Hello @bitrocker2020. The JSON generator mentioned in the reference link is the nextgen version of the tool and it is also not a free to use tool. The link that I have provided is the most used and the stable version of it. You will be able to see the difference in the links both my hunt and previous hunt has.

The previous hunt also doesn't talk much about the features of the tool. The image in the previous hunt is also incorrect and refers someone else as creators.