A scanned PDF often looks like a normal document, but the text may only exist as an image. OCR helps detect the words on the page so the PDF can become searchable and easier to copy, archive, or review.
When OCR is useful
OCR is useful for scanned certificates, letters, signed forms, statements, old contracts, and tender documents received as image-based PDFs. It helps you search for names, registration numbers, dates, and document headings.
Scan quality matters
OCR accuracy depends on the quality of the scan. Clear contrast, straight pages, readable text, and enough resolution help the OCR engine detect words more accurately. Blurry, skewed, or dark scans may need cleanup first.
Check sensitive documents carefully
After OCR, search for important names, numbers, and dates to confirm the result. OCR can make mistakes, especially on stamps, handwriting, faded scans, and tightly spaced tables.
Quick checklist
- Use a clear scan
- Rotate pages before OCR
- Use scanner cleanup for dark or noisy pages
- Check names, dates, and numbers after OCR
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