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PAC 2026 

PAC 2026 marks a new era in PDF checking: PAC 2026 expands existing checks to include AI-supported analyses that significantly reduce the amount of manual checking required. The AI automatically evaluates semantic structural elements such as headings, paragraphs, and tables, recognizing typical errors that previously could only be detected manually. 

This makes PAC 2026 the world's first verification tool that uses AI to evaluate the quality of PDF semantics! 
Download PAC 2026 (EXE, 123 MB)

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    Learn more about PAC 2026 and the AI-assisted checks here.

     

    PAC 2026 beta for administrative installations

    If you are a system administrator and want to deploy PAC 2026 on multiple computers, you can use this MSI file. Please refer to the technical documentation, especially for silent installations.
    Please note section 7.2 of our General Terms before distributing PAC within your network.

    Download PAC 2026.msi

    EULA

    By downloading and using PAC, you agree to our General Terms.

     

    Current version 

    27 November 2025: 26.0.0.0 – Release notes

     

    System requirements

    Supported operating systems

    • Windows 10
    • Windows 11

    Additional requirements

    Microsoft .NET Framework 4.8 and higher

    Accessibility Conformance Report (VPAT)

    The PAC user interface is mostly, but not completely, accessible. Read the Accessibility Conformance Report that we have commissioned.
    PAC Accessibility Conformance Report.pdf (PDF)

    PAC update notification

    You can register for our PAC update notification so that you are always informed immediately when there is a new version of PAC. Click on the button "PAC Update" below to start your subscription.

    PAC Update

    Earlier versions of PAC

    We generally recommend that you use the latest version of PAC. If you are unable to do this or would like to get to know previous versions of PAC, we have compiled the downloads for you here.

    PAC 2021

    Version 2021 supported testing according to WCAG 2.1 AA success criteria for the first time. In this context, a new color contrast check was implemented.

    Download (ZIP, 58 MB)

    PAC 3

    Version 3 included for the first time a printable summary report in the form of an accessible PDF which is often used as proof of quality.

    Download (ZIP, 27 MB)