Demo ASP.NET web interface that uses the free OCR.Space OCR API. The web interface is exactly of what we are using at https://ocr.space/
The call to the OCR API can be found inside the "sripts/jquery-ocr-starter.js" file. Insert your API KEY at line 597:
License: MIT License, see https://opensource.org/licenses/MIT