Minecraft Java Skin -> Smash Skin
jam1garner for img2nutexb which is basically the backbone of this converter.
Check out his Twitter, Website, and Github Account!
Coolsonickirby for everything else (geting skin from mojang api + throwing it in my PHP backend)
I'd say check out my site, but you're already on it lmao. You can check out my YouTube Channel though!
Update: Thanks to jam, 64x32 skins and some other sizes work! Also it now automatically applies the gamma fix (also thanks to jam!)