OCR PDF
Extract text from scanned PDFs and images using optical character recognition.
How to Extract Text from Scanned PDF
Scanned documents contain images of text that cannot be searched, copied, or edited. OCR (Optical Character Recognition) extracts the text from these images, turning paper documents into digital, searchable, editable text files. Our free online OCR tool makes digitizing books, records, and documents simple without any software installation.
The tool uses Tesseract.js OCR engine running entirely in the browser to recognize English text characters from scanned PDFs and images. Each page is processed individually to identify characters and preserve their reading order. The extracted text is delivered as a plain text file you can copy, edit, and use anywhere.
For best results, ensure your scans are clear, well-lit, and use standard fonts with high contrast between text and background. Text that is sharp and properly aligned produces the best recognition accuracy. Scanned documents at 300 DPI or higher produce the best OCR results.
Common Uses for OCR Technology
Researchers digitize academic papers, historical documents, and reference materials for text analysis, search, and citation. Instead of manually reading and typing notes, OCR extracts all the text for digital search and organization. Legal professionals convert scanned contracts and case documents into searchable text for efficient document review and discovery.
Businesses digitize paper invoices, receipts, and forms for digital record keeping and data entry automation. OCR eliminates manual data entry, reducing errors and saving countless hours. Accountants digitize paper financial records and tax documents for digital filing and easy retrieval.
Students convert scanned textbook pages and lecture notes into editable text for easier studying, note taking, and search. Archivists and librarians preserve historical documents by converting them to searchable digital formats for future generations. Anyone with a stack of paper documents that need to be digitized can use OCR to save hours of manual typing.
OCR Accuracy Tips
Scan quality directly affects OCR accuracy. Use clean, high-resolution scans at 300 DPI or higher for best results. Ensure the document is flat and properly aligned in the scanner. Crooked pages or curled paper can reduce recognition accuracy significantly.
Font choice matters for OCR accuracy. Clean, standard fonts like Arial, Times New Roman, and Courier are recognized with highest accuracy. Ornate, handwritten, or decorative fonts may have lower recognition rates. High contrast between text and background colors also improves accuracy.
After OCR processing, review the extracted text for any errors. Common OCR mistakes include confusing similar characters like O and 0, I and l, or S and 5. Correct these errors before using the text in important documents. The extracted text provides a strong starting point that saves significant time compared to manual typing.
Security & Privacy
Files are transferred over HTTPS, and output links expire after the configured download window. Your documents and extracted text are not shared with third parties or stored permanently. Your document privacy is handled with care.
Frequently Asked Questions
What languages does OCR support?
Currently English is supported for text recognition. The tool uses Tesseract.js which has multilingual capabilities for future expansion to other languages.
How accurate is the OCR?
Accuracy depends on scan quality. Clear, well-lit scans with standard fonts at 300 DPI or higher produce the best results with over 95% accuracy for clean documents.
Can I OCR images as well as PDFs?
Yes, the tool supports both PDF files and common image formats including JPG and PNG for OCR text extraction processing.
Can I use the extracted text in Word or Excel?
Yes, copy the extracted text and use our Word to PDF or PDF to Excel tools for further conversion into editable document formats.
Can I OCR a handwritten document?
Currently the tool is optimized for printed text recognition. Handwritten text recognition has lower accuracy and is not recommended for important documents.
Is OCR free to use?
Yes, OCR text extraction is free for basic use. No registration or software installation is required for basic use.