Open a terminal, run this:
sudo curl https://gist.githubusercontent.com/esthervillars/42b4c5d120c79faa7b65e0db5198c97d/raw/trello-parser.py -o /usr/local/bin/trelloparse && sudo chmod +x /usr/local/bin/trelloparse
$ trelloparse -h
usage: tp [-h] input output
positional arguments:
input JSON File from Trello
output File to output to
optional arguments:
-h, --help show this help message and exit
$ trelloparse ZRwW5Yyn.json output.json
To get the output in CSV format, use https://json-csv.com/