WCAG & ADA Compliance Checker
Test any URL against 20 WCAG 2.1 success criteria used to evaluate ADA compliance. Get a pass/fail breakdown per criterion, grouped by Perceivable, Operable, Understandable, and Robust.
Note: This tool analyses server-rendered HTML. Content loaded via JavaScript (React hydration, SPAs) may not be included. For full JS-rendered audits, use browser tools like Lighthouse or axe DevTools.
20 Success Criteria Checked
| SC | Name | Level | Principle |
|---|---|---|---|
| 1.1.1 | Non-text Content | A | Perceivable |
| 1.3.1 | Info and Relationships | A | Perceivable |
| 1.3.4 | Orientation | AA | Perceivable |
| 1.4.3 | Contrast (Minimum) | AA | Perceivable |
| 1.4.4 | Resize Text | AA | Perceivable |
| 1.4.11 | Non-text Contrast | AA | Perceivable |
| 2.1.1 | Keyboard | A | Operable |
| 2.4.2 | Page Titled | A | Operable |
| 2.4.3 | Focus Order | A | Operable |
| 2.4.4 | Link Purpose (In Context) | A | Operable |
| 2.4.5 | Multiple Ways | AA | Operable |
| 2.4.6 | Headings and Labels | AA | Operable |
| 2.4.7 | Focus Visible | AA | Operable |
| 3.1.1 | Language of Page | A | Understandable |
| 3.1.2 | Language of Parts | AA | Understandable |
| 3.3.1 | Error Identification | A | Understandable |
| 3.3.2 | Labels or Instructions | A | Understandable |
| 4.1.1 | Parsing | A | Robust |
| 4.1.2 | Name, Role, Value | A | Robust |
| 4.1.3 | Status Messages | AA | Robust |
Frequently Asked Questions
Common questions about WCAG and ADA compliance checking, success criteria, and how the per-criterion audit works.
Why check WCAG compliance per criterion for ADA?
A single accessibility score can obscure which specific WCAG requirements your site meets and which it misses. Per-criterion reporting gives you the same view an ADA compliance auditor uses. You can see exactly which success criteria pass and which need work, making it easier to prioritize fixes and document your compliance efforts.
The four POUR principles (Perceivable, Operable, Understandable, Robust) organize criteria by the type of barrier they address. This makes it easier to prioritize: a page missing a lang attribute is a different kind of issue than a page with low color contrast ratios. Both matter for WCAG and ADA compliance, but they require different fixes.
This WCAG compliance checker covers 20 criteria that can be evaluated from server-rendered HTML. For a full ADA compliance audit, combine it with our website accessibility checker, manual keyboard testing, screen reader testing, and browser-based tools like axe DevTools.
Ship WCAG-compliant UIs faster
Our starter kits pass every criterion checked here out of the box. Contrast-checked, keyboard-tested, screen-reader verified.
Browse Starter Kits