Well-tagged PDF checker
Check the tag signals that make a PDF navigable for screen readers: headings, lists, tables, figures, links, and language.
- Finds missing tag-tree, marked-content, heading, list, table, and figure signals
- Flags image-only scans and missing text layer
- Calls out reading-order and alt-text quality as human-review items
- Runs locally with no PDF upload
How to well-tagged pdf checker
- Drop in a PDF.
- Check whether it has the structural tags a screen reader depends on.
- Use the report to fix source files or repair the PDF tag tree.
Frequently asked questions
What does well-tagged mean?
A well-tagged PDF has a logical structure tree, real text, document language and title, headings, lists, table semantics, figure alt text, links, and a reading order that matches the visual meaning.
Can a tagged PDF still be inaccessible?
Yes. Tags can be present but semantically wrong. This checker flags syntax signals and marks semantic checks that still need human review.
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