How to apply ocr to a pdf for structured data extraction
- Step 1Upload the scanned PDF — Drop the document into the OCR tool.
- Step 2Apply OCR — Add the text layer to enable data extraction.
- Step 3Download the OCR-processed PDF — Save the PDF with the text layer.
- Step 4Proceed to structured data extraction — Use the PDF Table to JSON or PDF Form Extractor tool on the OCR-processed PDF.
Frequently asked questions
Should I apply OCR before or after other PDF processing steps?+
Apply OCR as the first step — before extraction, compression, or conversion. Subsequent tools require the text layer created by OCR.
What DPI should the scanned PDF be for best data extraction accuracy?+
300 DPI is the minimum recommended for accurate OCR of small text. Use 400-600 DPI for fine print or dense tabular data.
Can I integrate OCR into an automated document processing pipeline?+
Yes — use a cloud OCR API (AWS Textract, Azure Form Recognizer, Google Document AI) for automated at-scale OCR. This tool handles ad-hoc single-document processing.
Privacy first
All PDF processing runs locally in your browser using PDF-lib and pdf.js. No file is ever uploaded — only metadata counters are saved for signed-in dashboard stats.