PDF Accessibility Module Project — Complete Guide

In this tutorial, you will learn about PDF Accessibility Module Project. We cover key concepts, practical examples, and best practices to help you master this topic.

The PDF accessibility module project is your capstone exercise: take a real-world PDF, perform a full accessibility audit, fix all identified issues using the tools and techniques from this module, and produce a verified accessible PDF along with a remediation report.

What You'll Learn

You will apply all the skills from this module — tagged structure, reading order, headings, alt text, tables, form fields, language tagging, color contrast, and tool usage — to remediate a single document from start to finish.

Why It Matters

Remediating a single PDF end-to-end is the best way to internalize the workflow. You will encounter real-world complications that each lesson alone cannot cover: conflicting visual design, edge cases in table structure, and the need to balance accessibility with layout requirements.

Real-World Use

A government contractor must remediate 500 legacy PDFs before a Compliance deadline. The remediation team follows the exact workflow you will use here: inspect, fix, verify, report. Each PDF takes 30–90 minutes depending on complexity.

Project Workflow

flowchart TD
  A[Select PDF] --> B[Initial Scan]
  B --> C[Run Checkers]
  C --> D[Tag Fixing]
  D --> E[Reading Order]
  E --> F[Alt Text]
  F --> G[Tables & Forms]
  G --> H[Language & Contrast]
  H --> I[Final Verification]
  I --> J[Remediation Report]
  J --> K[Screen Reader Test]

Step-by-Step Instructions

Step 1: Select a PDF

Choose a PDF that meets these criteria:

• At least 3 pages
• Contains headings (at least 3 levels)
• Includes at least 2 images
• Has at least 1 table (3+ rows and 3+ columns)
• Ideally has form fields or fillable elements

Good sources: government forms, financial reports, academic papers, product manuals.

Step 2: Initial Scan

Before any changes, document the current state:

// Acrobat JavaScript for initial assessment
var state = {
    tagged: this.structTreeRoot !== null,
    language: this.info.Language || "Not set",
    title: this.info.Title || "Not set",
    pageCount: this.numPages,
    formFields: this.getFields().length
};

console.println("=== Initial Assessment ===");
console.println("Tagged: " + state.tagged);
console.println("Language: " + state.language);
console.println("Title: " + state.title);
console.println("Pages: " + state.pageCount);
console.println("Form fields: " + state.formFields);

Step 3: Run Checkers

Run at least two checkers:

1. Acrobat Accessibility Checker (Accessibility > Full Check)
2. PAC 2021 for PDF/UA validation

Document all failures.

Step 4: Fix Tags

1. If untagged: Accessibility > Auto-Tag Document
2. Inspect the tag tree in the Tags panel
3. Fix incorrect tag types (e.g., change <P> to <H1>)
4. Ensure one <H1>, correct <H2> and <H3> hierarchy
5. Reorder tags to fix reading order

Step 5: Add Alt Text

1. Find all <Figure> tags without alt text
2. Add descriptive alt text to each
3. Mark decorative images as artifacts

Step 6: Fix Tables

1. Verify <Table> structure has <TR>, <TH>, <TD>
2. Ensure header row uses <TH> with scope attributes
3. Check merged cells have correct RowSpan/ColSpan
4. Split or retag layout tables as artifacts

Step 7: Forms and Interactive Elements

1. Open Prepare Form tool
2. Add tooltips to all form fields
3. Verify tab order (left to right, top to bottom)
4. Set radio button groups with consistent names
5. Add accessible error validation

Step 8: Language and Contrast

1. Set document language (File > Properties > Language)
2. Mark any inline language changes in the tag tree
3. Check color contrast for all text elements
4. Fix any elements below 4.5:1 ratio

Step 9: Final Verification

# Verification checklist
checks = [
    "Document is tagged",
    "Document language is set (en-US or appropriate)",
    "Document title is set in metadata",
    "One H1 heading exists",
    "No heading levels are skipped",
    "All images have alt text",
    "Tables use TH for header cells",
    "Reading order matches visual order",
    "Form fields have tooltips",
    "Color contrast passes WCAG AA",
    "Tab order is logical",
    "Security settings allow assistive tech access"
]

for check in checks:
    print(f"[ ] {check}")

Step 10: Screen Reader Test

Test the remediated PDF with NVDA or JAWS:

• Navigate by heading (press H to jump)
• Navigate by table (press T)
• Tab through form fields
• Listen to image alt text in context
• Verify reading order sounds natural

Remediation Report Template

# PDF Accessibility Remediation Report

## Document Information
- File: [filename.pdf]
- Pages: [number]
- Source: [Word/InDesign/scanned]

## Initial Assessment
- Tags present: [Yes/No]
- Language set: [Yes/No]
- Alt text: [X images, Y with alt text]
- Checker results: [Acrobat: X errors, PAC 2021: Y failures]

## Issues Found and Fixed

| Issue | Severity | Tool | Fix Applied |
|-------|----------|------|-------------|
| Missing tags | Critical | Acrobat | Auto-tag + manual fix |
| No alt text on Figure 3 | Critical | PAC 2021 | Added alt text |
| H1 missing | Critical | Acrobat | Changed first H2 to H1 |
| ... | ... | ... | ... |

## Final Verification
- Acrobat Checker: [Pass/Fail]
- PAC 2021: [Pass/Fail]
- Screen reader test: [Pass/Fail]
- Time spent: [X hours]

## Notes
[Any observations, challenges, or recommendations]

Common Mistakes

1. Choosing a PDF that is too simple — A 1-page document with no images, no tables, and no forms does not exercise the skills you learned. Choose something with real complexity.

2. Skipping the initial scan — Without documenting the before state, you cannot measure your progress. Always run checkers before you start.

3. Fixing only checker-reported issues — Checkers miss semantic problems. Manually verify heading hierarchy, reading order, and form usability.

4. Not testing with a screen reader — If you do not test with NVDA or JAWS, you will not know whether the user experience is actually improved.

5. Spending too long on one issue — Set a time budget (e.g., 2 hours for a 5-page PDF). Some issues take more time than they are worth. Use the severity scale to prioritize.

Submission

Submit your remediation report along with the before and after PDFs. Your report should include:

• Initial scan results
• Checker outputs (before and after)
• List of issues found and fixes applied
• Final verification results
• Screen reader test notes
• Time spent on each phase

What's Next

Congratulations on completing the PDF accessibility module. You are now equipped to remediate PDFs for compliance with PDF/UA and WCAG. To continue your accessibility journey, explore related topics like Color Contrast for broader contrast considerations, or return to the Accessibility Module Overview to plan your next module.