Trezor Bridge

Introduction

Trezor Bridge is the secure communication layer that connects your Trezor hardware wallet with your web browser or desktop app. If you use the Trezor Suite or other compatible wallets in your browser, Trezor Bridge ensures that your device and computer talk securely — without exposing your private keys to the internet.

Whether you're sending crypto, verifying addresses, or upgrading firmware — Bridge is what makes it all possible, safely and seamlessly.

What is Trezor Bridge?

Trezor Bridge is a lightweight software utility that facilitates communication between your web browser (or desktop environment) and the Trezor hardware device. It replaces older browser plugins and extensions, offering a faster, more secure, and more private experience.

It runs silently in the background after installation and is required for:

• Connecting your Trezor device to Trezor Suite Web
• Communicating with third-party wallets like MyEtherWallet
• Signing transactions securely in the browser
• Verifying addresses and managing crypto assets

Key Features of Trezor Bridge

• Secure communication without browser plugins
• Cross-browser support (Chrome, Firefox, Brave, Edge)
• Automatic updates for reliability
• Lightweight & background operation

Installing Trezor Bridge

Installation is quick and safe. Follow the steps below:

1. Go to the official Trezor website: https://trezor.io/bridge
2. Choose your operating system (Windows, macOS, Linux)
3. Download and run the installer file
4. Follow the installation prompts
5. Restart your browser (if prompted)
6. Plug in your Trezor and open Trezor Suite Web

Never download Trezor Bridge from unofficial sources — doing so can expose your wallet to malware or phishing!

Supported Browsers & Systems

Trezor Bridge works on major desktop operating systems:

• Windows 10 and above
• macOS 10.11 or later
• Linux (Ubuntu, Fedora, Debian, etc.)

Supported browsers include:

• Google Chrome
• Mozilla Firefox
• Brave Browser
• Microsoft Edge

Mobile browsers like Safari and Android Chrome are not supported — use Trezor Suite Desktop or connect from a computer.

How Trezor Bridge Works

Once installed, Bridge runs in the background as a local service. When you open Trezor Suite or a supported wallet, the browser talks to Bridge via a local port, which in turn securely communicates with your Trezor hardware device.

All sensitive operations (such as PIN entry, signing transactions, seed generation) happen on the physical Trezor — never in the browser or operating system.

Security Architecture

• Local-only traffic: Data never leaves your machine
• Device-bound authentication: Even if malware is present, your Trezor must be physically confirmed for actions
• Sandboxed: Isolated from internet and system-level data

Troubleshooting Trezor Bridge

Common Issues & Fixes

• Device not detected? Restart your browser and replug the Trezor
• Bridge not installed? Visit trezor.io/bridge and reinstall
• Stuck loading? Clear browser cache and disable extensions that might block local ports (like ad blockers)
• Linux users: Ensure proper udev rules are installed (shown on Bridge page)

How to Check if Bridge is Running

You can verify that Bridge is working by visiting:
http://127.0.0.1:21325/status/

A JSON response like {"connected": true} means it's active.

Reinstalling Trezor Bridge

1. Uninstall the current version
2. Restart your computer
3. Download the latest version from Trezor.io
4. Install and verify functionality

Security Tips

While Bridge is designed with security in mind, here’s how to maximize your protection:

• Always verify you're on official Trezor URLs when downloading
• Don’t disable UAC or firewall to make Bridge work — fix the source issue instead
• Keep firmware and Bridge updated to latest versions
• Disconnect Trezor when not in use
• Use a strong PIN and backup your recovery seed offline

Trezor Bridge vs. Trezor Suite

Many users wonder about the difference:

• Trezor Suite (Web/Desktop): The user interface where you manage your crypto
• Trezor Bridge: The background service enabling secure communication between your wallet and device

If you're using the desktop version of Trezor Suite, you may not need Bridge — the app connects directly to your device.

Use Bridge only when interacting with the web version of Suite or third-party wallets.

Developer Resources

For developers, Trezor Bridge offers local communication for custom integrations.

• API Endpoint: http://127.0.0.1:21325/
• JSON-RPC methods
• Custom UI wrappers
• Compatible with WebUSB fallbacks

Learn more on Trezor's GitHub Repository.

Conclusion

Trezor Bridge is an essential tool that guarantees your wallet remains secure, efficient, and connected while using browser-based tools. It's designed for both novices and experts — lightweight, fast, and privacy-focused.

If you're planning to use Trezor Suite Web or connect your device with supported third-party wallets, installing Bridge is non-negotiable. It's your silent protector — keeping every interaction with your Trezor hardware wallet 100% local and 100% secure.