Free PDF/UA checker
The PDF Accessibility Checker (PAC) 3 is a freeware of the Swiss foundation "Access for all" for PDF accessibility testing.
The features:
- a PDF/UA-check with all machine-testable checkpoints of the matterhorn protocol
- a screenreader preview for evaluating the logical document structure visually
- a view of the tag tree with all properties and attributes
- statistics concerning the document structure
With PAC 3 - the worldwide first ISO 14289-1 (PDF/UA) validator - it is possible to evaluate the PDF/UA compliance of your accessible PDFs.
Download PAC 3
Download the newest version (only for Windows):
https://www.access-for-all.ch/en/pdf-accessibility-checker.html
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