The instructions for creating accessible PDFs with Word, PowerPoint and InDesign from the TU Dresden refer, among other things, to the online tool PAVE for checking PDF documents for accessibility.

This is supposed to lead to an accessible PDF in four steps:

A short YouTube video (15’09”) demonstrates the functionality of PAVE 2.0:

PAVE (PDF Accessibility Validation Engine) has been developed by the ICT-Accessibility Lab of the Zurich University of Applied Sciences (ZHAW) in collaboration with the Swiss Federation of the Blind and Visually Impaired.