Accessibility Check

Accessibility Check

Scan any web page for WCAG accessibility violations. No signup required.

Prerequisites

• Playwright MCP (comes with Claude Code)

Trigger

• "Check accessibility on https://..."
• "WCAG scan this page"
• "Is my site accessible?"

Workflow

1. Navigate to the URL using mcp__playwright__browser_navigate
2. Take a snapshot with mcp__playwright__browser_snapshot
3. Check each of these categories:

Checks

Images & Media

• Every img must have alt attribute
• Decorative images should have alt=""
• video and audio should have captions/transcripts

Headings

• Page should have exactly one h1
• Headings should not skip levels (h1 → h3 without h2)
• Headings should be descriptive, not empty

Forms

• Every input must have a visible label or aria-label
• Required fields should be marked
• Error messages should be associated with fields

Keyboard

• All interactive elements should be focusable
• Tab order should be logical
• No keyboard traps (can tab in and out of everything)
• Focus indicator must be visible

Color & Contrast

• Text should have 4.5:1 contrast ratio (AA)
• Large text (18px+) needs 3:1 minimum
• Information should not rely on color alone

ARIA

• Interactive elements should have accessible names
• role attributes should be valid
• aria-hidden="true" should not hide focusable elements

Structure

• Page should have landmark regions (main, nav, header, footer)
• Links should have descriptive text (not "click here")
• Language attribute on <html>

4. Grade the page: A (0-1 issues), B (2-4), C (5-8), D (9-12), F (13+)

5. Output:

## Accessibility Report: [URL]

**Grade: B** (3 issues found)

### Issues
1. [CRITICAL] 2 images missing alt text
   - img at hero section (src: banner.jpg)
   - img in footer (src: logo.png)

2. [WARNING] Heading hierarchy skips h2
   - h1 "Welcome" → h3 "Features" (missing h2)

3. [WARNING] 1 form input without label
   - Search input in header has placeholder but no label

### Passed
- Color contrast: OK
- Keyboard navigation: OK
- ARIA landmarks: OK
- Language attribute: OK

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