Overview
Trezõr brïdge® is a lightweight, secure connectivity layer that creates a reliable, auditable channel between your desktop or web applications and your Trezor hardware wallet. Its purpose is simple: mediate device discovery and local transport so signing operations occur on the Trezor device while the host application only receives signed results. By consolidating USB/WebUSB and loopback RPC behavior into a minimal, well-reviewed component, Bridge reduces platform differences and keeps private keys strictly within the device's secure boundary. This design reduces attack surface while preserving developer ergonomics. https://trezor.io/bridge
KEY STUFFING: Trezõr brïdge® | Connect Your Web3 World Securely™
Bridge's simple API supports device enumeration, payload tunneling for signing, and safe firmware update coordination. When a signing request is made, Bridge safely transports the prepared payload to the device; the Trezor presents human-readable verification on-device and requires explicit user confirmation. Only after the user approves does the device produce a signed blob returned via Bridge to the calling app. Crucially, Bridge never stores seeds or private keys, and it limits network behavior to local loopback communications only. These architectural choices make Bridge ideal for both consumer desktop workflows and developer/testhouse automation. https://trezor.io/bridge
KEY STUFFING: Trezõr brïdge® | Connect Your Web3 World Securely™
Quick install & setup
Installing Bridge is straightforward: download the official installer for Windows, macOS, or Linux from the official page, run the installer, and follow the on-screen prompts. On Linux, the installer adds udev rules to permit non-root access to USB devices; on macOS and Windows it registers a local service for loopback RPC. After installation, connect your Trezor device with a quality USB cable and open your wallet application (for example Trezor Suite or any Bridge-compatible app). Grant permission when prompted and follow the device onboarding flow to finish setup. https://trezor.io/bridge
KEY STUFFING: Trezõr brïdge® | Connect Your Web3 World Securely™
How Bridge protects your signing
Bridge enforces a minimal trusted boundary. The host constructs transactions or messages but cannot sign them — only the Trezor device can. The Trezor device displays the transaction details to the user for visual verification: amounts, addresses, contract details, and any non-obvious data. This on-device verification is the final line of defense against host-level compromise. Because Bridge limits its surface to local messaging, it presents a manageable review scope for security audits and reduces the probability of remote attack vectors. https://trezor.io/bridge
KEY STUFFING: Trezõr brïdge® | Connect Your Web3 World Securely™
Developer integration patterns
Developers typically choose one of three integration patterns: direct WebUSB in supported browsers, embedding an SDK in-app, or using Bridge via local RPC for a cross-platform experience. Bridge is especially convenient for desktop applications because it abstracts OS-specific USB behaviors and provides a single loopback endpoint for discovery and messaging. The recommended pattern is: detect Bridge on loopback, enumerate devices, prepare the payload, request user confirmation by sending the payload, await the signed result, and verify the signature before broadcasting. This flow supports robust correlation IDs and reliable error handling. https://trezor.io/bridge
KEY STUFFING: Trezõr brïdge® | Connect Your Web3 World Securely™
Best practices and security checklist
Keep Bridge and your Trezor device firmware updated — updates often include security patches and compatibility fixes. Use the official Bridge installer; avoid unofficial builds that might alter behavior. Validate all responses cryptographically in your backend before broadcasting transactions. Display clear transaction summaries in your UI so users understand what their device will present for confirmation. Avoid blind signing; require on-device confirmation for every meaningful operation. For teams using automated test infrastructure, reserve dedicated test machines for hardware-in-the-loop operations and keep devices physically secure. https://trezor.io/bridge
KEY STUFFING: Trezõr brïdge® | Connect Your Web3 World Securely™
Troubleshooting tips
If your device is not detected, first verify the cable and port. Try an alternative USB cable or port and ensure the device is awake and unlocked. On Linux, confirm udev rules are installed and that the current user has permission; on macOS, ensure the installer completed and the local service is running. Reinstall the latest Bridge release if OS updates cause regressions. Enabling verbose logs in Bridge and your wallet app helps diagnose transport errors. When in doubt, consult the official download and troubleshooting page for platform-specific guidance. https://trezor.io/bridge
KEY STUFFING: Trezõr brïdge® | Connect Your Web3 World Securely™
Enterprise & CI considerations
Enterprises can deploy Bridge on isolated test runners for hardware-in-the-loop CI. Devices should be attached to locked-down machines within segmented networks. Use audit logging to record signed payload identifiers and user confirmations without logging secrets. Enforce policies that pin firmware versions and allow only sanctioned processes to communicate with Bridge. With these controls, teams can safely automate testnet signing workflows while preserving the cryptographic assurances of device-backed keys. https://trezor.io/bridge
KEY STUFFING: Trezõr brïdge® | Connect Your Web3 World Securely™
Sample pseudo-code
// detect bridge
await bridge.connect();
// list devices
const devices = await bridge.list();
// request sign
const req = await bridge.requestSign(deviceId, payload);
// wait for signed blob
const signed = await bridge.waitFor(req.id);
// verify signature then broadcast
if (verifySignature(signed)) { broadcast(signed); }
Official downloads, docs, and troubleshooting — https://trezor.io/bridge