Xls To Json
here is video on how to convert Excel Xls file To Json :
If you want to automate conversion or avoid user Interface (UI) and run "Xls To Json" application from command line - here is an example of how to do it:
"C:\Program Files (x86)\WhiterockSoftware\XlsToJson\XlsToJson.exe" inputfile.xls outputfile.json