Is my image uploaded to a server?

No. Tesseract.js runs entirely in your browser. Your images are processed locally on your device and never transmitted to any server. This makes the tool suitable for sensitive documents.

What languages are supported?

12 languages: English, Spanish, French, German, Italian, Portuguese, Dutch, Polish, Russian, Chinese (Simplified), Japanese, and Korean. Each language requires its own model file (downloaded once and cached).

How accurate is the OCR?

For clean printed text in good lighting, accuracy exceeds 95%. For photographed documents with shadows, creases, or low resolution, accuracy drops to 70-85%. Handwriting recognition is not supported — Tesseract is designed for printed text.

How to Extract Text from Images with Free OCR (2026)

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