Connecting excel data to looker explores

[SSaini]

Hi Looker users, 

I am trying to find if there is a way to add Excel file table into Looker explores, so that I can use Excel columns in my looker dashboard for analysis. 
The solution suggested to me is to add that excel table to Data warehouse and then access in looker, but it will be a manual process for me. 

Does anyone know any other way to connect excel data to looker? 

Thanks in advance.