The last time the developer responded was 167 days ago. Is this project still active? If not please tell us rxi so we know no future support or updates will be included.
The developer could call this out clearly if it was his plan. Tho the tool itself is a good start but the lack of export to usefull formats makes it kinda only partly usefull since you will have to write a converter to target format from his specific format. I did so for godot but was quite a pain and rn im considering writing a tool myself that directly exports to such a format instead of havin a secondary format inbetween that i have to interpret and convert to the target. But ye i gave up on it anyway long time ago
The JSON export from TileKit was one of the easiest to implement.
If your engine does support JSON, you are fine. And loading sprites and images also works fine. And with 2 nested loops, it works. I guess, something like ChatGPT could come up with an loader for that, if you only give it a JSON. (I am not sure, didn't tried)
The rules are working, the tiles are working, we can create also objects. And I guess, the next bigger step would be to use LDtk instead. I myself found it a bit to complecate to start with and love my TileKit. It also supports Spriteanimations. What I could miss, are multilayer, but for that I guess, you could use "Tiled".
I want to use TileKit for 3D maps. And it also works. (work in progress, screenshots are not final)