Skip to content
UXClaim
Accessibility

RGAA Accessibility Audit

13 Claude skills to audit web accessibility against RGAA v4.1.2 (WCAG 2.1 AA) on source code or live sites.

View source More in Accessibility

What It Does

RGAA Accessibility Audit automates compliance checking against the French RGAA v4.1.2 standard (equivalent to WCAG 2.1 Level AA). The toolkit includes 13 specialized skills covering 106 accessibility criteria across themes like images, forms, colors, multimedia, navigation, and more.

How It Works

These skills work in two contexts:

  • Claude Code: Upload skills and analyze your source code directly. Claude extracts relevant elements, calculates contrast ratios, verifies ARIA attributes, validates heading hierarchies, and flags non-conformities.
  • Claude in Chrome: Install skills and audit live websites. Claude inspects the rendered DOM in real-time to detect accessibility issues.

The skills clearly distinguish between fully automatable checks (missing alt text, insufficient contrast, absent labels) and items requiring human judgment (alternative text quality, content organization).

Use Cases

  • Audit existing websites before launch or redesign
  • Validate compliance during development
  • Generate structured audit reports with remediation priorities
  • Test specific accessibility themes (forms, images, navigation)
  • Compare issues across multiple pages systematically

Who Benefits

UX designers, product managers, accessibility specialists, QA testers, and developers needing to meet WCAG 2.1 AA compliance. The toolkit is especially valuable for public sector organizations and large enterprises where RGAA compliance is legally mandatory.

Frequently asked questions

How do I install RGAA accessibility audit skills?
Download the 13 skill files from the repository. For Claude Code, use your local Claude installation to import them. For Claude in Chrome, go to Settings → Skills and upload the .skill files. Full instructions are in the tutorial documentation.
What's the difference between RGAA and WCAG?
RGAA (French standard) is based on WCAG 2.1 Level AA and the European EN 301 549 standard. It's legally mandatory in France for public organizations and large private companies. These skills audit against RGAA v4.1.2, which aligns with WCAG 2.1 AA accessibility guidelines.
Can these skills replace a full accessibility audit?
No. Automated tools detect 30-40% of accessibility issues. These skills excel at catching technical problems (missing attributes, contrast failures, invalid HTML). They should be complemented by manual testing with screen readers (NVDA, JAWS, VoiceOver), keyboard navigation testing, and ideally user testing with people who have disabilities.
How many criteria does RGAA cover?
RGAA v4.1.2 includes 106 criteria organized across 13 themes: Images (9), Frames (2), Colors (3), Multimedia (13), Tables (8), Links (2), Scripts (5), Mandatory Elements (10), Structure (4), Presentation (14), Forms (13), Navigation (11), and Consultation (12).
Can I audit multiple pages at once?
Yes. With Claude Code, you can batch-test entire directories of HTML files. With Claude in Chrome, you'll need to audit pages individually but can compile results across multiple URLs. The skills generate structured reports that are easy to aggregate.
What's the difference between Claude Code and Chrome extension?
Claude Code works on source files (HTML, CSS, JavaScript) in your codebase. Claude in Chrome inspects rendered pages in real-time, seeing actual computed styles, JavaScript-rendered DOM, and visual appearance. Use Code for development, Chrome for testing live sites or JavaScript-heavy applications.
How detailed are the audit reports?
Reports include pass/fail/warning status for each criterion, specific elements that fail (with line references), contrast ratios, ARIA validity, heading hierarchy issues, and actionable remediation recommendations. They're structured for both quick scanning and detailed review.
Do these skills generate remediation code?
When using Claude Code, Claude can analyze failures and suggest fixes with code corrections. For example, it can add missing ARIA labels, fix heading hierarchy, or correct contrast issues. The Chrome extension focuses on reporting and diagnosis rather than code generation.

Glossary

RGAA
Référentiel Général d'Amélioration de l'Accessibilité (French General Accessibility Improvement Repository). The official French accessibility standard based on WCAG 2.1 Level AA, legally mandatory for French public sector and large organizations.
WCAG 2.1
Web Content Accessibility Guidelines version 2.1 published by W3C. Provides standards for making web content accessible to people with disabilities. Level AA is the intermediate compliance level.
ARIA
Accessible Rich Internet Applications. W3C specification for adding semantic information to HTML elements using roles, states, and properties to improve accessibility for assistive technologies like screen readers.
Contrast ratio
The relative luminance difference between two colors, measured on a scale of 1:1 to 21:1. WCAG requires 4.5:1 for text and 3:1 for UI components at AA level to ensure readability.
Accessibility audit
Systematic evaluation of a website or application against accessibility standards to identify compliance issues, prioritize remediation, and document conformance for legal or quality assurance purposes.

More in Accessibility

All →
Accessibility

A&T Claude Skills

Reusable Claude Code skills for accessibility audits, WCAG compliance checking, and web development workflows

automateandtweak
Accessibility

a11y-skills

Claude Skills for accessibility auditing, code review, and WCAG 2.2 compliance across web, mobile, and documents.

joedevon