I was wondering if anyone knows of a way to make this with HTML and css only. I was hoping to use this on my laptop without installing a local server and such. It seems like it needs this right now to save/export the resulting sheet correctly. Perhaps I am going about this wrong? 

I have also been trying to increase the spritebox size, to make a giant type creature also. This went okay and it is 200 x 200 px. 

I have found details on previewing the spritesheet using css only, but am not sure how the option selecting system could work.