PDF Validation

Accurately Test Your PDFs for Accessibility


Unlock Free PDF Validation

Discover PDFix’s free PDF Accessibility Checker, ensuring your files meet accessibility standards effortlessly. Quickly assess PDFs for compliance with PDF/UA standards, identifying and explaining accessibility issues while offering actionable suggestions for resolution.

PDFix also facilitates conversion from Tagged PDF to HTML. This feature enables you to quickly display results, review document structure, and verify reading order for enhanced accessibility.

Introducing Our Free PDF Accessibility Checker

PDFix Desktop Lite provides an automated way to easily check the accessibility of your PDF files. It’s powered by the industry-supported veraPDF validation engine, which is a component of the Open Preservation Foundation’s reference toolset.

  • Support for PDF/UA-1 (machine) validation leveraging the Matterhorn Protocol
  • Compatible with PAC, Adobe Acrobat
  • Quick navigation to errors in Tags, Content, or Annotations panes
  • Conversion to HTML for visually evaluating the logical structure and reading order
  • Well-organized summary of the results

Deriving HTML from PDF

Transform tagged documents into HTML files that meet compliance standards, leveraging the Deriving HTML from PDF specification.

  • Simplify accessibility of PDF through HTML
  • Reuse PDF content on mobile devices
  • Access information contained in PDF documents over the visual representation
  • Render authored PDFs into HTML
  • Derive PDF content into HTML for automated processing

How to Check PDF for Accessibility?

Ensure your PDF’s compliance with accessibility standards using PDFix Desktop Lite. Validate your tagged PDFs effortlessly, with errors highlighted and navigated to directly within the document. The Content Panel conveniently pinpoints errors for quick resolution.

Save time and explore our PDFix Desktop video tutorial or visit our blog for a wealth of insightful posts on PDF validation!

PDFix Desktop Tutorial: How to check if a PDF is valid for Accessibility. Click to load the Embed YouTube Player to play the video.

For Windows, Linux and macOS

PDFix Desktop Lite Icon in the gray color, which illustrates the "Lite" features.

Desktop Lite

PDFix Desktop Lite is a multiplatform PDF viewer with a built-in accessibility tool.

PDFix Desktop Pro Icon in blue color, which illustrates powerful PDF features built on the PDFix SDK

Desktop Pro

PDFix Desktop is a complex solution for PDF Accessibility, PDF Conversion and Data Extraction designed for professionals and businesses of all sizes.

PDFix SDK Icon in the green color


PDFix SDK is a cross-platform solution to Automatically Extract Structured Data from any PDF.

Have a question or are you missing something? Let us know and we’ll get back to you. Send us a message or select the time to talk to us, and we’ll get back to you.