7 tools
PDF Accessibility
Check the structure assistive technology depends on.
A PDF that looks fine can be unusable with a screen reader, because assistive technology does not read the visual page — it reads the tag tree underneath. If that tree is missing, the reader falls back to guessing order from raw content streams. These tools inspect the structures that actually matter: tags, heading nesting, image alt text, document language and title. They report findings honestly; they are not a substitute for formal certification.
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Most used in PDF accessibility
Every other tool in this group
PDF Tag Inspector
See the structure tree that assistive technology actually reads.
PDF Heading Structure Checker
Check the heading outline a screen reader uses to navigate the document.
PDF Reading Order Checker
See the sequence your document is actually announced in, not the one it looks like.
PDF Alt Text Checker
Find the images a screen reader has nothing to say about.
PDF Language Checker
Check the language and title declarations that control pronunciation.
PDF/UA Compliance Checker
Check the PDF/UA requirements a program can actually verify.
About PDF accessibility
Is this a certified PDF/UA conformance check?
No. It inspects specific machine-checkable requirements and reports what it finds. Full PDF/UA conformance includes human judgement — whether alt text is meaningful, for instance — that no automated tool can assess.
Can this tool fix accessibility problems automatically?
No. These accessibility tools inspect the document and export their findings as JSON; they do not change its language, title or tags, or produce a repaired PDF. Correct the findings in the original authoring application or a suitable accessibility remediation tool, then check the new PDF again. A correct tag tree, meaningful alternative text and a sensible reading order require understanding the intended document structure, so automated findings still need human review.