OCR PDF
Make a scanned or image-only PDF searchable, selectable, and copyable.
Why run OCR on scanned PDF documents?
Physical document scanners, smartphone camera scanning apps, and desktop copiers output PDF files containing flat raster image pixels. Without Optical Character Recognition (OCR), scanned PDF documents present severe usability limitations:
- No Searchability (Ctrl+F Disabled): You cannot search for names, invoice numbers, dates, or keywords inside the PDF.
- No Text Copy-Pasting: Selecting and highlighting text to copy quotes or tables into Word documents or spreadsheets is impossible.
- Incompatible with Screen Readers: Visually impaired users relying on text-to-speech accessibility tools cannot read scanned image pages.
- Indexed Search Failure: Desktop search engines (Windows Search, Mac Spotlight) cannot index scanned PDF contents.
Invisible text layer bounding boxes (Opacity: 0)
ToolJiffy uses a sophisticated invisible text overlay technique:
Using tesseract.js in client-side WebAssembly, ToolJiffy detects word character bounding boxes (X/Y coordinates and dimensions) across every page canvas.
It then uses pdf-lib to draw an opacity: 0 text layer directly over the original page image. The PDF looks 100% identical to your original scan, but text becomes fully highlightable, selectable, and searchable.
Client-side security for sensitive contracts & financial records
Uploading private tax returns, medical records, bank statements, or identity cards to third-party cloud OCR servers creates severe data breach risks under GDPR and CCPA regulations.
ToolJiffy operates on a zero-cloud architecture. By leveraging WebAssembly and client-side JavaScript, character recognition and document compilation run 100% locally in your browser memory. Your documents never touch external cloud servers.
Step-by-step guide to making scanned PDFs searchable
- Upload your scanned PDF: Drag & drop any scanned or image-based PDF above.
- Select language: Choose the document's primary language (English, Hindi, Spanish, etc.).
- Process & Download: ToolJiffy automatically runs Tesseract OCR and downloads your searchable PDF file.
Frequently Asked Questions
How do I perform OCR on a scanned PDF online for free?
Upload your scanned PDF document above. Select the document language (e.g. English, Hindi, Spanish, French, German). ToolJiffy runs Tesseract OCR directly inside your browser memory and stamps an invisible, searchable text layer onto your PDF.Is my scanned PDF file uploaded to any external server during OCR?
No, 100% private. All Optical Character Recognition (OCR) and PDF page compilation run locally in your browser using WebAssembly, Tesseract.js, and pdf-lib. Your private documents never touch external cloud servers.Will OCR processing alter the original visual look of my scanned pages?
No. The visible page image remains 100% identical to your original scan. ToolJiffy embeds an invisible (opacity: 0) text layer aligned perfectly with the scanned words, enabling Ctrl+F search, selection, and copy-pasting.What OCR languages are supported?
ToolJiffy supports English (eng), Hindi (hin), Spanish (spa), French (fra), German (deu), Portuguese (por), Italian (ita), and Arabic (ara).Why is OCR important for scanned receipts, legal documents, and contracts?
Scanned paper PDFs are flat raster images that cannot be searched or copied. OCR makes document text searchable across desktop file systems (Windows Search / Mac Spotlight) and document management systems.How accurate is the OCR text recognition?
Recognition accuracy depends on scan resolution and lighting. Clean 300 DPI scans yield near 99% accuracy. For best results, select the matching document language in the dropdown.Can I perform OCR on password-protected PDF files?
Encrypted PDFs must be unlocked first using our PDF Unlock tool before running OCR.Is ToolJiffy OCR PDF free to use without limits or watermarks?
Yes! ToolJiffy is 100% free with unlimited usage, zero account registrations, and zero watermarks added to your OCR PDF.