The output file is pure JSON, and I tried to make it legible and easy to parse for quick use cases. So it should be quite simple for any game dev out there with basic parser knowledge to make its own importer. But at some point, I plan to try to have a proper "official" importers for major engines, to make devs life even easier.
Curious to hear if you think there'd be value in a lossy conversion to Tiled XML/JSON as well. It might help with adoption if developers can take advantage of existing loaders, even if it's not perfect.
That said, I don't know what the amount of work would be, especially if the two formats make different decisions on how to do things.