I've been using your maps for a long time now, both as a dungeon master and as a developer for testing our team's tabletop map projection software Infinite Realms.
I recently implemented support for the Universal VTT file format in our app and was wondering if you would be interested in this as well for this generator. UVTT supports light, grid and wall placement information and more. The information is in JSON format and the map image is a base64 encoded string in the same file.
The format is supported by a growing number of map generators and VTTs, so it may be worth a look... ;)
Arkenforge has posted a blog post on the specs, along with a demo file here: https://arkenforge.com/universal-vtt-files/