PDF accessibility means creating documents that people with disabilities can read, navigate and understand using different devices and assistive technologies, including screen readers and magnification tools. To create an accessible PDF, use a clear document structure, meaningful headings, appropriate tags, logical reading order, descriptive alternative text and accessible links and forms. You must also test the finished document because a PDF that looks correct visually may still be difficult to use with assistive technology.
Quick PDF Accessibility Checklist
- The text is selectable and searchable.
- The document has a logical heading structure.
- PDF tags identify headings, paragraphs, lists, tables and other content correctly.
- The reading order follows the intended sequence.
- Meaningful images have appropriate alternative text.
- Decorative images are marked appropriately.
- Links use descriptive text.
- Tables have correctly identified header cells and relationships.
- Form fields have accessible names, instructions and a logical tab order.
- Text and meaningful visual elements have sufficient contrast.
- The document has a meaningful title and the correct language setting.
- Keyboard navigation and screen-reader output have been tested.
- Automated accessibility checks have been completed and their findings reviewed.
What is PDF Accessibility?
PDF accessibility is the practice of creating or remediating Portable Document Format (PDF) files so that people with disabilities can access their information and interact with their features.
Text
Content must be available as machine-readable text rather than only as an image.
Structure
Tags identify headings, paragraphs, lists, tables and other content types.
Reading order
Content must be presented in a meaningful sequence.
Non-text content
Images and other meaningful visual information need appropriate alternatives.
Navigation and interaction
Links, bookmarks, tables and form fields must work as intended.
Document settings
The title and language must be configured appropriately.
Why Is PDF Accessibility Important?
PDF accessibility helps organisations:
- Improve access to information: People can navigate and understand documents using the methods that work for them.
- Support inclusive services: Accessible documents make information more usable across education, government, finance and other sectors.
- Improve usability: Proper headings, readable text and meaningful navigation help many users, including those reading on smaller screens.
- Address applicable accessibility requirements: Depending on the organisation and document, relevant requirements may arise under Section 508, the ADA, WCAG-based policies or other applicable frameworks.
- Establish a repeatable publishing process: Accessible source documents, consistent testing and clear ownership help prevent recurring problems.
3 Main Parts of an Accessible PDF
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Visual
What you see on the screen is the visual layer of a PDF. One of the biggest perks of using a PDF is that it preserves the exact look and layout of the original document, often called the "source document." Whether you're viewing it on different devices with varying screen sizes or printing it out, the appearance stays consistent, making it incredibly reliable.
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Content
The PDF accessibility comes with a second layer of content that handles the essential formatting of text, such as colors, fonts, and the arrangement of text into lists or tables. If you choose to “reflow” a document, say, to make it easier to read on a smaller screen, this layer takes over, displaying the content in a simplified format instead of sticking to the original visual layout.
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Tags
The tags layer is where a document's structure lives. It organizes elements like links, headings, tables, and lists. This layer plays a crucial role in supporting assistive technologies, such as screen readers, by giving them access to this structured information. For instance, a screen reader can help users jump straight to headings, making navigation faster and more efficient.
What Are the Key Characteristics of an Accessible PDF File?
Accessible PDF files share several essential characteristics that ensure the content can be read, interpreted, and navigated by all users, including those using assistive technologies. Below are the key features that define an accessible PDF.
Searchable text
Text must be selectable, not a scanned image. Scanned PDFs need OCR before remediation can begin.
Fonts that support extraction
Fonts must map correctly to Unicode so software can extract, read aloud, or convert text to Braille.
Labeled form fields
Fields need clear labels, a logical tab order, and extended time options where limits apply.
Hyperlinks and navigation
Bookmarks, descriptive links, and a table of contents help readers move through the document.
Language and title settings
A set document language and meaningful title help screen readers and file identification.
Assistive-tech-friendly security
Print or edit restrictions are fine, but text must stay available to speech and Braille tools.
Structure tags and reading order
Tags identify headings, lists, and tables, and define the order screen readers follow.
Alt text for non-text elements
Images and icons need meaningful descriptions; multimedia needs captions or transcripts.
How to Make a PDF Accessible?
Create a Logical Reading Order
Add PDF Tags
- Heading Tags: They provide structure to your document and organize the content inside. The first heading should be in H1 and then followed in a hierarchical structure up to H6. The levels should not be skipped.
- Link Tags: The links inside an accessible PDF should have descriptive link tags.
- Paragraph Tags: PDF accessibility is incomplete without adding a paragraph tag which can be indicated with ato show regular paragraph text.
- List Tags: Lists are a great way to keep content organized. To structure them properly, use list to wrap the entire list, list tag for individual items, and to define the content within each list item.
- Table Tags: For creating accessible PDF documents, data tables should include clear headers for both columns and rows, with a scope designated to link header cells to their data. Complex tables should be simplified, but if used, cell IDs must ensure proper association. Layout tables should not be tagged as data tables, and a table of contents should be structured appropriately, with navigational links for easy access. Read More : How to Tag Tables in PDFs
- Image Tags: When adding images for PDF accessibility, wrap them in a figure tag and make sure to include meaningful alt text that accurately describes the image.
Add Alt Text
Check Color Contrast
Tag Interactive Elements
Contain Necessary Metadata
How to Check PDF Accessibility?
Automated PDF Checking Tools
Manual Testing
Assistive Technology
Related Read : PDF Accessibility Strategies For Web Content
How Continual Engine Helps You Create Accessible PDFs?
Continual Engine offers two paths to PDF accessibility, automated remediation software your team runs in-house, or fully managed remediation handled by our specialists. Either approach ensures your documents meet WCAG 2.2, PDF/UA, ADA, and Section 508 standards.
Do it yourself
PREP PDF Accessibility Software
PREP combines automation with accurate tagging so your team can remediate PDFs at scale, without extensive technical training. Its cloud-based interface supports collaboration, handles scanned files through OCR, and aligns outputs with WCAG 2.2, PDF/UA, ADA, and Section 508.
Explore PREPLet us handle it
Continual Engine PDF Accessibility Services
If you prefer expert assistance, our trained accessibility specialists review, tag, and test every document to ensure correct reading order and full compatibility with assistive technologies. Ideal for organizations managing large volumes of PDFs or needing reliable compliance.
Explore PDF Accessibility servicesFrequently Asked Questions (FAQs):
What are some of the best tools for PDF accessibility?
Here are some top PDF accessibility tools:
- PREP: A leading PDF remediation software.
- Adobe Acrobat Pro DC: Ideal for creating and editing accessible PDFs.
- PAC (PDF Accessibility Checker): A tool for testing PDF accessibility.
- Online PDF Checkers: Quick, basic checks for accessibility.
- Assistive Technologies: Screen readers and other tools help test PDF accessibility.
What are the key guidelines for PDF accessibility?
The main PDF accessibility guidelines include:
- PDF/UA: An international standard for making PDFs accessible.
- WCAG: Although focused on web content, many of its principles are also relevant to PDFs.
What are the main principles of PDF accessibility?
The core principles of PDF accessibility are:
- Perceivable: Information should be presented in a way that users with disabilities can perceive.
- Operable: The interface and navigation should be easy to use.
- Understandable: Content and navigation must be clear and easy to understand.
- Robust: The content should be compatible with various user agents, including assistive technologies.
How do you make a PDF screen reader friendly?
A PDF becomes screen reader friendly when it includes proper tagging, a logical reading order, searchable text, descriptive alt text, labeled form fields, and meaningful links. Setting the document language and testing the file with a screen reader ensures accurate navigation and interpretation.
What does an accessible PDF look like?
An accessible PDF has clear structure, searchable text, organized headings, tagged lists and tables, descriptive links, and alt text for images. It supports keyboard navigation, works smoothly with screen readers, and presents information in a logical, easy-to-follow format for all.
How do I make a PDF link accessible?
Use descriptive link text that explains the destination, never “click here” or a bare URL, since screen readers announce link text out of context. Links should be keyboard-navigable in a logical tab order and visually distinguishable from surrounding text, typically with an underline rather than color alone.
What accessibility features should I look for in a PDF editor?
Look for an editor that creates and edits tags directly, sets reading order, adds alt text, defines table headers with scope, flags color contrast issues, and runs automated accessibility checks. Adobe Acrobat Pro DC covers these natively, while tools like PREP add automation for high-volume remediation.
What makes a PDF accessible?
An accessible PDF has a complete tag structure, searchable text, alt text for images, labeled form fields, descriptive links, a defined document language, and a reading order matching the visual layout. These elements work together, and missing any one leaves the document only partially accessible.
