OCR for PDF: How to Extract Text from Scanned Documents

A scanned PDF is just an image — it looks like text but has no actual selectable or searchable text. OCR (Optical Character Recognition) is the technology that reads those images and converts them into real, usable text.

How OCR Works

OCR software analyzes each pixel of a scanned image and identifies patterns that match characters in a given alphabet or language. Modern OCR achieves 95%+ accuracy on clean, high-resolution scans.

When You Need OCR

• You can't select or copy text from a PDF (it's image-based)
• The PDF doesn't show up in search results when you Ctrl+F
• You received a scanned contract or form and need to edit or extract data

How to OCR a PDF Online

1. Open the [OCR PDF](/tools/ocr) tool.
2. Upload your scanned PDF.
3. Select the document language (for best accuracy).
4. Click Process.
5. Download the searchable PDF or extracted text file.

Tips for Better OCR Accuracy

• Use high-resolution scans — 300 DPI is the minimum for good accuracy.
• Scan in grayscale or color — Black and white scans lose detail.
• Deskew your scans — Tilted pages dramatically reduce accuracy.
• Choose the right language — OCR models are language-specific.

After OCR: What to Do Next

• Make the PDF searchable — The OCR output is a PDF where text can be selected and copied.
• Convert to Word — Use [PDF to Word](/tools/pdf-to-word) on the OCR output for a fully editable document.