Allows you to save a rig and rig animation to .json files.
To install, navigate to Blender's Edit > Preferences > Add-Ons > Install.
Install the save_rig.py file when prompted.
To use, make sure you're in object mode, and have already created an armature as well as attached it to a mesh.
Navigate to Object > Save Rig To Json and you're good to go.
Still very much in development, with hopefully new features being added as they're needed.