Make PDFs Accessible: 7 Practical Tips

By SwiftPDF Team · Updated 2026-08-07 · 3 min read

A PDF that looks perfect can be completely unusable — to the blind professional navigating it with a screen reader, to the commuter listening via text-to-speech, to anyone who can't use a mouse. Accessibility isn't a niche concern; in many jurisdictions it's a legal one.

The fixes below are ordered by impact. The first three solve the majority of real-world problems.

1. Use real text, not pictures of text

The number-one accessibility failure: scanned documents where each page is an image. Screen readers see nothing. The fix is OCR (optical character recognition) — Acrobat, ABBYY FineReader and even free tools like Google Drive's 'Open with Docs' convert scans into searchable, readable text.

Test yours: try selecting text in the PDF. If you can't select it, neither can assistive technology.

2. Tag the document structure

Tags tell screen readers what everything is: this is a heading, that's a list, this is a table with headers. In Word, proper use of Heading styles exports as tags automatically. In Acrobat, the Accessibility checker can auto-tag, though you'll want to verify the results.

Untagged PDFs are read as an undifferentiated text stream — technically readable, practically exhausting.

3. Fix the reading order

Multi-column layouts, sidebars and pull quotes scramble reading order. What looks fine visually may read as gibberish when linearized. Acrobat's Reading Order tool lets you drag content into the correct sequence — essential for newsletters, brochures and reports.

4. Write alt text for meaningful images

Every informative image needs alternative text describing its content or function. Decorative images should be marked as artifacts so screen readers skip them. Alt text should convey the point of the image, not just describe it: 'Q3 revenue grew 18% to $4.2M' beats 'bar chart'.

5. Use real headings in hierarchy

Headings are how screen-reader users navigate — they pull up a list and jump. Use true heading levels (H1 → H2 → H3) in order, not bold paragraphs styled to look like headings. One H1 per document.

6. Check color contrast and don't rely on color alone

Light-gray text on white fails contrast minimums (4.5:1 for normal text under WCAG). And information conveyed only by color — 'required fields are in red' — is invisible to color-blind users. Pair color with text or symbols.

7. Label form fields

Every form field needs an accessible label or tooltip describing what to enter. 'Text field 47' helps nobody. This is also just good form design — clear labels help every user.

Validate with checkers

Acrobat's built-in Accessibility Check and the free PAC (PDF Accessibility Checker) scan for these issues systematically. Run one before publishing anything official — automated checks catch what tired eyes miss, though manual testing with an actual screen reader remains the gold standard.

Start with the source document

The cheapest accessibility win is upstream: build it into the Word, Google Docs or InDesign source. Use real heading styles, add alt text to images as you place them, and write descriptive link text instead of 'click here.' A well-structured source exports to a mostly-accessible PDF automatically.

Retrofitting accessibility into a finished PDF takes five to ten times longer than building it in. If you produce PDFs regularly, fix the template once and every future export inherits the accessibility.

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Frequently asked questions