I am making a website to get to know aws and Django better. The idea is to let a user upload an excel file, convert it to csv and then let the user download the converted csv file. 
I am using amazon s3 for file storage. My question is, what is the best way to make the conversion? Is there any way to access the excel file once it is stored in the s3 bucket and convert it to csv via Django? Sorry if my question is silly but I haven’t been able to find much information on that online. Thanks in advance
On every put event of Bucket you can trigger a AWS Lambda function which will convert your File format and save in desired bucket location.
What is the best way to convert a file in amazon s3 with Django/python?