The birth of this little side project is because I need to adjust the Live2D Web SDK model with my own hands. But I can't change it without lots of data. So I think maybe building a site that could make me drag body points, and will return a JSON about the pose I adjusted might be a good idea.
Demo: https://2d-draggable-body-keypoints.sunyubro.com
First, dragging body points to whatever you want them to.
Second, we could check if the body points we've set are in the correct location via the top left window.
Finally, we could click the copy button once the pose is good for you.