forwarded to the Trezor device.
- Regular Bridge updates patch any protocol-level vulnerabilities quickly.
In short: Bridge is not just convenience — it is a key component in the secure chain of custody for your crypto. When installed from the official source, it helps defend against common attack vectors and makes device interactions predictable and reliable.
Key features at a glance
- Cross-platform — runs on Windows, macOS and Linux.
- Automatic updates — keeps communication protocols current.
- Lightweight — small footprint, low CPU and memory usage.
- Reliable USB handling — improved device detection and fewer connection errors.
- Compatibility — enables Trezor Suite and third-party integrations.
Step-by-step: Install & connect
1. Download safely
Always download Bridge from the official Trezor download page. Avoid unknown mirrors or attachments — official installers are signed and verified.
2. Run the installer
Follow the platform prompts. On Windows you may be asked to approve a signed installer; on macOS allow the app in Security preferences; on Linux follow the distro-specific steps.
3. Connect your device
Plug your Trezor into a direct USB port (avoid unpowered hubs). Your browser or Trezor Suite will now detect the device via Bridge and prompt you to unlock and confirm actions on the physical device.
Troubleshooting & tips
Common issues
- Device not detected: Reinstall Bridge, try another USB port, restart the browser.
- Browser prompts missing: Ensure you allowed the site to use Bridge and clear cache if needed.
- Permission errors: On macOS check Security & Privacy; on Linux check udev rules (official docs include distro steps).
Best practices
- Download only from trezor.io and verify installer signatures when possible.
- Run Bridge and Trezor Suite updates regularly.
- Use a direct USB port (avoid Bluetooth or hubs for the initial setup).
- Keep device firmware updated through Trezor Suite when a new release appears.
Advanced: integrations & power user features
Developers and advanced users rely on Bridge to enable third-party integrations and secure transaction signing for DeFi or dApp interactions. Bridge supports:
- Multi-account management via Trezor Suite
- Integration with browser-based wallets and DeFi dashboards (where explicitly supported)
- Secure signing for smart-contract interactions — the device always requires manual approval
Frequently asked questions
Is Trezor Bridge safe?
Yes. When downloaded from the official Trezor site, Bridge provides encrypted communication and is part of the recommended secure workflow. Private keys remain on the device at all times.
Do I need Bridge if I use Trezor Suite?
Trezor Suite (desktop app) bundles communication features, but Bridge is still useful for some browser integrations and ensures smooth USB handling across platforms. Installing Bridge is recommended when using web apps or if your OS requires it.
What if I lose Bridge or uninstall it?
You can always reinstall the latest Bridge from the official site. Uninstalling Bridge does not affect your wallet or recovery seed — your funds stay safe on-chain.