Superseded by Entabulate.
Convert NDJson format data into CSV. Data is streamed, so files much bigger than the available memory can still be converted. Takes into account nested Json objects.
$ npm install -g ndjson-to-csv
Alternatively, don't install it and just prepend the command with npx.
$ ndjson-to-csv input.ndjson > output.csv
Where input.ndjson is your input data.