WebAuthn and FIDO2 represent significant advancements in passwordless authentication, with over a third of organizations planning to adopt these technologies within the next few years. WebAuthn, a component of FIDO2, is an open standard for user authentication that utilizes public-key cryptography to enhance security by associating individuals with biometric or hardware security keys rather than passwords. FIDO2, developed by the FIDO Alliance, includes both WebAuthn and the Client-to-Authenticator Protocol (CTAP) to provide a comprehensive framework for secure, passwordless authentication across web and mobile applications. Although WebAuthn is integral to FIDO2, it can function independently, enabling developers to implement passwordless authentication in a wide range of software projects. Both WebAuthn and FIDO2 offer streamlined login processes and improved user experience by reducing reliance on passwords, which are prone to theft and mismanagement. Their widespread adoption is evidenced by major platforms incorporating these standards, making them accessible to a majority of global devices. Challenges in implementation include the complexity of user and device registration, especially within legacy systems, but solutions like Descope facilitate integration with no-code, drag-and-drop tools.