Free PDF Accessibility Checker (PAC 2)

PDF Accessibility Checker (PAC 2)

Download now PAC (7/9/2014)

The freeware program PAC provides a fast way to test the accessibility of PDF files. PAC supports both experts as well as end users conducting accessibility evaluations.

 The Matterhorn Protocol (PDF) is designed to foster adoption of PDF/UA by providing a set of 31 checkpoints and 136 failure conditions that help software developers exchange detailed information on PDF/UA conformance and create software to make it easier for document authors to create fully accessible PDF files and forms.

PAC 2, the PDF Accessibility Checker from 'Access for All', a Swiss non-profit organisation, is the first implementation of the Matterhorn Protocol.

PAC ist recommended by the World Wide Web Consortium (W3C): PDF Techniques for WCAG 2.0

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Overview evaluation tools in PAC 2

Screenshot PDF Accessibility Checker

Technical check (1)

Click «Start» for automated error checking. View the summary report («Results»).

Detailed report (2)

Analyze the specific errors in the document based on the detailed report.

Preview (3)

Use the simplified structural view to quickly evaluate the quality of the document semantics and the reading order.

Document statistics (4)

Get an overview of the used structural elements.

Logical Structure - Expert view (5)

Inspect the entire document structure in its details. Different views allow to specifically inspect tags, their properties, role allocations and let you display their locations in the document.


Download new version PAC

Fixing PAC 2 issues with axesPDF QuickFix

With axesPDF QuickFix you can fix typical PDF/UA issues by clicking a single button - for example add PDF/UA identifier, mark non-relevant elements as artifacts, fix rolemapping issues or add link descriptions. It is also possible to correct typical accessibility issues of PDFs generated by Word or InDesign.


The company that developed PAC 2, xyMedia [German], is a member of the PDF/UA Competence Center, and contributed substantially to the development of the Matterhorn Protocol.

Additional information