Extract data from passport photos. Read MRZ zones and personal information. Free and private.
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JPG · PNG · WebP · BMP · TIFF · PDF — up to 4 MB
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DoctorDocs offers 244 free OCR and document tools — all running privately in your browser.
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⭐ Leave a review on G2While basic OCR converts images to raw text, structured data extraction goes further by identifying and organizing specific fields within a document. For an invoice, this means recognizing the vendor name, invoice number, date, line items, and total amount. For a business card, it means separating the person's name from their title, company, phone number, and email address. This process combines OCR with pattern recognition and natural language processing (NLP) to understand not just what the text says but what each piece of text means.
Tables in scanned documents are particularly challenging because OCR engines must understand spatial relationships — which values belong to which columns and rows. DoctorDocs uses Tesseract's page segmentation analysis to detect table boundaries and cell structures before running text recognition. The extracted text preserves spatial alignment so that 'Patient Name' in the left column stays associated with 'John Smith' in the right column. For complex tables with merged cells or nested headers, minor manual formatting may be needed after extraction.
Business professionals use data extraction to digitize stacks of paper invoices for accounting software. Researchers extract data from printed tables in academic papers for analysis in Excel or Google Sheets. Healthcare administrators digitize patient intake forms. Real estate agents scan property documents. Students extract data from textbook tables for study guides. In each case, the goal is the same — turn paper-trapped information into digital data that can be searched, sorted, calculated, and shared.
For the highest accuracy when extracting structured data: use high-resolution scans (300 DPI minimum), ensure the document is straight and not skewed, remove staples or folds that obscure text, and use our image enhancement tools to boost contrast before processing. For receipts printed on thermal paper, scan them promptly — thermal prints degrade over time and may become unreadable after several months. Color documents should be photographed in natural light to avoid glare and color casts.
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