Accessibility WCAG Standard

WCAG (Web Content Accessibility Guidelines) is the international standard for web accessibility, published by W3C (World Wide Web Consortium). WCAG 2.1 (2018) is current, with WCAG 3.0 in draft. It defines 78 accessibility criteria across 4 principles: Perceivable (can be seen/heard), Operable (can be navigated), Understandable (can be comprehended), Robust (works with assistive tech). Three conformance levels: A (minimum), AA (recommended, most jurisdictions mandate this), AAA (advanced, rarely required).