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Step-by-Step Guide to Tagging PDFs for Accessibility

Jan 19, 2025

TL;DR: Tagging PDFs is essential for accessibility, transforming static files into navigable, inclusive documents. Start by organizing content, applying proper tags for headings, paragraphs, images, lists, and tables, and then test thoroughly with accessibility tools and real users. EqualWeb provides tools and expertise to streamline this process.



Why Tagging is Important for PDF Accessibility

Without proper tags, a PDF is little more than a static image—difficult, if not impossible, for assistive technologies like screen readers to interpret. Tags add structure to your PDFs, enabling these technologies to identify headings, paragraphs, images, and other elements. They transform a flat file into an interactive and navigable document.
By tagging your PDFs, you’re not only enhancing the user experience but also meeting compliance standards and demonstrating your commitment to inclusivity. EqualWeb’s PDF Accessibility Tools simplify this process and ensure your PDFs are fully accessible.


Preparing the Document for Tagging

Preparation is the foundation of effective tagging. Optimizing your document from the start can save time and effort later. Here’s how to prepare your PDF:
  • Organize Your Content: Use clear, descriptive headings and maintain a logical flow throughout the document.
  • Set the Reading Order: Ensure the reading order aligns with the document’s intended sequence so assistive technologies can follow it correctly.
  • Prepare Visual Elements: Identify images and graphics that require alt text or need to be marked as decorative.
Our Web Accessibility Checker can identify potential issues in your PDFs before tagging begins, streamlining the process.


How to Add Tags to PDF Elements

Tagging requires attention to detail to ensure all elements are accessible. Here’s how to effectively tag each part of your document:
  1. Headings
    Assign appropriate heading levels (H1, H2, H3, etc.) to create a structured hierarchy. This guides users and enhances navigation.
  2. Paragraphs
    Tag body text correctly to ensure screen readers can process and present the content smoothly.
  3. Images
    Add descriptive alt text for meaningful visuals to convey their purpose to visually impaired users. Mark purely decorative images as artifacts to avoid unnecessary distractions.
  4. List
    Use "List" and "LItem" tags to ensure that list items are read in the correct order by assistive technologies.
  5. Tables
    Define table headers and associate them with their respective cells. This helps screen readers interpret data and improves comprehension for users.
Tools like our PDF Accessibility Checker can help ensure that your tagging meets the highest standards.


Testing the Tagged PDF for Accessibility

Testing is crucial to confirm that your tags work as intended. Follow these steps to verify accessibility:
  1. Run an Accessibility Checker
    • Use tools like Adobe Acrobat’s built-in checker to identify missing or incorrect tags.
  2. Test with Screen Readers
    • Navigate your PDF using screen readers like NVDA or JAWS to ensure accessibility features are functional.
  3. Validate with Real Users
    • Whenever possible, involve users with disabilities to gain practical insights and confirm usability in real-world scenarios.


Building a More Accessible Web

Tagging PDFs for accessibility may seem complex, but it’s an essential process to make your digital content inclusive, compliant, and user-friendly. EqualWeb’s tools and services, including Accessibility Auditing, provide the expertise you need to ensure your documents meet accessibility standards.

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