Scanned PDFs are images and unreadable by screen readers. OCR converts them into real text.
How to OCR a PDF in Adobe Acrobat Pro:
- Open the PDF in Adobe Acrobat Pro.
- Go to Tools → Scan & OCR → Recognize Text → In This File.
- Choose the correct Document Language.
- Click Recognize Text to convert the scan into selectable text.
- Go to Tools → Prepare for Accessibility to check for reading order, tags, and missing structure.
- If the scan is poor quality, export to Word, fix the text, and save back as a tagged PDF.
- For complex PDFs (math, code, tables), an accessibility exception may be needed.


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