Make scanned or image-based PDFs searchable and selectable. Powered by Tesseract.js — runs entirely in your browser across 100+ languages. No cloud API needed.
PDFZero uses Tesseract.js to run OCR (optical character recognition) on scanned or image-based PDFs, making the text inside them searchable and selectable — in over 100 languages including Hindi, Arabic, and Chinese. Everything runs locally in your browser; no cloud API or upload is involved.
Scanned documents are just images — you can't search, copy, or select text in them. Running OCR adds an invisible text layer so the document behaves like a normal digital PDF: searchable, copy-pasteable, and accessible to screen readers.
Accuracy depends on scan quality, font clarity, and language. Clean, well-lit scans typically recognize text very accurately; low-resolution or skewed scans may have more errors.
Over 100 languages, including Hindi, Arabic, Chinese, and most major world languages — select the right language for best results.
No. OCR runs entirely in your browser using Tesseract.js (WebAssembly), so even sensitive scanned documents stay local.
No, OCR adds an invisible text layer underneath the existing scanned image — the visual appearance of the PDF doesn't change.
No server-imposed limit, though OCR is computationally intensive, so very long documents will take more time depending on your device.