Frequently Asked Questions
What is WCAG 2.1?
WCAG 2.1 (Web Content Accessibility Guidelines) is the technical standard for website accessibility published by the W3C. Level AA is the standard required for ADA compliance in the US. ADAWebPro scans against WCAG 2.1 AA.
What does WCAG 2.1 AA require?
WCAG 2.1 AA requires: alternative text on images, sufficient color contrast (4.5:1 ratio), keyboard navigation for all functions, labeled form fields, accessible video captions, and 40+ additional requirements across 4 principles.
What are the 4 WCAG principles?
WCAG is built on 4 principles: Perceivable (users can perceive content), Operable (users can operate interface), Understandable (users can understand content), Robust (content works with assistive technologies). All 4 must be met.
What is the difference between WCAG 2.0, 2.1, and 2.2?
WCAG 2.1 added 17 criteria to WCAG 2.0, focusing on mobile accessibility and cognitive disabilities. WCAG 2.2 added 9 more criteria. The current legal standard for ADA compliance in the US is WCAG 2.1 AA.
How do I check if my website meets WCAG 2.1 AA?
Run a free ADAWebPro scan at adawebpro.com. Get your violation count and WCAG 2.1 AA compliance status in 60 seconds. No signup required.
What is the most common WCAG 2.1 violation?
Missing image alt text (WCAG 1.1.1) is the most common violation — found on over 60% of websites. Second most common is insufficient color contrast (WCAG 1.4.3). Both are easily identified by a free ADAWebPro scan.
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