A lightweight API-first tool to convert NDS save files (.sav) to and from the DeSmuME format (.dsv).
First, you need a save file, either of the two formats will work.
Then, you can just use curl:
curl http://localhost:3000 -F file=@savefile.sav > savefile.dsv
The conversion works both ways.
curl http://localhost:3000 -F file=@savefile.dsv > savefile.sav