OfflineSkins Mod 1.13.2/1.12.2 allows you to show off your skins even if the server is in offline mode. (Made it possible to cache your skins for offline use.)
In case of your normal skin doesn?t load, you can add your/others skin in the generated folder (.minecraft/cachedImages/skins), named after your username and ends with .png. This way the mod will use the provided file to load a skin for your/others character.
Crafatar (crafatar.com) will also be used to provide skins when normal skin doesn?t load. (This can be turned off)
You can also configure it to use a custom skin server through config.
High-resolution skins are supported.
This mod is Client-Only, you don?t need to install on the server.