PDF Association logo

Discover pdfa.org

Key resources

Get involved

How do you find the right PDF technology vendor?
Use the Solution Agent to ask the entire PDF communuity!
The PDF Association celebrates its members’ public statements
of support
for ISO-standardized PDF technology.

Member Area

New PDF Accessibility Checker by Dual Lab

Dual Lab is glad to announce a new PDF Accessibility Checker available immediately for tests and download.

December 22, 2025
PDF4WCAG logo
New PDF Accessibility Checker by Dual Lab
PDF4WCAG logo

Dual Lab is glad to announce a new PDF Accessibility Checker available immediately for tests and download.

December 22, 2025

New PDF Accessibility Checker by Dual Lab

About Dual Lab sprl

Dual Lab is glad to announce a new PDF Accessibility Checker available immediately for tests and download at  PDF4WCAG.

Our new product PDF4WCAG Accessibility Checker helps quickly and easily validate the accessibility of  PDF documents according to WCAGPDF/UA-1PDF/UA-2 and Well-Tagged PDF requirements.

It is powered by the veraPDF validation architecture and is identical to veraPDF in Machine verifiable checks of PDF/UA-1, PDF/UA-2 and Well-Tagged PDF profiles.

Additionally, it includes experimental AI-based heuristics to validate appropriate use of the PDF semantics.

PDF4WCAG Accessibility Checker is free for non-commercial use and is supported by Dual Lab.

Read more.


Dual Lab provides top quality product development services in graphics arts and other technology-intensive areas. This includes processing of virtually any known file format in computer graphics, PDF/Postscript generation, conversion and editing, deep knowledge of font technologies and typography challenges, expertise in web2print and XML publishing solutions, plug-in development for…

Read more

WordPress Cookie Notice by Real Cookie Banner