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Trézor® Bridge® is the official, secure, and lightweight connectivity layer that empowers your Trezor® hardware wallet to communicate safely and effortlessly with computers, web browsers, desktop applications, and third‑party services. Developed and maintained by SatoshiLabs, the trusted creators of Trezor hardware wallets, Bridge plays a foundational role in the Trezor ecosystem — enabling secure interaction with your digital assets while preserving the integrity of your private keys at all times.
At its core, Trézor Bridge® is a background application that runs on your computer and silently manages communication between your Trezor device and software that needs to interact with it. Unlike browser extensions or legacy USB drivers, Bridge establishes a secure local communication channel that:
Detects and manages USB connections to your Trezor hardware wallet
Relays signed requests from software to the device and back
Keeps your private keys offline and isolated — where they belong
Works with a broad range of modern browsers and platforms
Instead of exposing your device directly to browsers (which may have limited USB capabilities or pose security risks), Bridge handles all sensitive transport and protocol negotiation behind the scenes.
Security is the defining principle of the Trezor philosophy: your private keys never leave the hardware wallet, and all critical operations are confirmed on‑device. Bridge advances this philosophy by acting as a trusted intermediary:
🔐 Enhanced Security
Bridge runs locally on your system, connecting only trusted applications to your Trezor wallet. It does not upload private keys to the internet, store them in memory, or expose them to browser vulnerabilities. Every signing request — whether sending funds, verifying an address, or installing firmware updates — is first routed securely through Bridge and then confirmed physically on the Trezor device itself.
🛡 Isolation from Browser Risks
Browser extensions have historically posed security challenges because they run with broad permissions. Bridge eliminates this risk by moving the communication layer out of the browser entirely. This minimizes exposure to malicious extensions, scripts, or untrusted content.
🔁 Consistency Across Platforms
Operating systems and browsers differ widely in how they handle USB device access. Bridge abstracts these differences so developers and users don’t have to deal with inconsistent behavior across Windows, macOS, or Linux.
Here’s a user‑friendly look at how Bridge functions whenever you want to interact with your Trezor wallet:
Connect Your Trezor: Plug your Trezor hardware wallet (Model One, Model T, or compatible unit) into your computer’s USB port.
Bridge Detects the Device: Trézor Bridge runs in the background as a local service. When a Trezor device is connected, Bridge recognizes it and prepares a secure communication channel.
Application Sends a Request: You open a compatible app — whether it’s Trezor Suite, a web wallet, MetaMask, MyEtherWallet, Electrum, or another dApp — and the application sends a command to Bridge asking to interact with the wallet.
Bridge Forwards the Command: Bridge securely relays that request to your Trezor over USB, ensuring only valid, authenticated commands are passed.
User Confirmation on Hardware: Sensitive operations (like signing a transaction or exposing account details) must be confirmed physically on the Trezor device itself — adding a critical layer of security against unauthorized actions.
Bridge Returns the Response: After the device signs or processes the request, Bridge relays the response back to the application — all without exposing sensitive key material to the host machine or browser.
Setting up Trézor Bridge is straightforward and only needs to be done once per system:
Download from the Official Source: Always download Trézor Bridge from the official Trezor site (e.g., trezor.io/bridge). Unofficial versions can be malicious or compromised.
Choose Your Platform: Bridge installers are offered for Windows, macOS, and Linux. Select the version that matches your operating system.
Run the Installer: Follow the on‑screen instructions. The Bridge service will be configured to run automatically in the background.
Restart Applications: After installation, restart your browser or wallet application to ensure they recognize the Bridge service.
Once installed, Bridge runs quietly. You’ll typically only see a system tray or menu bar icon indicating it’s active — most users never interact with it directly.
Trézor Bridge is designed to support broad usage and integrate with a wide ecosystem:
🔹 Operating Systems
Windows — including current supported versions
macOS — modern Intel and Apple Silicon builds
Linux — various distributions and package formats
🌐 Applications and Interfaces
Bridge enables communication with:
Official Trezor Suite (desktop or web version)
Browser‑based wallets and decentralized applications
Third‑party software like MetaMask, MyEtherWallet, and Electrum
Developer integrations that support Trezor hardware wallets
📈 Browser Support
Bridge works seamlessly with the latest versions of:
Google Chrome
Mozilla Firefox
Microsoft Edge
Brave and other modern Chromium‑based browsers
To ensure you get the most out of your Bridge experience while staying safe:
✔ Download Only from Official Sources
Always install Bridge from the official Trezor website. Phishing and imposter downloads could compromise your system.
✔ Keep Up with Updates
Bridge receives updates to maintain compatibility and security. You’ll be prompted when updates are available — keeping your installation current is recommended.
✔ Confirm Every Action on‑Device
Never enter your recovery seed or private keys on your computer. All critical confirmations should be done directly on the Trezor device’s screen.
✔ Use Trusted Browsers
While Bridge improves compatibility, using trusted, up‑to‑date browsers minimizes the chance of unexpected behavior.
As browser and operating system standards evolve, some connection methods (like direct WebUSB) are becoming more widely supported. In certain configurations — particularly on supported browsers like Chrome — direct connection without Bridge may be possible. However, Bridge remains the most compatible and secure fallback for web‑based access and third‑party integrations.
Whether you’re interacting with decentralized finance platforms, managing your portfolio in Trezor Suite, or integrating Trezor hardware into custom applications, Bridge continues to be a critical piece of the secure Trezor infrastructure.
Trézor Bridge® is more than just a utility — it’s a critical layer of security and convenience that makes managing crypto assets accessible and safe for users everywhere. By providing a secure, reliable communication channel between your Trezor hardware wallet and the tools you use, Bridge reinforces the core values of self‑custody, security, and user control that define the Trezor ecosystem.