The algorithm used for generating 3D models is from the following paper: Jun Mitani, "A Design Method for 3D Origami Based on Rotational Sweep", Computer-Aided Design and Applications, Vol.6, No.1, pp.69-79, 2009.(PDF)
This software has been tested on Chrome 103.
You are free to use this software for any purpose, including personal use, workshop use, and commercial product development.
I would be very happy if you respect the developer, cite the software appropriately, and report on your use cases to mitani@cs.tsukuba.ac.jp