What is the difference between Section 508 and WCAG 2.1?

Section 508 is a U.S. federal law requiring accessibility for electronic and information technology in government agencies. It aligns closely with WCAG 2.0 Level A and AA. WCAG 2.1 is a global standard with broader guidelines for digital content, including PDFs. Most public organizations aim for WCAG 2.1 Level AA for full compliance.

Can I use free tools to check PDF accessibility?

Yes! Tools like PDFKro’s AI PDF Editor (/ai-edit), Adobe Acrobat’s built-in checker, and PAC (PDF Accessibility Checker) are great free options to scan for basic issues like missing alt text or improper heading structures. For deeper remediation, paid tools like Adobe Acrobat Pro or CommonLook PDF may be needed.

What happens if a public organization’s PDFs aren’t accessible?

Non-compliant PDFs can lead to legal risks under laws like the ADA or Section 508. The U.S. Department of Justice has increased enforcement, and private lawsuits targeting inaccessible digital content are rising. Beyond legal trouble, inaccessible PDFs exclude citizens who rely on assistive tech.

How do I add alt text to images in a PDF?

To add alt text, open the PDF in a tool like Adobe Acrobat Pro or PDFKro’s AI PDF Editor (/ai-edit). Select the image, right-click, and choose ‘Edit Alt Text.’ Write a concise, descriptive phrase that explains the image’s purpose. Avoid phrases like ‘image of’—just describe the content directly.

Do scanned PDFs need special handling for accessibility?

Yes! Scanned PDFs are essentially images of text, so screen readers can’t interpret them. First, OCR (optical character recognition) the file to make it searchable and editable. Use PDFKro’s PDF to Word tool to convert scanned PDFs into accessible, text-based files before remediation.

PDF Accessibility Guide for Public Orgs

Let’s face it: if your public organization is still churning out PDFs that look pretty but aren’t accessible, you’re leaving people behind. That’s not just bad policy—it’s often against the law. The good news? Fixing it isn’t as complicated as it seems. This guide walks you through the basics of PDF accessibility and compliance, so you can make sure your documents are inclusive, legally sound, and easy to use.

Why does this matter? Because millions of people rely on screen readers, keyboard navigation, or other assistive tech to access digital content. If your PDFs aren’t built with accessibility in mind, they’re effectively invisible to those users. And in the public sector, that’s a non-starter.

What Exactly Are PDF Accessibility Standards?

So, what do you actually need to follow? The two biggest frameworks are:

Section 508 (U.S.): Requires federal agencies to make their electronic and information technology accessible to people with disabilities. It aligns with WCAG 2.0 Level A and AA.
WCAG 2.1 (Global): The Web Content Accessibility Guidelines are the gold standard for digital accessibility worldwide. They’re structured around four principles: Perceivable, Operable, Understandable, Robust (POUR).

For public organizations, WCAG 2.1 Level AA is the sweet spot. It’s rigorous but achievable, and it covers everything from color contrast to keyboard navigation. If you’re unsure where to start, aim for WCAG 2.1 AA—it’s the benchmark most legal cases and government policies reference.

Not sure if your PDFs meet the mark? Use PDFKro’s AI PDF Editor (/ai-edit) to scan your documents for basic accessibility gaps like missing alt text or improper heading structures. It’s a quick way to spot issues before they become compliance headaches.

Key WCAG 2.1 Requirements for PDFs

Here’s what WCAG 2.1 demands for PDFs:

Text Alternatives (1.1.1): Every image, graph, or non-text element needs a descriptive alt text. No exceptions.
Info and Relationships (1.3.1): Headings, lists, and tables must be properly tagged so screen readers can interpret them correctly. Think of it like giving a map to a tourist—they can’t navigate without it.
Meaningful Sequence (1.3.2): The reading order should match the visual flow. If your PDF’s structure is a mess, a screen reader will read it like a garbled radio signal.
Keyboard Accessible (2.1.1): Users should be able to navigate and interact with the PDF using only a keyboard. If you can’t tab through a form without a mouse, it fails this test.
Color Contrast (1.4.3): Text and background colors need enough contrast to be readable by someone with low vision. Tools like WebAIM’s Contrast Checker can help verify this.
No Timing (2.2.1): Don’t auto-refresh content or force time limits. People with cognitive disabilities need time to process information.

Miss any of these? Your PDF is at risk of being non-compliant. The good news is that fixing them is often just a matter of tagging, alt text, and testing.

How to Audit Your PDFs for Accessibility

Before you can fix issues, you need to find them. Here’s a no-BS audit process:

A Quick Check: Open your PDF in Adobe Acrobat Pro (if you have it) and run the built-in accessibility checker. It’ll flag errors like missing tags, alt text, or color contrast problems. No Acrobat? No problem—PDFKro’s AI PDF Editor offers a free, lightweight alternative to scan for basic issues.

Next, test with a screen reader. Try this now: Download a free screen reader like NVDA (Windows) or VoiceOver (Mac) and open one of your PDFs. Can you navigate it logically? Are images described? If not, you’ve got work to do.

Finally, test keyboard navigation. Disable your mouse and try to interact with the PDF. Can you fill out forms? Click links? If you hit a dead end, your PDF needs remediation.

Pro tip: If you’re juggling tons of PDFs, consider using PDFKro’s AI PDF Chatbot (/ai-rag) to batch-review documents for accessibility tags. It won’t replace a full audit, but it’s a great first step to spot patterns (e.g., “90% of our PDFs are missing alt text on images”).

Common Pitfalls and How to Avoid Them

Even well-meaning teams trip up on accessibility. Here’s what to watch for:

Scanned PDFs: If your PDF is just an image of a document (e.g., a fax or old report), it’s essentially a blank slate to a screen reader. Always OCR (optical character recognition) the file first. PDFKro’s PDF to Word tool can convert scanned PDFs into editable, searchable text.
Complex layouts: Multi-column designs, tables without headers, or decorative elements can confuse screen readers. Keep it simple, and use proper tags to define structure.
Missing document title: Screen readers announce the document title first. If it’s untitled or says “Document,” users have no context. Set a clear, descriptive title in the PDF properties.
Language tags: If your PDF includes multiple languages, mark the language in the document properties. Otherwise, screen readers might mispronounce text.

Another sneaky issue? PDFs created from Word or Google Docs often inherit accessibility problems from the source file. Always check the original document before exporting to PDF. If you’re starting from scratch, convert your Word doc to PDF using PDFKro to ensure formatting stays intact.

Tools and Resources to Simplify Compliance

You don’t have to do this alone. Here are some tools to make accessibility a breeze:

PDF Accessibility Checker (PAC): A free tool that checks WCAG and PDF/UA compliance. It’s like a spell-checker for accessibility.
Adobe Acrobat Pro: The industry standard for PDF remediation. If you’re serious about compliance, this is worth the investment.
CommonLook PDF: A powerful (but pricier) tool for bulk remediation and reporting.
PDFKro’s AI PDF Editor (/ai-edit): A free, lightweight way to scan and fix basic accessibility issues like alt text, heading levels, and reading order. No software downloads needed.
Screen readers: Test with NVDA (Windows) or VoiceOver (Mac) to catch real-world issues.

For public organizations drowning in paperwork, PDFKro’s Merge PDF tool can also help consolidate multiple accessible PDFs into a single, compliant document. No more juggling files or losing track of updates.

What Happens If You Ignore Accessibility?

Here’s the hard truth: non-compliant PDFs can lead to legal trouble. The U.S. Department of Justice has ramped up enforcement of ADA violations, and private lawsuits are on the rise. In 2023, over 3,000 ADA web accessibility lawsuits were filed—many targeting PDFs on government websites.

Beyond legal risks, inaccessible PDFs shut out citizens who rely on assistive tech. That’s a disservice to the public you serve. The fix isn’t just about avoiding fines; it’s about equity. Every PDF should be as inclusive as your office’s wheelchair ramps.

Your 5-Step Accessibility Action Plan

Ready to get started? Here’s a practical roadmap:

Inventory your PDFs: List all PDFs on your website or shared drives. Prioritize high-traffic or critical documents (e.g., forms, reports, announcements).
Run an initial scan: Use PDFKro’s AI PDF Editor or Adobe’s accessibility checker to identify quick wins (e.g., missing alt text).
Fix the low-hanging fruit: Add alt text to images, correct heading structures, and ensure proper reading order. Small changes make a big difference.
Test with assistive tech: Use a screen reader and keyboard navigation to verify fixes. If it’s clunky for you, it’s clunky for everyone else.
Document your process: Keep records of your accessibility efforts. This shows due diligence if you’re ever audited.

Pro tip: If you’re short on time, start with your most visited PDFs. A single high-traffic document—like a tax form or city council agenda—is a great place to begin.

PDFKro: Your Secret Weapon for Compliance

Let’s be real: accessibility work can feel overwhelming, especially when you’re balancing it with day-to-day operations. That’s where PDFKro comes in. Our free tools are designed to help public organizations tackle PDF accessibility without the hassle:

AI PDF Editor (/ai-edit): Scans your PDFs for accessibility gaps and suggests fixes. No software downloads, no steep learning curve.
PDF to Word / Word to PDF: Convert files while preserving structure and tags for better accessibility.
Merge PDF: Combine multiple accessible PDFs into one, streamlining distribution and reducing clutter.
AI PDF Chatbot (/ai-rag): Chat with your PDFs to verify content, check for missing tags, or even extract structured data for reports.

Best of all, PDFKro is free. No hidden fees, no subscriptions—just tools that make compliance easier.

Try this now: Grab a PDF from your organization’s website, upload it to PDFKro’s AI PDF Editor, and see how it scores for accessibility. You might be surprised by what you find!

Final Thought: Accessibility Is a Process, Not a Project

Compliance isn’t a one-and-done task. It’s an ongoing commitment to making sure your digital content works for everyone. Start small, prioritize high-impact documents, and use the right tools to stay on track.

Your community—and your legal team—will thank you.

Ready to make your PDFs accessible? Try PDFKro for free today.

PDF Accessibility & Compliance Guide for Public Organizations: Don't Skip This Step!