Accessibility Knowledge Hub

508 compliance requirements for websites: who Section 508 binds, the Revised 508 Standards, WCAG 2.0 Level A and AA, the exceptions, and how it differs from the ADA.

508 compliance testing from federal sources: the ICT Testing Baseline, DHS Trusted Tester, the free tools, the ACR an agency reviews, and what 508 certification covers.

Ten free accessibility testing tools sorted by the job each does, where W3C's automated test rules reach in WCAG 2.2, and the checks that still need a person.

What accessibility remediation is, how to split an audit report into code, document and media queues, what to fix first, and what record closes each finding.

Accessible UI components, from modal dialogs to checkout forms: the WCAG 2.2 success criteria each one must pass, the failures W3C documents, and a one-minute check.

Accessible content under WCAG, criterion by criterion: headings, plain language, links, alt text, media, contrast, color, fonts, spacing, forms and email, with tests.

Video accessibility under WCAG 2.1 AA is checked in the media, the player and the page. What to test for each criterion, a failure measured on a live page, and how Title II applies.

WCAG 2.2 AA adds six success criteria to 2.1 and drops 4.1.1. Washington requires it now and New York agencies by 2027, while federal rules still name 2.0 and 2.1.

WCAG is the set of web accessibility guidelines US rules point to. How it is built, which version and level apply to you, and what the most common failures look like.

An ADA compliance checker measures part of WCAG and flags some of the rest for a person. What its score means, and how to work through the report it gives you.

Section 508 Chapter 6 covers documentation and support services, and 602.2 asks you to write something rather than only format it. What is in scope.

No rule requires a vendor to produce a VPAT. Four rulebooks require your buyer to ask. Who is asking, which edition they need, and what to send.