How often do you download a csv file and then have to manually remove or rename fields,
concatenate values, format phone numbers etc. before uploading the file to another program?
I can create a web or desktop app that automatically makes the changes you need. If the apps you
use have a good API I can even remove the download and upload steps.
Here I've created a toy example that lets you select fields you want to keep and those you want
to rename. For each you can then Reverse (reverse the order of the letters or numbers in
each cell), Concatenate (add '-' plus the row number to each cell), or leave them unchanged.
I can create a custom version for you that handles any formatting you need.