Peasy or PCSE is a simple and free tool that generates polygonal hulls from transparent png images.
Peasy scans transparent png images, detects shapes – both concave and convex and generates a triangulated polygonal shell for them. These shapes can then be exported as JSON. Peasy also detects holes in found shapes as well.
You can download Peasy by clicking the button below or from itch.io – https://yadu.itch.io/peasy