Edit csv is a very handy tool if you need to make some basic edits to a CSV file on a computer without a nice editor installed. You can upload your CSV (or create it directly on the web), do edits, additions, removals etc. and download again without the format getting messed up.

For this reason it’s useful on computers that insist on opening CSVs in Microsoft Excel - Excel being a tool so bad at dealing with CSVs it forced scientists to rename some human genes just to stop them getting messed up in what for many people is their default CSV tool.