Is it safe to OCR my PDF files online?

Yes. AziPDF runs OCR entirely in your browser using Tesseract.js. Your files are never uploaded to any server — everything happens locally on your device, so your documents stay 100% private.

What is OCR and what does it do to my PDF?

OCR (Optical Character Recognition) reads text from scanned or image-based PDFs and adds an invisible searchable text layer. The original appearance is fully preserved — you get the same-looking PDF but with text you can now select, search, and copy.

Which languages does AziPDF OCR support?

AziPDF OCR supports 100+ languages including English, Hindi, Arabic, Chinese, French, German, Spanish, Japanese, Korean, and many more. You can select up to 3 languages per conversion for mixed-language documents.

Will OCR change how my PDF looks?

No. OCR only adds an invisible text layer beneath your original content. The visual layout, images, fonts, and colors are completely unchanged.

Can I OCR multiple PDF files at once?

Yes. Upload multiple PDFs and they will all be processed. If you upload more than one file, the results are packaged as a ZIP archive for download.

How accurate is the OCR text recognition?

Accuracy depends on the quality of the original scan. Clean, high-resolution scans achieve near-perfect results. AziPDF applies preprocessing (unsharp masking, Otsu thresholding) to improve accuracy before OCR runs.

Do I need to sign up or pay to use OCR PDF?

No. AziPDF OCR is 100% free with no account, subscription, daily limits, or watermarks required.

What types of PDFs work best with OCR?

Scanned documents, books, invoices, receipts, and any image-based PDF benefit most from OCR. If your PDF already has selectable text, OCR is not needed — but running it anyway is harmless.

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Make scanned PDFs searchable with 100+ language support.

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OCR PDF Online Free – Make Scanned PDFs Searchable

OCRPDF

OCR PDF Online Free – Make Scanned PDFs Searchable

OCRPDF