Demo of external website embedding the editor
What you can try so far:
Switch between FRONT, BACK, RIGHT, LEFT
Upload image(s) and drag to adjust the placement
The first two uploaded images in the FRONT will be masked with big "A" and "B" letters
Embedding this editor into an iframe with src=https://elfan.net/editor/embed.html inside your website
I will keep adding more features, please come back again later. Feedback can be addressed to elfan@live.com