Signed skin properties

Minecraft profiles carry a textures property. Its value is Base64-encoded JSON. Its signature authenticates that value.

What the property contains

The decoded data can include a skin URL, model metadata, and a cape URL. A skin texture URL identifies an image on Minecraft's texture service.

A texture hash is the identifier at the end of that URL. It is not a player UUID or a saved SkinsRestorer custom name.

Why a PNG needs generation

A local PNG does not contain a signed profile property. A generation service uploads the image and returns the property that a server can apply.

Changing the encoded value without a matching signature makes the signature invalid. Keep the value and signature together when storing or transferring a property.

Model and cape

Classic and slim use different arm layouts. The image and model metadata must agree.

A cape belongs to the complete profile property. Copying an account property can copy its equipped cape. The website can also generate supported cape combinations through its cape-aware route.

Showing that property on a server does not transfer account ownership of a cape.

Next

Upload an image, or fetch and apply a property through the API.