With this web based skin editor there's no need to install anything - just enter your player's username and you can edit your skin and upload it straight to Minecraft. Or use another player's skin as the basis for your own brand new skin.
Here is your new skin in 3D. If you're
happy with how it looks, then go ahead and save it.
You can then upload it to Minecraft or
else it will be available via your Skin History page, where
you could edit it further at a later date.
If you're not
happy with how it looks in 3D then press Cancel to return to
the editor and improve the look further.