Why scanned PDFs need a different conversion process
A regular PDF-to-Word converter reads the text that's already embedded in the PDF's structure. A scanned PDF has no such text — it's a photograph or scan saved as a page image, so there's nothing for a normal converter to extract. Trying to convert one without OCR produces an empty or garbled document.
How OCR bridges the gap
Optical Character Recognition analyzes the pixels of each scanned page, identifies shapes that correspond to letters and words, and reconstructs them as actual, selectable text. PrivaPDF's OCR then hands that recognized text to the same PDF-to-Word engine used for text-based PDFs, producing an editable .docx you can actually work with — rather than another static image.
What affects OCR accuracy
Scan quality matters more than anything else: a clean 300 DPI scan of a typed document recognizes near-perfectly, while a blurry phone photo of a page, or a document with handwriting, will have more errors that need manual correction afterward.