PDF Validation
Test, Fix & Verify PDF Accessibility (PDF/UA & WCAG)
PDF Validation ensures your documents meet accessibility and compliance standards – making PDFs readable, navigable, and inclusive for everyone.
Free PDF Accessibility Checker
Validate PDF Accessibility with PDFix
PDFix Desktop Lite is your free PDF accessibility checker for verifying PDF/UA conformance. This powerful desktop app validates PDFs, analyzes accessibility errors, and generates detailed validation reports with step-by-step resolution suggestions.
Key Features
- Powered by VeraPDF, the industry-standard open-source validator
- Follows the Matterhorn Protocol for PDF/UA accuracy
- Generates clear validation reports (HTML, XML, or JSON)
- Shows detailed accessibility errors and quick navigation
- Converts to HTML for reading-order verification
- The only PDF accessibility validator for macOS
- Compatible with PAC, Adobe Acrobat
💡 Why PDF Validation Matters
Accessible PDFs are essential for:
- Legal compliance (PDF/UA, WCAG 2.2)
- Inclusive access for all users
- Accurate tagging and structure
- Improved usability across assistive tech
- Reduced remediation costs
Goal: Not just “pass every check” – but create genuinely accessible PDFs that work for everyone.
PDF Accessibility Validation and Compliance Guide
Explore how leading PDF/UA-1 accessibility checkers analyze and report compliance issues to help you achieve PDF/UA and WCAG accessibility standards.
- Compare veraPDF, PAC, Adobe Preflight, and CommonLook Validator side by side
- See how each tool identifies different PDF accessibility errors
- Understand why validation results may vary between checkers
- Learn how to interpret validator reports with clarity and confidence
💡TIP: Combine multiple validators for the most accurate and reliable PDF validation.
👉 Learn more in our blog post on PDF/UA-1 Accessibility Validator Comparison
New In: Advanced PDF/UA Validation with VeraPDF Docker
Easily integrate automated PDF/UA validation directly into your high-volume PDF workflows using the VeraPDF Validation Docker Image 🐳 and GitHub Action for PDF Validation. These tools let you automatically generate HTML, XML, or JSON accessibility reports, streamlining compliance across every PDF in your production pipeline.
Webinar: Checking PDF Accessibility with PDFix
Watch our Free Webinar on PDF Validation and learn how to check PDF accessibility with PDFix.
Learn How to Check PDF for Accessibility with PDFix Desktop Lite
Frequently Asked Questions
How can I check if my PDF is accessible?
You can use PDFix Desktop Lite, a free accessibility checker powered by veraPDF, to analyze your document. It validates structure, tagging, and reading order, and generates a detailed report showing any accessibility issues and how to fix them.
What are the best tools to validate PDF/UA compliance?
The most reliable PDF/UA validators include veraPDF, PAC (PDF Accessibility Checker), Adobe Preflight, and CommonLook Validator.
For the best results, use multiple tools together, since each validator may detect different issues or interpret rules slightly differently.
Is there a free PDF/UA accessibility checker for macOS?
Yes — PDFix Desktop Lite is the only free PDF accessibility validator available for macOS. It provides full PDF/UA validation, HTML preview, and detailed accessibility reports.
Where can I learn more about PDF accessibility validation?
Check out our in-depth blog post PDF/UA-1 Accessibility Validator Comparison to see how different tools analyze the same PDF and how to interpret results effectively.
What is the Matterhorn Protocol in PDF validation?
The Matterhorn Protocol defines a detailed list of technical checks required for PDF/UA compliance. It helps validators, like PDFix and veraPDF, perform consistent accessibility testing and report precise errors across all documents.
For Windows, Linux and macOS
Desktop Lite
Free PDF Viewer and PDF Accessibility Checker with built-in industry supported VeraPDF Validator.
Desktop Pro
All-in-one tool for automated PDF accessibility, ensuring PDF/UA and WCAG compliance with customizable remediation workflows.
SDK
AI-powered SDK for PDF accessibility, conversion & data extraction seamlessly integrating into any workflow.
Disclaimer: PDFix provides tools and technology to assist in making your documents accessible, but we do not guarantee 100% document accessibility. Achieving full compliance requires human checks and intervention. Please note that PDFix is a technology provider, not a service provider. The responsibility for document compliance rests with the user.
