Easy way to get spreadsheet data to auto create and assign CRM lead

Easy way to get spreadsheet data to auto create and assign CRM lead

I am looking for a way to create an "easy button" or a very simple way to convert a spreadsheet to a lead in Zoho CRM without going through the import process. A file is downloaded from a 3rd party site and I need an easy way to convert the excel spreadsheet to leads. Is there a way to create a custom function to do this?