(Note that exporting requires the full version of CraftStudio.)
You can export static models in the OBJ file format from CraftStudio by typing
/export obj in the model editor's chat. To export the texture as PNG, type
CraftStudio also has a custom JSON-based model and animation format that's easy to read in a text editor and can be used as an intermediary format to convert to other engines.
To export a JSON model, type
/export json model. To export the currently active animation, type
/export json animation.