PDF Heading Structure Audit
Walk a tagged PDF's structure tree, list every heading (H1–H6) in document order, and flag broken hierarchy (skipped levels, multiple H1s, missing H1).
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How does the PDF Heading Structure Audit work?
Walk a tagged PDF's structure tree (/StructTreeRoot → /K) and produce a Markdown report of every heading (H1–H6) in document order, plus issues against WCAG 2.2 SC 1.3.1 (Info and Relationships) and PDF/UA-1 §7.1 (Headings). Issues flagged: no H1, multiple H1s, first heading not at H1, skipped levels (e.g. H2 → H4). Useful before publishing accessibility-mandated documents (government, education, healthcare) — gives you a deterministic check the structure tree itself supports the implied outline.
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Frequently asked
For heavier PDF workflows
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