PDF Accessibility

The practice of creating PDF documents that can be effectively used by people with disabilities, including those who use screen readers, keyboard navigation, magnification, or other assistive technologies. Accessible PDFs require proper document structure (tag trees with semantic markup), logical reading order, alternative text for images, accessible table structures with header associations, functional hyperlinks, sufficient colour contrast, readable fonts with proper embedding, and document metadata including language specification and meaningful titles. Despite established standards like WCAG 2.2 and PDF/UA (ISO 14289-1), PDF accessibility remains a significant challenge — research shows less than 3.2% of scholarly PDFs meet key accessibility criteria, creating substantial barriers for blind and low-vision readers in academic and professional contexts.