OCR a PDF Free — Make Scanned Documents Searchable & Copyable

You open a scanned PDF, press Ctrl+F to find a clause… and nothing. You try to copy a paragraph… and you can't select anything. That's because a scan is a photograph of text — your computer sees pixels, not words. OCR (optical character recognition) fixes that.

OCR a scanned PDF in 3 steps

1. Open the free OCR PDF tool.
2. Drop in your scanned PDF.
3. Download the searchable version.

The result looks identical to your scan, but with an invisible, perfectly aligned text layer underneath. Now you can search it, select and copy from it, and screen readers can speak it.

What OCR unlocks

• Search — Ctrl+F works across hundred-page scans.
• Copy & paste — pull quotes and figures out of paper documents.
• Conversion — once a scan has a text layer, PDF to Word can produce an editable document, and PDF to Text can extract everything as plain text.
• Accessibility & archiving — searchable PDFs are the standard for digital archives.

Getting the best results

• Scan at 150–300 DPI — higher adds nothing but file size.
• Keep pages straight; heavy skew lowers accuracy.
• Pages that already contain digital text are passed through untouched, so it's safe to OCR mixed documents.

Frequently asked

Does it change how my document looks? No — the page images stay exactly as scanned; the text layer is invisible.

How long does it take? A few seconds per page. A 20-page scan typically finishes well under a minute.

Is it really free? Yes — like every tool on PDFHub. Files delete automatically after 24 hours.