PDF Accessibility Checker (PAC)

What it does

PAC is the free and globally used PDF Accessibility Checker and has proven itself since 2010 as the standard tool for checking PDF accessibility.

PAC 2026 is here – now with AI checks PAC 2026 expands existing tests with AI-assisted checks that significantly reduce the amount of manual testing required. PAC is funded by the German Federal Ministry of Labor and Social Affairs. Here you will find all the information you need about AI-supported checks in PAC 2026. Why PAC? PAC is the globally used, free PDF accessibility checking tool that has been tried and tested since 2010. PAC can check many PDF/UA and WCAG requirements at the touch of a button. In addition to this, PAC also supports the required visual check. Checks for PDF/UA and WCAG conformity PAC supports the two most widely recognized document accessibility standards in the…from pac.pdf-accessibility.org

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