Does anyone know a way how to convert an OBJ model to json so that you can use it in minecraft?
Take a look at the description of the json format…
https://de.wikipedia.org/...t_Notation
I don't read anything there that has anything to do with 3D model data.
With Minecraft you can use custom models in resource packs and that only works with .json files.
Then you have to get a description of the manufacturer and write a converter. It's not a common 3D format.