Trezor Bridge® is a communication tool developed by SatoshiLabs that allows Trezor hardware wallets to connect seamlessly with supported web browsers and online wallet interfaces. As cryptocurrency adoption expands, secure interaction between hardware wallets and web applications has become essential. Trezor Bridge plays a crucial role in that process, acting as a secure communication layer between the user's computer, browser, and their Trezor device.
Whether you are using your Trezor for managing assets, signing transactions, or interacting with third-party dApps, Bridge ensures the communication is secure, reliable, and effortless. This tool eliminates the need for browser plugins, reduces attack surfaces, and provides a more stable experience for users across multiple platforms.
Trezor Bridge® is a lightweight software service that runs on your computer and enables direct communication between web-based wallet interfaces and your Trezor hardware wallet. Without Bridge, most browsers would not be able to detect or interact with the hardware device due to security restrictions.
It works silently in the background, enabling operations like:
It replaces older connection methods like browser extensions, which have historically been more vulnerable to phishing and impersonation attacks.
Before Trezor Bridge®, hardware wallet communication relied mostly on browser extensions such as Trezor Chrome extensions. As browser security standards improved over the years, extensions became limiting and less secure. Additionally, many browsers dropped support for USB-enabled extensions altogether.
Trezor Bridge solves these issues by:
Allowing secure USB communication independent of browser restrictions
Eliminating vulnerabilities associated with browser plugins
Providing a unified, consistent experience across all major browsers
Offering better reliability and long-term compatibility
Because of these advantages, Trezor Bridge has become the recommended and default connection method for all Trezor users on desktop systems.
Trezor Bridge acts as a mediator. Once installed, it listens for requests from web interfaces (like Trezor Suite Web) and passes them securely to the connected hardware wallet.
Here's a simplified breakdown:
The browser sends a command to Bridge (e.g., "Detect device" or "Sign transaction").
Bridge authenticates the request and ensures it comes from trusted sources.
The command is forwarded to the hardware wallet via USB.
The user approves actions on the Trezor device itself.
Bridge relays the signed and verified response back to the browser.
This process ensures that private keys never leave the hardware wallet, and no sensitive data is exposed.
Bridge enables a secure channel that respects the hardware wallet's strict requirement: all sensitive actions must be confirmed on the physical device.
It protects against:
Unauthorized wallet access
Malicious web scripts
Browser-level attacks
Bridge never stores or transmits private keys.
Because many modern browsers restrict USB or HID communication from web pages, Bridge ensures device connection works smoothly across: