What image formats does the OCR support?

GoChronos OCR supports JPEG, PNG, WebP, BMP and GIF image files, as well as PDF documents.

Is my document uploaded to a server?

No. All OCR processing runs entirely in your browser using Tesseract.js (WebAssembly). Your documents never leave your device and are never stored, transmitted or processed on any server.

How many languages does the OCR support?

40+ languages including English, French, German, Spanish, Portuguese, Arabic, Hindi, Chinese (Simplified & Traditional), Japanese, Korean and Russian.

How accurate is browser-based OCR?

High-resolution scans with good contrast typically achieve 95%+ accuracy for printed text. Handwriting, low contrast or unusual fonts will reduce accuracy.

Can I extract text from a scanned PDF?

Yes. Upload your scanned PDF and the tool processes each page locally. For digital (text-selectable) PDFs, the PDF Text Extractor is faster and more accurate.

Image to Text (OCR) Free — Extract Text On-Device

Extract text from images and PDFs with on-device OCR in 100+ languages — export TXT, DOCX, PDF and more. No upload, free.