PDF Accessibility Guide
PDF Accessibility Guide
Everything you need to know about making your PDFs accessible — from tagged structure and alt text to reading order, colour contrast, and automated testing with AI-powered analysis.
Why PDF Accessibility Matters
PDFs are everywhere — reports, forms, invoices, contracts. But most PDFs are visual-only documents that screen readers cannot parse. An inaccessible PDF is the digital equivalent of a locked door.
2.5 Billion PDFs
Created every year — the vast majority without any accessibility tagging. Each one potentially excludes millions of users with disabilities.
Legal Requirement
Australian DDA, US Section 508, European Accessibility Act — PDF accessibility is legally mandated across jurisdictions worldwide.
Government Mandates
All government PDFs in Australia, the US, UK, EU, and Canada must meet accessibility standards. Non-compliance risks complaints and lawsuits.
Better Searchability
Tagged PDFs with proper structure are searchable, indexable, and reflow correctly on mobile devices — better for everyone, not just users with disabilities.
95%+ Fail
The overwhelming majority of PDFs online are not tagged at all. Even PDFs that appear formatted are usually completely inaccessible to assistive technology.
Easy to Fix at Source
Most PDF accessibility issues are preventable. Proper settings in Word, InDesign, or Google Docs produce tagged PDFs automatically.
PDF/UA and WCAG Standards
PDF accessibility is governed by two complementary standards: PDF/UA (ISO 14289) for the technical structure, and WCAG 2.2 for the user experience. Together, they define what an accessible PDF must include.
Tagged Structure
Every element — headings, paragraphs, lists, tables — must be tagged with its semantic role. This is the foundation of PDF accessibility.
Reading Order
Content must follow a logical reading sequence. Multi-column layouts, sidebars, and footers must be ordered correctly for screen readers.
Alternative Text
Every meaningful image, chart, and diagram must have alternative text. Decorative elements must be marked as artifacts.
Document Metadata
Title, language, author, and subject must be set. The title — not the filename — must display in the browser tab.
PDF/UA-1
ISO 14289-1 — technical requirements for tagged PDF structure, metadata, and assistive technology compatibility.
WCAG 2.2 AA
Web Content Accessibility Guidelines applied to PDF — colour contrast, text alternatives, navigability, and understandability.
Section 508
US federal standard requiring electronic documents — including PDFs — to be accessible. Aligns with WCAG 2.0 AA minimum.
Most Common PDF Accessibility Issues
These are the issues our checker detects most frequently across 30+ automated checks. Each one can make your PDF partially or completely unusable for people with disabilities.
No Tagged Structure
The single most common issue. Without tags, a PDF is just a collection of pixels — screen readers cannot distinguish headings, paragraphs, or lists.
PDF/UA 7.1Missing Image Alt Text
Images, charts, and diagrams without alternative text descriptions are invisible to screen reader users. Every meaningful image needs alt text.
WCAG 1.1.1Non-Extractable Text
Scanned documents without OCR produce image-only pages. The text is visible to sighted users but completely invisible to assistive technology.
PDF/UA 7.2Low Colour Contrast
Text that doesn't meet WCAG contrast ratios (4.5:1 normal, 3:1 large) is hard or impossible to read for users with low vision.
WCAG 1.4.3No Document Language
Without a declared language, screen readers cannot use correct pronunciation rules. Australian English and German sound very different.
WCAG 3.1.1Missing Form Labels
Interactive form fields without labels leave screen reader users guessing what to enter. Every text field, checkbox, and dropdown needs a descriptive label.
WCAG 1.3.1Incorrect Reading Order
Multi-column layouts, sidebars, and headers/footers often read in the wrong sequence. Content must follow a logical order.
WCAG 1.3.2Missing Table Headers
Data tables without header cells (TH) leave screen reader users unable to understand the relationship between rows and columns.
WCAG 1.3.1Missing Bookmarks
PDFs longer than a few pages need bookmarks for navigation. Without them, finding specific content means scrolling through every page.
PDF/UA 7.3Title Not Displayed
The document title — not the filename — must display in the browser tab. "Q3-Report-FINAL-v2.pdf" is not a helpful title for anyone.
WCAG 2.4.2What Our PDF Checker Tests
30+ automated checks across eight categories — covering both PDF/UA and WCAG 2.2 requirements. Every issue is mapped to specific standards with weighted severity scoring.
Structure & Tags
Tagged PDF validation, heading hierarchy, nested headings, list structure (L/LI tags), artifacts marked, role mapping, header/footer artifacts.
Images & Alt Text
Missing alt text, decorative images not artifacted, figure captions, images of text detection. AI suggests alt text descriptions for images missing them.
Colour & Contrast
Text-to-background contrast ratios for normal text (4.5:1) and large text (3:1). Reports exact ratios found vs expected for every failing element.
Tables
Table headers (TH), correct Table/TR/TD structure, scope attributes, complex table relationships, and consistent cell structure.
Reading Order & Navigation
Logical reading sequence, bookmarks for long documents, tab order for interactive elements, page numbering, consistent spacing.
Forms & Links
Form field labels, link text descriptions (no "click here"), annotation types, interactive element tab order and accessibility.
Fonts & Text
Font embedding verification (fully embedded, not subset issues), extractable text, natural language declarations and language changes within content.
Metadata & Security
Document title, language, author/subject/keywords, title display setting, PDF version, security restrictions that block assistive tech, embedded files, JavaScript actions.
Weighted Severity Scoring
Issues are scored by severity: critical issues carry 4× weight, warnings 2×, and informational items 1×. Your overall score (A–F) reflects the true accessibility impact — not just the count of issues. Re-upload your fixed PDF to track score improvements over time.
Features No Other Tool Offers
Our PDF Accessibility Checker goes far beyond simple pass/fail detection. AI-powered analysis, visual preview with markers, screen reader simulation, batch processing, and downloadable compliance reports — all in one tool.
AI-Powered Explanations
Every detected issue includes an "Explain" button. Our AI provides a plain-English explanation of the problem, why it matters, and step-by-step fix instructions for your specific source application.
AI Alt Text Suggestions
For images missing alternative text, our AI analyses the visual content and suggests descriptive alt text — ready to copy into your source document.
AI Summary & Priorities
One-click AI Summary analyses all issues and produces a prioritised action plan — which issues to fix first for maximum accessibility improvement. Includes an executive-friendly "Explain to My Boss" export.
Visual Preview & Markers
See your PDF rendered with interactive markers overlaid on each issue. Click any issue to jump to the exact page and location. Zoom in/out and navigate issue-by-issue through the document.
Screen Reader Simulation
Reading order visualisation shows numbered overlays of exactly how a screen reader navigates your document. Listen mode reads the PDF aloud in the detected order. Tab order simulation shows the focus path through interactive elements.
Downloadable PDF Report
Generate a professional A4 report with your score, compliance badge, all issues with fix guides, and remediation cost estimate. Share it with your team, client, or management — branded and ready to print.
6 Country Standards
Compliance assessment against Australian DDA, US Section 508, UK Equality Act, EU European Accessibility Act, Canadian ACA, and international PDF/UA. Each report shows your compliance status per jurisdiction.
Compliance Certificate
PDFs that pass all checks receive an embeddable SVG compliance badge — "WCAG 2.2 AA Compliant" — ready to display on your website as proof of accessibility.
Fix Cost Estimator
Country-specific cost estimates for professional remediation, based on issue types and severity. Know what to budget before you start — or use our AI guide to fix it yourself.
Check Your PDF Now
Upload any PDF and get a full accessibility audit with AI-powered explanations, visual preview markers, and downloadable compliance report. No account needed.
Fix It at the Source
The easiest way to make an accessible PDF is to create it correctly from the start. Our AI-powered fix guides tell you exactly what to change in your source application — with step-by-step instructions for every detected issue.
Microsoft Word
Heading styles, alt text panel, table headers, "Export as Tagged PDF" checkbox, reading order via Selection Pane.
Adobe InDesign
Tags panel, Articles panel for reading order, Object Export Options for alt text, PDF export presets for PDF/UA compliance.
Google Docs
Built-in heading styles, image alt text via right-click, "Download as PDF" preserves basic tagging automatically.
PowerPoint
Slide reading order via Selection Pane, alt text for images and shapes, table structure, "Save as PDF" with tags.
Adobe Acrobat Pro
Tag tree editing, reading order tool, accessibility checker, form field properties, action wizard for batch fixes.
LibreOffice & More
LibreOffice Writer, Canva, Figma PDF exports, LaTeX with accessibility packages — guidance for every source.
AI Remediation Guide
Beyond individual issue fixes, our AI generates a complete step-by-step remediation guide for your entire document — prioritised by impact, with instructions tailored to your source application. Follow it top-to-bottom for the fastest path to full compliance.
How to Make Your PDF Accessible
The best approach is to fix issues at the source document level. Here is a practical step-by-step process that works for any PDF.
Upload and Scan
Use our PDF Accessibility Checker to identify all issues. Review the score (A–F), compliance badge, and AI Summary for the big picture. Use batch upload if you have multiple documents.
Add Tags First
If your PDF is untagged, this is the #1 priority. Go back to your source file (Word, InDesign) and export with "Tagged PDF" enabled. Our AI tells you the exact setting for your application.
Fix Alt Text
Add alternative text to every meaningful image. Mark decorative images as artifacts. Use our AI Alt Text Suggestions as a starting point — review and refine the descriptions.
Set Document Properties
Add a meaningful title, set the document language, and configure "Display: Document Title" instead of filename. Complete author, subject, and keywords metadata.
Verify Reading Order
Use our reading order visualisation to see numbered overlays of the exact sequence a screen reader follows. Listen to the document with the built-in listen mode to hear it as a screen reader user would.
Re-check and Compare
Upload the fixed PDF for another scan. Our comparison tool shows side-by-side improvements between your original and fixed version. Track score trends over time in your dashboard.
Built for Teams & Enterprises
From individual consultants to large organisations — our PDF checker scales with your needs. Batch processing, API access, team dashboards, and WordPress integration included.
Batch Upload
Upload multiple PDFs at once and get a combined report across all documents. Ideal for auditing entire document libraries or compliance reviews.
Public API
Integrate PDF accessibility checking into your own workflow with our rate-limited REST API. Authenticate with API keys and process documents programmatically.
Team Accounts
Shared credit pools, team dashboard with usage analytics, and role-based access. See your team's complete audit history in one place.
WordPress Media Scanner
Scan every PDF on your WordPress site in one click. Identifies inaccessible documents in your media library and prioritises them for remediation.
History & Dashboard
Logged-in users get a personal dashboard showing all previous checks, score trends over time, and quick re-scan access for each document.
Before & After Comparison
Upload your original and fixed PDF side by side. See exactly which issues were resolved, which remain, and how your score improved.
Simple Credit-Based Pricing
Start with a free check — no account needed. Purchase credit packs when you need more: 5 checks for $10 or 10 for $15. Team accounts get volume discounts and shared credit pools. Secure Stripe payment processing.
Frequently Asked Questions
What is the difference between a tagged and untagged PDF?
A tagged PDF contains hidden structural markup (like HTML tags) that identifies headings, paragraphs, lists, tables, and images. An untagged PDF is essentially a flat image — visually identical but completely inaccessible to screen readers. Tagged PDFs also support text reflow on mobile devices and accurate search indexing.
Does my Australian organisation need accessible PDFs?
Yes. The Disability Discrimination Act (DDA) covers all digital content including PDFs. The Australian Human Rights Commission has confirmed that inaccessible documents can be the basis for discrimination complaints. Government agencies are explicitly required to publish accessible documents, and private businesses are increasingly being held to the same standard.
What is PDF/UA and how does it relate to WCAG?
PDF/UA (ISO 14289) is a technical standard specifically for PDF accessibility — it defines how tags, metadata, and structure must be implemented within the file format. WCAG 2.2 covers the broader user experience (contrast, alt text, readability). A fully accessible PDF meets both standards. Our checker tests against both simultaneously and maps every issue to the relevant standard.
Can I make a scanned PDF accessible?
Scanned PDFs (image-only) first need OCR (Optical Character Recognition) to extract text. After OCR, you can add tags and structure. Adobe Acrobat Pro includes OCR. The quality depends on scan resolution — 300 DPI or higher is recommended. Our checker detects non-extractable text and flags it as a critical issue.
How does the AI explanation feature work?
Every detected issue has an "Explain" button that sends the issue details to our AI engine. It returns a plain-English explanation of what the problem is, why it matters for users with disabilities, and step-by-step instructions to fix it in your specific source application (Word, InDesign, Acrobat, Google Docs). For images missing alt text, our AI can also suggest descriptive text based on image analysis.
What country-specific standards do you support?
Six national frameworks: Australian DDA, US Section 508, UK Equality Act, EU European Accessibility Act, Canadian ACA, and the international PDF/UA standard. Each report shows your compliance status for your selected jurisdiction, with country-specific remediation cost estimates.
Can I check multiple PDFs at once?
Yes. Batch upload lets you submit multiple PDFs simultaneously and receive a combined report across all documents. This is ideal for auditing entire document libraries, compliance reviews, or onboarding new clients. Each document gets its own score and issue list, plus an aggregate summary.
Do you have an API for automated checking?
Yes. Our REST API allows you to integrate PDF accessibility checking into your own workflows. Authenticate with API keys, submit PDFs for analysis, and receive structured JSON results. Rate-limited for stability, with dedicated quotas for team accounts.
How does the comparison tool work?
Upload your original PDF and your fixed version. The comparison tool shows side-by-side differences — which issues were resolved, which remain, how your score improved, and how many WCAG criteria you now meet. It is the fastest way to verify your remediation work is effective.
What file size and types are supported?
The checker supports PDFs up to 50MB. Password-protected PDFs need the password removed before upload. We handle documents from any source: Word, InDesign, Google Docs, scanned documents, Canva exports, LaTeX, and more. Our WordPress Media Scanner can also find and check all PDFs on your website automatically.
Start Checking Your PDFs
Upload any PDF and get a comprehensive accessibility report with AI-powered explanations, visual preview markers, screen reader simulation, and downloadable compliance report.