Make a Scanned PDF Readable for Screen Readers
To a screen reader, a scanned PDF is a series of pictures: there is no text to read aloud, search or enlarge. Accessibility rules such as the ADA and Section 508 in the US and the European Accessibility Act, which applies to many products and services in the EU since June 2025, expect documents to work with assistive technology. OCR is the necessary first step – it turns the page images into real text – but a fully accessible PDF also needs tags, a reading order and alternative text.
From Scan to Accessible PDF
- Run OCR Upload the scan to OCR PDF and choose the language of the document.
- Test the text Select some text, search with Ctrl+F, or let Listen to PDF or your screen reader read a page aloud.
- Add structure In an accessibility editor such as Adobe Acrobat Pro, add tags, headings, the reading order, alternative text for images and the document language.
- Check it Test the result with an accessibility checker, for example PAC or the checker in Acrobat.
What OCR Fixes – and What It Does Not
OCR fixes: no text
After OCR the text exists: it can be read aloud, searched, copied and enlarged by readers that reflow text.
OCR does not add tags
Headings, lists, tables and the reading order are not marked up. Screen readers may read columns or side notes in the wrong order.
Images need alt text
Photos, charts and logos need a short description, which OCR cannot write.
Language matters
Choose the correct language: it improves recognition, and screen readers use the document language for pronunciation.
Clear scans read better
Faint or grey scans produce wrong words that a screen reader then reads out. Improve them first with Enhance PDF.
Office files with pictures of text
When converting Word to PDF, the option "OCR: make text inside images searchable" in Word to PDF also adds text for pictures of text.
Good to Know
- OCR PDF does not create a tagged PDF. Treat the result as a searchable PDF, not as a document that passes PDF/UA or WCAG checks on its own.
- The most accessible document is made from the original digital file – Word or Google Docs with real headings and alt text. OCR is the way forward when only paper or a scan exists.
Scanned PDF Accessibility – FAQ
Does OCR make my PDF ADA or WCAG compliant?
Not on its own. OCR provides the text; compliance also needs tags, reading order, alternative text and a document language.
Can a screen reader read the PDF after OCR?
Yes, the recognized text can be read aloud. Without tags, the reading order may not always follow the layout.
Which languages are supported?
Available languages: العربية, বাংলা, Български, Čeština, 简体中文, 繁體中文, Deutsch, Ελληνικά, English, فارسی, Français, עברית, हिन्दी, Magyar, Bahasa Indonesia, Italiano, 日本語, 한국어, Bahasa Melayu, Nederlands, Polski, Português, Română, Русский, Español, Svenska, ไทย, Türkçe, Українська, اردو, Tiếng Việt. Choose up to four for one document.
Will the document look different?
No. The page images stay the same; the text layer is invisible.
Is it free?
Yes, without sign-up or watermark. Files are deleted after processing, after one hour at the latest.
Start with the Text Layer
Add real, readable text to your scanned PDF with OCR PDF – the first step to an accessible document.
Add Text to My Scanned PDF