Software: QGIS 3+Platform: AnyYou can add csv files to QGIS if the CS has an X and Y coordinate. This example comes from https://earthquake.usgs.gov/earthquakes/feed/v1.0/csv.phpOpen QGIS and go to the Data Source Manager ToolbarClick on the Open Data Source Managear icon:Once that opens, go to Delimted Text. Add your file. In this case I am adding the month summarization of all the earthquakes from the USGS. I know the file is comma delimited and that it has a Longitude (X) and Latitude (Y) field. I also know that the data is in EPSG:4326. You do need to know what projection your data is in and what fields it contains.Once it is set up click Add.Once you reach this point You’ll need to save this csv layer to a file.