Check a PDF for common structural accessibility signals directly in your browser without claiming legal or standards compliance.
Tagged PDF structure can describe headings, paragraphs, lists, tables, figures, and reading relationships. This checker reports only parser-exposed signals such as MarkInfo, page structure trees, language, title, searchable text, form tooltips, and bookmarks.
PDF.js inspects MarkInfo, metadata, outlines, standard form evidence, searchable text, and per-page structure trees sequentially in one managed session. Unknown signals remain unknown instead of being scored as passes.
No. Tag presence does not prove correct roles, reading order, alternative text, or semantic quality.
No. It reports supported structural evidence and is not a legal or standards-compliance certification.
Apply and verify OCR in a trusted tool, then manually review text accuracy, structure, and reading order.