[2019] Character export tool

Hi I'd like to create a little tool to be able to export characters from and to different computers. Even if later on multiplayer characters may answer current issue of playing on multiple devices, I'm currently stuck. :)

The tool would be open source and under MIT licence.
I understand that character saves may change at any time without notice, and may break both the tool and the ability to load a character from a previous version of the game.

My questions are :

• Does EHG allows it?
• Is there any documentation I can rely on to understand saves locations (Linux, OS X, Windows) and structure?

Thanks,
Bastien