ACCESSIBILITY

The Essential Guide to PDF/UA Compliance for WCAG

January 10, 2025 • 15 min read • Accessibility

PDF/UA (ISO 14289) is the international standard for accessible PDF documents. It ensures PDFs are usable by people with disabilities, particularly those using screen readers.

Why PDF/UA Matters

  • Legal requirement: Many countries require accessible documents
  • WCAG compliance: PDF/UA aligns with Web Content Accessibility Guidelines
  • Inclusivity: Makes content available to all users
  • Better UX: Well-structured documents benefit everyone

PDF/UA Requirements Checklist

WCAG 2.1 Requirements for PDFs

Success Criterion 1.1.1: Non-text Content

All images, charts, and graphics must have text alternatives.

How to check: Use Adobe Acrobat's accessibility checker or our free accessibility validator.

Success Criterion 1.3.1: Info and Relationships

Information, structure, and relationships must be programmatically determinable.

Implementation: Use proper heading tags (H1, H2, etc.), lists, and tables with headers.

How to Test PDF Accessibility

  1. Automated testing: Use tools like PAC, Adobe Accessibility Checker
  2. Manual testing: Navigate with keyboard only
  3. Screen reader testing: Test with NVDA, JAWS, or VoiceOver
  4. Color contrast: Ensure sufficient contrast ratios

Common PDF Accessibility Issues

  • Scanned documents: Not searchable, need OCR
  • Missing alt text: Images without descriptions
  • Incorrect reading order: Created from PowerPoint slides
  • Form fields: Not properly labeled
  • Tables: Missing header cells

Free Accessibility Tools

You don't need expensive software to start:

  • PDF Accessibility Checker (PAC): Free tool from Access for All
  • NVDA: Free screen reader for testing
  • axe PDF: Open-source accessibility checker
  • Our tools: Free accessibility checker

Quick Accessibility Fix with Our Tool

Try our free PDF accessibility checker to identify issues:

Creating Accessible PDFs from Source

Best practice: Fix accessibility at the source, not in the PDF.

Microsoft Word to PDF:

  1. Use built-in heading styles (Heading 1, Heading 2)
  2. Add alt text to images
  3. Create accessible tables with header rows
  4. Set document language
  5. Export using "Best for electronic distribution"

Web Page to PDF:

  • Ensure source HTML is accessible
  • Use @media print CSS for better printing
  • Avoid using browser "Print to PDF" for accessibility

Conclusion

PDF/UA compliance is essential for inclusive document sharing. While tools can help identify issues, the best approach is creating accessible source documents and validating final PDFs.

Remember: Accessibility is an ongoing process, not a one-time check.