PDF Accessibility Guides

Clear, practical guides to understanding and achieving PDF accessibility — from the PDF/UA standard to WCAG 2.1 AA and Section 508 compliance.

February 24, 20266 min read

What Are PDF Tags? The Structure Behind Accessible PDFs

Tags are the invisible structure tree that tells assistive technology what each element is and what order to read it in.

February 18, 20266 min read

What good alt text looks like, how to add it in Acrobat, and when an image should be marked decorative instead.

February 12, 20266 min read

Who Section 508 applies to, what it requires for PDFs, and a step-by-step checklist to get documents compliant.

February 3, 20268 min read

A focused look at the WCAG 2.1 Level A and AA success criteria that actually apply to PDF documents — and how to satisfy each.

January 22, 20267 min read

What PDF/UA actually requires, how it differs from WCAG, and what it takes to make a document conform to ISO 14289.

January 15, 20269 min read

Everything that goes into an accessible PDF — tags, alt text, reading order, headings, tables and metadata — and the fastest path to fixing each one.