Most of OCRs in Farsi are framework-dependent and not free. Is there any OCR in Farsi that is under web and free?
Tooska Farsi OCR is a web-based OCR, which uses modern learning techniques to boost accuracy on the Farsi language (Disclaimer: I'm on Tooska's development team).
Farsi is a cursive language which adds much complexity for its recognition, therefore there are few OCR software that have appropriate accuracy. Moreover most OCR systems are desktop based.