OpenSK is an open-source implementation for security keys written in Rust that supports both FIDO U2F and FIDO2 standards.

Convert your Android phone to any USB device you like! USB Gadget Tool allows you to create and activate USB device roles, like a mouse or a keyboard. 🛠🛡📱

Webauthn/FIDO2 library in golang

Arduino based firmware for FIDO2 Authenticator

W3C Web Authentication API Relying Party for Node.js and Express

FIDO2/ PassKey compatible authentication library

Test tool for CTAP2 authenticators

PassKeeZ is a FIDO2/ Passkey compatible authenticator implementation for Linux

YAFU - Yet Another FIDO Utility. FIDO2 toolbox in Java for USB/NFC devices.

FIDO2 PC/SC CTAPHID Bridge

FIDO2 roaming authenticator library for Android OS

Minimal FIDO2 library for microcontrollers

c# FIDO2.CTAP library

FIDO2: CTAP1/2 and WebAuthn

LionKey: An open-source FIDO2 USB Security Key 🔑 implemented on STM32H533. CTAP 2.1 compliant. Supports passkeys.

CTAP2 authenticator implementation in Zig

CTAPHID implementation

(experimental) WebAuthn4J CTAP is a kotlin FIDO CTAP2 library

Demonstration of writing data to a FIDO2 authenticator using WebAuthn and the CTAP 2.1 largeBlob extension. 🖥️

CTAPHID proxy for unprivileged access in Windows