What is the Web Content Accessibility Guidelines (WCAG)?
WCAG is a set of internationally recognized standards developed by the W3C (World Wide Web Consortium) that defines how to make web content accessible to people with disabilities. This includes visual, auditory, motor, and cognitive impairments.
It’s organized around four core principles, often called POUR:
Perceivable - Content must be presentable in ways users can perceive (alt text, captions, sufficient color contrast).
Operable - Interface must be navigable via keyboard, screen readers, and other input methods.
Understandable - Content and navigation should be clear, predictable, and readable.
Robust - Content must work reliably across different browsers, devices, and assistive technologies.
WCAG has three conformance levels: A (basic), AA (standard, and what most regulations like ADA and SEBI require), and AAA (highest). The current version is WCAG 2.2, with version 3.0 in development.
For teams building web or mobile apps, WCAG compliance isn’t just about avoiding legal risk. It directly impacts usability for a significant portion of your user base. The challenge is consistently validating compliance across browsers, devices, and assistive tools, which is where automated accessibility testing at scale becomes essential.