Technical Notes, best-practice guides, test suites, educational videos and more

The PDF Association publishes a variety of documents and other resources to help developers, product managers, and others interested in leveraging PDF to meet their business and organizational objectives.

Most publications listed on pdfa.org are developed through our publications process, and are freely available to members and non-members alike.

PDF Association members may access drafts of current and upcoming ISO standards via the members-only intranet.


The Matterhorn Protocol 1.1


The Matterhorn Protocol, a free publication, identifies all possible ways to fail PDF/UA-1.

Matterhorn Protocol 1.1 cover page



Stressful PDF Corpus

Understanding the problems faced by diverse parsers can be a great learning experience. The “Issue Tracker” corpus of stressful PDF files was originally developed under the DARPA-funded “SafeDocs” program.

Bell cure of PDF complexity.

PDF/UA Reference Suite 1.1

The PDF/UA Reference Suite is a resource for software developers and practitioners interested in best-practices for creating tagged and accessible PDF files

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veraPDF Test Suite

veraPDF is the industry-supported open-source validator for PDF/A-1, PDF.A-2 and PDF/A-3. The software was developed under the supervision of the PDF Association’s PDF Validation Technical Working Group. As of 2021 the PDF/A TWG continues to set policy for the test …

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Cal Poly Graphic Communications PDF/VT Test File Suite –1.0.1

The Cal Poly Graphic Communications PDF/VT Test File Suite provides a collection of four sets of graphically-rich, robust, valid PDF/VT files for testing and demonstrating products claiming support of consumption of files conforming to the ISO 16612-2 PDF/VT standard. The PDF Association …

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Isartor Test Suite

The Isartor Test Suite is named after the location of the first meeting of the Technical Working Group, a medieval gate towards the river Isar in the center of Munich/Germany. This test suite comprises a set of files which can …

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