What OCR does
A scanned PDF is a stack of pictures: you can read it, but your computer can't, so Ctrl+F finds nothing and you can't copy a sentence. OCR (optical character recognition) reads the words on each page and adds them as an invisible text layer in the same place. The pages look exactly the same, but now you can search, select and copy.
How to make a PDF searchable
- Choose your scanned PDF.
- Pick the document language.
- Keep Skip pages that already have text ticked for mixed documents, so only the scanned pages are read.
- Click Make searchable.
Getting accurate results
- Clean, straight scans at 300 dpi read best.
- Handwriting, very small print and photos taken at an angle may contain mistakes.
- Photographing pages with a phone? Scan to PDF straightens and cleans them up, and can add OCR in the same step.
OCR or PDF to Word?
Use OCR PDF to keep the document as a PDF that you can search. Use PDF to Word with OCR when you want to edit the text in Word.