Trezor Bridge — Secure connection between your computer and your Trezor

Trezor Bridge is a lightweight, trusted background application that enables secure USB communication between your computer and Trezor hardware wallets. Bridge simplifies setup, improves compatibility across browsers and operating systems, and ensures that every command to your device is explicit, authenticated, and user-approved.

Quick start

Download and install Trezor Bridge for your platform.
Connect your Trezor device to the computer via USB.
Open Trezor Suite or your supported web app; Bridge will handle the connection.
Confirm actions on the physical device — signing always requires confirmation.

Tip: Bridge runs in the background. If you update your browser or OS, restart Bridge to re-enable USB permissions.

Why Trezor Bridge matters

Connecting a hardware wallet to the digital world is a sensitive operation. Trezor Bridge exists to make that bridge (yes, pun intended) safe, consistent, and user-friendly. It resolves compatibility issues that otherwise arise when browser APIs change, protects user consent flows, and centralizes the communication layer so login-less, privacy-respecting experiences remain possible across platforms.

Reliable compatibility

Browser vendors periodically change how USB devices are exposed to web pages. By using a lightweight native application, Bridge provides a stable interface for web apps and the official Suite to interact with Trezor devices no matter the browser updates. That reduces friction for users and prevents broken integrations after browser upgrades.

Enhanced user experience

Users no longer need to juggle browser flags or install browser-specific extensions. Bridge handles permission requests and ensures the connection is fast and responsive. For many users this is the difference between a confusing setup and a one-click experience.

Developer friendly

Developers building integrations or web apps can rely on a consistent IPC (inter-process communication) endpoint. Bridge exposes a clear API that partners and open-source projects can leverage to support Trezor devices without embedding low-level USB logic in their projects.

Privacy by design

No account is required to use Bridge. It does not collect identifying data by default; telemetry is optional and opt-in. Bridge's role is strictly to route messages between the host app and the device while preserving user control over all signing and confirmation steps.

Security model

Security is the core objective. Bridge is intentionally minimal: it does not hold keys, it does not sign anything, and it never stores your recovery seed. The device, not the host, is the only place where private keys ever exist. Bridge acts as a messenger; the device cryptographically signs transactions and operations and the user must always confirm actions on the Trezor device itself.

Key protections

Device-only signing: Private keys remain on the device. Bridge forwards requests and the device returns signed responses after user confirmation.

Firmware verification: Trezor devices verify firmware signatures to ensure authenticity prior to exposing cryptographic functions.

Transport isolation: Bridge isolates USB communication from web pages and other processes, reducing the attack surface.

Updating & auditing

Bridge releases are versioned and published alongside release notes. The codebase is open for inspection and regularly reviewed by security researchers. If you receive prompts to install Bridge, always use official distribution channels and verify signatures where provided.

Advanced usage & troubleshooting

Bridge includes diagnostic tools for power users and support teams. If you run into connection problems, follow these steps:

Confirm Bridge is running (look for the background service icon or check your system processes).

Restart Bridge after OS or browser updates to refresh USB permissions.

Confirm the USB cable and port support data (some charge-only cables won't work).

Try another port or another computer to isolate the issue.

Enterprise deployments

Organizations deploying many Trezor devices can script installation and apply policies for automatic updates, whitelisting, or pinned versions. Bridge supports silent installs and can be packaged into automated deployment pipelines for teams managing hardware wallets at scale.

FAQ — common questions

Q: Do I need Bridge to use Trezor Suite?
A: In most desktop setups, yes — Bridge provides the secure USB layer Suite uses. On some platforms there are native integrations; consult documentation for your operating system.

Q: Is Bridge safe to install?
A: Yes — Bridge is a small, open-source utility whose sole purpose is to facilitate communication with Trezor devices. It does not store secrets or sign transactions.

Q: My browser still can't see my Trezor. What now?
A: Restart Bridge, ensure you gave the browser USB permission, use a data-capable cable, and try disabling conflicting extensions. If problems persist, check the Bridge diagnostic logs and reach out to support.

Q: Does Bridge send telemetry?
A: No telemetry is sent unless you explicitly opt-in. Bridge's default behavior prioritizes privacy.