YubiKey EVM Signer Demo

Browser Not Supported

WebUSB is only available in Chromium-based browsers (Chrome, Edge, Brave, Opera).

Please switch to a supported browser to use this demo.

WebUSB requires the browser to claim the YubiKey's CCID interface. This may conflict with system drivers:

macOS: Not Supported — The system's smart card driver claims the CCID interface, blocking WebUSB access. There is no practical workaround.
Linux: Supported — Works well. May require udev rules for non-root access.
Windows: Supported — Generally works. Some configurations with smart card drivers may have issues.
Android: Supported — Works with USB OTG adapter in Chrome.

For macOS, use the native Rust library with PCSC transport instead of this WebUSB demo.

Status: Disconnected

Requires HTTPS and user gesture. A device picker dialog will appear.

PIN (6-8 digits):

PIN Status: Not verified

Ethereum Address:

-

Warning: Generate New Key will overwrite any existing key in the slot.

Chain ID:

Nonce:

To Address:

Value (wei):

Gas Limit:

Max Priority Fee (wei):

Max Fee (wei):

Input Data (hex, optional):

Signed Transaction (RLP):

Typed Data JSON:

Signature:

Message:

Signature:

Hash (32 bytes, hex):

Signature: