PDF Accessibility Checklist: Make Documents Accessible for Everyone

PDF accessibility ensures that everyone—regardless of ability—can read and understand your documents. Whether you're creating government reports, educational materials, business documents, or published content, following accessibility standards makes your PDFs usable by people using screen readers, keyboard navigation, and other assistive technologies.

Why PDF Accessibility Matters

Legal compliance: Many countries require accessible documents under laws like the ADA and Section 508
Larger audience: Approximately 15% of the global population lives with some form of disability
Better SEO: Accessible PDFs are more searchable and rank better in search engines
Improved usability: Accessible design benefits all users, not just those with disabilities
Professional standards: Accessibility is expected in modern document creation

The Complete PDF Accessibility Checklist

1. Text and Content Structure

Actual text, not images: Ensure all text is selectable and not embedded as images
Scanned documents: Run OCR on scanned PDFs to make text readable by screen readers
Decorative images: Mark purely decorative images as artifact so screen readers ignore them
Meaningful alt text: Add descriptive alternative text to all informative images and figures
Reading order: Verify content follows logical reading order (left-to-right, top-to-bottom)

2. Document Structure and Navigation

Document title: Set a descriptive title in document properties (not just filename)
Headings hierarchy: Use proper heading levels (H1, H2, H3) that nest logically
Bookmarks: Add bookmarks for documents longer than 9 pages
Page numbers: Include page numbers that match the PDF viewer's page counter
Table of contents: Provide internal links for easy navigation in longer documents

3. Color and Contrast

Color contrast: Maintain minimum 4.5:1 contrast ratio for normal text (3:1 for large text)
Color alone: Never use color as the only way to convey information
Text over images: Ensure sufficient contrast when text appears over background images
Colorblind friendly: Use patterns, labels, or icons in addition to color differentiation

4. Links and Interactive Elements

Descriptive link text: Use meaningful text like "Download annual report" instead of "click here"
Link destinations: Ensure all links work and lead to the correct destination
Form fields: Add descriptive labels to all form fields
Tab order: Set logical tab order for interactive elements
Buttons: Make sure buttons have descriptive names(not just "Submit")

5. Tables and Lists

Table headers: Mark header rows and columns so screen readers can navigate properly
Simple tables: Avoid complex nested tables when possible
Table summaries: Provide summaries for complex data tables
List structure: Use actual list tags (not just dashes or numbers) for bulleted and numbered lists

6. Fonts and Text Formatting

Embedded fonts: Embed all fonts used in the document
Unicode text: Use Unicode character encoding (not custom encoded fonts)
Font size: Use minimum 12pt font for body text
Text alignment: Left-align text for languages read left-to-right
Line spacing: Maintain adequate line spacing (1.5x or more) for readability

7. Document Metadata

Document language: Set the primary language in document properties
Author information: Fill in author and creator fields
Subject and keywords: Add descriptive metadata to help with organization
Creation date: Ensure creation and modification dates are accurate

Testing PDF Accessibility

Automated Testing Tools

Adobe Acrobat Pro: Built-in accessibility checker provides detailed reports
NVDA (Windows): Free screen reader to test document navigation
VoiceOver (macOS): Built-in screen reader for testing on Mac
PDF Accessibility Checker (PAC): Free tool for comprehensive PDF/UA validation

Manual Testing Checklist

Open the PDF and try selecting text—it should highlight properly
Test keyboard navigation using Tab key only
Listen to the document with a screen reader
Verify heading navigation jumps to correct sections
Check that form fields announce their labels
Test links to ensure they're accessible and functional

Common Accessibility Issues and Fixes

Issue: "No alternate text for image"

Solution: Right-click the image in Acrobat, select "Edit Alt Text," and add descriptive text

Issue: "Heading levels skipped"

Solution: Restructure headings to follow logical order (H1 > H2 > H3, not H1 > H3)

Issue: "Reading order issue"

Solution: Use Acrobat's Reading Order tool to arrange content in the correct sequence

Issue: "Color contrast insufficient"

Solution: Adjust colors to meet 4.5:1 ratio or add text indicators beyond color

Creating Accessible PDFs from Common Applications

From Microsoft Word

Use built-in heading styles (Heading 1, Heading 2) instead of manual formatting
Add alt text to images (right-click > Edit Alt Text)
Use table headers (Table Properties > Row > Repeat as header row)
Create proper hyperlinks (Insert > Link)
File > Save As > PDF with "Document structure tags for accessibility" checked

From Google Docs

Use Format > Paragraph styles for headings
Add alt text to images (right-click > Alt text)
Download as PDF (File > Download > PDF Document)

From Adobe InDesign

Structure documents with paragraph styles mapped to PDF tags
Add alt text to images in the Links panel
Set reading order in Articles panel
Export with "Create Tagged PDF" and "Use Structure for Tab Order" enabled

PDF/UA and WCAG Compliance

PDF/UA (ISO 14289)

PDF/UA is the international standard for accessible PDFs. Documents compliant with PDF/UA are maximally accessible to the widest range of users and assistive technologies.

WCAG 2.1 Guidelines

Web Content Accessibility Guidelines apply to PDF content as well:

Perceivable: Information must be presentable in ways users can perceive
Operable: Interface components must be operable by all users
Understandable: Information and UI operation must be understandable
Robust: Content must work with current and future assistive technologies

Remediating Existing PDFs

If you have existing PDFs that need accessibility improvements:

Run the accessibility checker in Adobe Acrobat Pro
Fix errors starting with the most critical (content then structure)
Add tags if the document is untagged (Tools > Accessibility > Autotag Document)
Review and correct reading order
Add alternative text to images
Test with actual assistive technology

For documents that are heavily scanned images, consider OCR processing first, then accessibility remediation.

Resources and Tools

WebAIM: Comprehensive accessibility resources and training
Adobe Accessibility: Official guides for creating accessible PDFs
Section 508: US federal accessibility standards
Access Forum: Community for accessibility professionals

Conclusion

PDF accessibility is an ongoing commitment rather than a one-time task. By following this checklist and making accessibility part of your standard document workflow, you ensure your content reaches the widest possible audience. The initial time investment pays off through broader reach, legal compliance, and the satisfaction of creating truly inclusive content.

Start with the most impactful changes—tagged structure, alt text, and proper reading order—then work toward full compliance as you become more comfortable with accessible document creation.