Trézór Bridge®™ | Secure Crypto Connectivity
Introduction
Trezor Bridge is a communication tool that allows Trezor hardware wallets to connect securely with web-based wallet interfaces through a browser. Before the introduction of modern browser standards like WebUSB, Trezor Bridge played a critical role in enabling interaction between Trezor devices and online applications.
Although its role has evolved over time, Trezor Bridge remains important for certain systems, browsers, and legacy setups. This guide explains what Trezor Bridge is, how it works, when it is required, and how it compares to newer connection methods.
What Is Trezor Bridge?
Trezor Bridge is a background communication service installed on your computer. It acts as a secure middle layer between:
- Your Trezor hardware wallet
- Your web browser
- Web-based wallet interfaces such as Trezor Suite Web or third-party services
Instead of allowing a browser to communicate directly with the hardware device, Trezor Bridge handles the connection safely and reliably.
Why Trezor Bridge Exists
Earlier web browsers did not natively support secure USB communication with hardware wallets. To solve this, Trezor Bridge was developed to:
- Enable device detection in browsers
- Ensure stable USB communication
- Reduce compatibility issues across operating systems
- Improve security by isolating device communication
While modern browsers now support WebUSB, Trezor Bridge is still useful in specific scenarios.
When Do You Need Trezor Bridge?
You may need Trezor Bridge if:
- You are using older browsers that do not fully support WebUSB
- You access legacy web wallets or services
- Your system has compatibility issues detecting the device
- You prefer a background service instead of browser-based permissions
For most users today, the Trezor Suite Desktop application does not require Trezor Bridge.
Trezor Bridge vs WebUSB
| Feature | Trezor Bridge | WebUSB |
|---|---|---|
| Installation required | Yes | No |
| Runs in background | Yes | No |
| Browser dependency | Low | High |
| Modern default | No | Yes |
| Legacy support | Yes | Limited |
WebUSB is now the preferred method, but Trezor Bridge remains available for backward compatibility.
How Trezor Bridge Works
Once installed, Trezor Bridge:
- Runs silently in the background
- Detects when a Trezor device is connected
- Allows approved web applications to communicate with the device
- Forwards commands securely without exposing private keys
All sensitive operations, including signing transactions, still occur inside the Trezor device.
How to Install Trezor Bridge
The safest way to install Trezor Bridge is through the official Trezor website:
Installation steps typically include:
- Downloading the correct version for your operating system
- Running the installer
- Restarting your browser
- Connecting your Trezor device
Once installed, Trezor Bridge usually requires no further configuration.
Security of Trezor Bridge
Trezor Bridge does not store private keys, recovery seeds, or sensitive wallet data. Its security model ensures:
- Private keys never leave the hardware wallet
- All actions require physical confirmation on the device
- Communication is restricted to approved applications
This design maintains the same high security standards as the rest of the Trezor ecosystem.
Common Trezor Bridge Issues and Fixes
Device not detected
- Restart Trezor Bridge service
- Try a different USB port or cable
- Close other wallet applications
Browser conflicts
- Disable conflicting extensions
- Try a supported browser
Bridge already installed but not working
- Reinstall the latest version
- Restart your computer
Do You Still Need Trezor Bridge in 2026?
For most users, no. The recommended setup today is:
- Trezor Suite Desktop (no Bridge required)
- WebUSB for browser-based access
However, Trezor Bridge remains valuable for legacy systems and compatibility troubleshooting.
Best Practices
- Use Trezor Suite Desktop whenever possible
- Install Trezor Bridge only from official sources
- Keep your operating system updated
- Avoid running multiple wallet services simultaneously
- Never enter your recovery seed into a browser
Trezor will never ask for your recovery seed online.
Conclusion
Trezor Bridge is a legacy yet still relevant component of the Trezor ecosystem. While newer technologies like WebUSB have reduced its necessity, Trezor Bridge continues to provide reliable device communication for specific use cases.
Understanding when and why Trezor Bridge is needed helps users choose the safest and most efficient way to connect their Trezor hardware wallet and manage their digital assets with confidence.