Free Online Tool
Search Inside Scanned PDFs
Understand when PDF search works with scanned documents — and how to make any scanned PDF fully searchable.
Many PDFs are created by scanning physical documents. Whether you can search a scanned PDF depends on whether it has an embedded text layer. PDFSearch works instantly with any PDF that has searchable text — including OCR-processed scanned documents.
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How it works
- 01
Check if your scanned PDF has a text layer
Try opening your PDF in a browser and pressing Ctrl+F. If you can select text or Ctrl+F finds results, the PDF has a text layer and PDFSearch will work perfectly.
- 02
If text-selectable: search with PDFSearch
Upload your scanned PDF to PDFSearch and search as normal. PDFSearch extracts the text layer and searches it instantly, even for multi-page scanned documents.
- 03
If image-only: run OCR first
Upload your scanned PDF to Google Drive and open it with Google Docs — this applies free OCR. Or use Adobe Acrobat's 'Make Searchable' feature. Then download the resulting PDF with text layer.
- 04
Search the OCR-processed PDF
Once your scanned PDF has a text layer, upload it to PDFSearch and search normally. Results include page numbers and highlighted context.
Frequently asked questions
Why can't I search my scanned PDF?+
If your scanned PDF is an image file (no text layer), PDFSearch and other text search tools won't find any text. You need to first run OCR (Optical Character Recognition) to add a searchable text layer.
How do I know if my PDF is searchable or just an image?+
Open your PDF in a browser or PDF reader. If you can click to select text, or if Ctrl+F finds results, it has a text layer. If you can't select any text, it's image-only.
What is OCR and why do I need it for scanned PDFs?+
OCR (Optical Character Recognition) is technology that converts images of text into actual machine-readable text. Scanned documents are photos of pages — OCR reads those images and creates a text layer so search tools can find content.
Can PDFSearch search scanned PDFs with OCR text layers?+
Yes. If your scanned PDF has been OCR-processed and has a text layer, PDFSearch will search it perfectly — the same as any other PDF.
What is the best free OCR tool for scanned PDFs?+
Google Drive's built-in OCR (upload PDF → open with Google Docs) is free and works well for most documents. OCRmyPDF is a free command-line tool for batch processing. Adobe Acrobat has a paid 'Make Searchable PDF' feature with higher accuracy.
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