WebAuthn, launched by the World Wide Web Consortium (W3C) and the FIDO Alliance in March 2019, is a web standard and API designed to eliminate traditional password-based authentication by utilizing cryptographic methods for secure and user-friendly logins. Supported by most browsers and devices, WebAuthn replaces vulnerable shared secrets with a public-private keypair system, enhancing security against phishing and credential theft. The standard is integral to the FIDO2 protocol, enabling authentication through biometrics, hardware keys, or device PINs. Major companies like Amazon, Microsoft, and Branch Insurance have adopted WebAuthn, reporting improved security and user experience, with Microsoft noting a significant increase in successful sign-ins compared to traditional passwords. Although WebAuthn adoption is not yet universal, it offers substantial security benefits and a streamlined user experience, while challenges such as a lack of universal adoption and misconceptions about its functionality remain. As more organizations implement WebAuthn, it is expected to further diminish reliance on passwords, providing a more secure and efficient authentication method across various platforms.