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Searchable PDF

OCR PDF Online Free

Use OCR PDF when a PDF is mostly a scan or photo and normal text selection does not work.

QuickerConvert keeps the visible page image and adds selectable text to a new copy for supported files, so scanned certificates, notes, letters, receipts, and report pages become easier to search and review.

What this tool helps with

  • Recognize text on scanned PDF pages
  • Add a searchable text layer
  • Keep the visible page image
  • Download a new searchable PDF copy

Supported formats

  • Input: scanned or image-only PDF pages supported by the browser OCR workflow.
  • Output: a new searchable PDF copy with the original page image and an added text layer.
  • Best results come from clear, upright scans with readable printed text.

Best for

  • Scanned certificates and letters
  • Receipts, forms, and paperwork images
  • Study notes and archived report pages
  • Preparing scanned PDFs for search and review

Limits to know

  • OCR accuracy depends on scan quality, language, rotation, handwriting, shadows, and page layout.
  • Complex tables, stamps, handwriting, and low-resolution photos may need manual review.
  • Very large or unusual PDFs can be limited by browser memory and device speed.

How it works

  1. Open the OCR PDF workspace.
  2. Add the scanned or image-only PDF.
  3. Choose the recognition detail and create a searchable copy.
  4. Download the new PDF and test search or text selection before sharing.

Open OCR PDF or browse all PDF tools.

Processing and original-file safety

PDF pages are rendered for recognition in the browser, then a new PDF preserves the visible source pages and adds a searchable text layer.

The original scan stays unchanged. Keep it for visual verification because OCR text can contain recognition mistakes.

Tested limits and output tradeoffs

Enforced limits

  • One PDF up to 100 MB and 75 pages can enter a run; a warning appears from 20 pages.
  • OCR is limited to 40 megapixels per rendered page and 200 megapixels total, with a warning from 80 megapixels.

What the output may change

  • Recognition accuracy depends on the detected writing system, scan resolution, rotation, handwriting, shadows, columns, and unusual fonts.
  • The searchable layer helps search and selection but is not a substitute for proofreading names, amounts, dates, or legal text.

First-party QA note

Reviewed 2026-07-19: First-party automated QA verified the 75-page, 40-megapixel-per-page, and 200-megapixel-total ceilings, including exact boundary acceptance and one-over rejection.

Automated OCR workload tests plus lazy-engine and cancellation regression checks.

Troubleshooting

  • Use Balanced quality or split the PDF when the pixel ceiling is reached.
  • Rotate sideways pages and improve dark, skewed, or low-resolution scans before OCR.
  • Compare important recognized text against the original page image before archiving or sharing.

Desktop and phone notes

  • OCR loads its detector and the matching pinned script model only after recognition starts; model downloads and recognition can use significant phone memory.
  • Keep the tab open; cancellation stops rendering and recognition without changing the original PDF.

Related practical guides and tests

These QuickerConvert articles explain the closest workflow, measured limit, or output tradeoff for this tool.

Common questions

When should I use OCR PDF?

Use OCR PDF when a PDF page looks like a scan or photo and normal text selection does not work.

How accurate is OCR?

OCR results depend on scan quality, rotation, language, shadows, handwriting, and layout. Review the searchable copy before relying on it.

Does OCR change my original PDF?

No. QuickerConvert creates a new searchable PDF copy and keeps the original file unchanged.

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