PURPOSE Accessible PDFs preserve structure and meaning for readers using assistive technology. START WITH THE SOURCE Create an accessible source document first, using proper headings, lists, alt text, and readable formatting. EXPORT CAREFULLY Use an export method that preserves tags, links, bookmarks, and reading order when available. CHECK Review reading order, headings, tables, links, images, and form fields. BEST PRACTICE A scanned image-only PDF is usually not accessible unless text recognition and tagging are added.