The Website Specification
Tech News
Platform-agnostic website spec covering 128 topics from SEO to accessibility
An open-source project led by Yoast founder Joost de Valk, defining the full technical specification every good website should follow. Covers 128 topics across 10 categories — Foundations, SEO, Accessibility, Security, Performance, Privacy, and more — each linked to authoritative standards (WHATWG, W3C, IETF RFCs). Ships with an MCP server and llms.txt for both human developers and AI agents.