HTML5

The foundational markup standard for the modern web, integrating native multimedia, semantic structure, and powerful APIs.

HTML5 serves as the backbone of the open web, replacing proprietary plugins with native elements like <video>, <audio>, and <canvas>. It introduced semantic tags (header, footer, article) that improved SEO and accessibility for millions of sites. Managed by the WHATWG as a Living Standard, it provides the essential framework for high-performance applications through features like Geolocation, Web Storage, and offline capabilities.

https://html.spec.whatwg.org/multipage/