Skin

A skin refers to the texture that is placed onto a player model or mob.

The skin is divided into areas that act as the surface area of the character (For example, there's the front head area, left leg area, etc.). A skin will only allow solid color; transparency is not allowed on the skin file except on the second layer, which is transparent by default; playing offline, pixels can be left free resulting in "holes" in the skin. The second layer can be used to give the character glasses, hats, or other accessories (even a bigger head).

World textures
A skin can also refer to other textures in the game, such as block textures, item sprites, mob skins etc. A list of these can be found here.

It is worth noting that Pigmen, Zombie, and Zombie Pigmen mobs can use typical player skins (and vice-versa). Skeleton mobs can use typical player skins as well, but keep in mind that they have their skinny arms and legs. (If a skeleton mob skin is used as a player's skin, their legs and arms will not be skinny.)

In order to use the player skin for Pigmen, Zombie, and Zombie Pigmen, you must align it to the correct place on the .png or the texture will be broken.

PC
A player can only change their character's skin if they have purchased Minecraft. This is done on the Profile page by uploading a valid  image file, which will then replace the default skin.

Skins also have the option of having 3 or 4 pixel wide arms, which can be changed on the profile page as well.

The  and   files in minecraft.jar can also be changed and replaced via a resource pack, but the effects will only be visible to players using the resource pack, and will affect all players with the default skin.

Xbox 360 and PS3
There are currently 8 default skin types (with the exception of the skin packs) all of which appear to have Steve's face, but wearing different outfits and skin colors. The following are available through split screen and online only. The skins are available to be chosen in the 'Change Skin' area of Help & Options. The Xbox and PS3 (Playstation 3) allows transparent skins, because you can't create your own skins on the Xbox or PS3 edition. This prevents issues with completely transparent skin users "haunting" other players.

Default:

Skin Packs
Skin Packs are available in the Xbox 360 Edition as downloadable content. Skin Packs add additional skins that players may choose from along with the 8 default skins packaged with the game. They often feature characters from other video games (usually games on Xbox Arcade), alongside original designs. PlayStation 3 Edition currently only has three skin packs.

Skin Pack 1


Skin Pack 1 was released on July 16, 2012. It contains 45 different skins to choose from. It is purchasable through the Xbox 360 Marketplace or directly in-game through the Downloadable Content section and costs US$1.99. A trial version of Skin Pack 1 is available as a free download, which enables the full use of the original design skins, but not the skins based on copyrighted game characters which include those based on Minecraft's own characters.

Skin Pack 2


Skin Pack 2 was released on August 24, 2012. It contains 45 different skins to choose from. It is purchasable through the Xbox 360 Marketplace or directly in-game through the Downloadable Content section and costs US$1.99. A trial version of Skin Pack 2 is available as a free download, which enables the full use of the original design skins and some skins based on certain indie game characters.

Skin Pack 3


Skin Pack 3 was released on October 17, 2012. It contains 45 different skins to choose from, including figures from Valve's Half Life 2, Portal 2, and Left 4 Dead 2. It is purchasable through the Xbox 360 Marketplace or directly in-game through the Downloadable Content section and costs US$1.99. A trial version of Skin Pack 3 is available as a free download, which enables the full use of the original design skins and skins based on indie game characters.

Skin Pack 4


Skin Pack 4 was released on March 13, 2013. It contains 45 different skins to choose from. Some of these skins include capes. It is purchasable through the Xbox 360 Marketplace or directly in-game through the Downloadable Content section and costs US$1.99. A trial version of Skin Pack 4 is available as a free download, which enables the full use of some designs.

Skin Pack 5


Skin Pack 5 was released on July 31, 2013. It contains 45 different skins to choose from. It is purchasable through the Xbox 360 Marketplace or directly in-game through the Downloadable Content section and costs US$1.99. A trial version of Skin Pack 5 is available as a free download, which enables the full use of some designs.

Skin Pack 6
Skin Pack 6 was released on June 26, 2014. It contains 40 different skins to choose from. It is purchasable through the Xbox 360 Marketplace or directly in-game through the Downloadable Content section and costs US$1.99. A trial version of Skin Pack 5 is available as a free download, which enables the full use of some designs.

Summer Of Arcade Promotional Skin Pack


The Summer of Arcade Free Promotional Skin Pack was available through July 18 and August 22, 2012. It was available through the Xbox home page, and was free. It contained 15 different skins to choose from, all from popular games in the "Summer of Arcade" XBLA event.

Halloween Skin Pack


The Halloween Skin Pack was downloadable from October 26, 2012 to November 26th, 2012. It contained 55 different skins to choose from. 7 skins included capes. It was purchasable through the Xbox 360 Marketplace or directly in-game through the Downloadable Content section of the game and costs US$1.99. All proceeds went to charity.

Festive Skin Pack


The Festive Skin Pack was released on December 19, 2012 for Xbox and December 17, 2013 for PS3. It contains 24 different skins to choose from. 13 of the skins added extra pixels not available in the PC Version (ex. Santa's Hat). It is purchasable through the Xbox 360 Marketplace/Playstation Store or directly in-game through the Downloadable Content section of the game and costs US$1. A trial version of The Festive Skin Pack is available as a free download, which enables the full use of 7 of the designs.

Battle & Beasts Skin Pack


The Battle & Beasts Skin Pack was released on May 8, 2013. It contains 45 different skins to choose from. It is purchasable through the Xbox 360 Marketplace or directly in-game through the Downloadable Content section of the game and costs US$1.99. A trial version of The Battle & Beasts Skin Pack is available as a free download, which enables the full use of some of the designs. Each Battle Skin has a Male and Female Variation.

Minecraft 1st Birthday Skin Pack


The Minecraft 1st Birthday Skin Pack was available for a limited time, from May 9 until May 31, 2013. It contained 23 different skins to choose from. All the skins were original designs. It was available, for free, through the Xbox 360 Marketplace or directly in-game through the Downloadable Content section of the game. Note Herobrine underneath the "M" in Minecraft.

Battle & Beasts 2 Skin Pack


The Battle & Beasts 2 Skin Pack was released on October 9, 2013. It contains 45 different skins to choose from.

Marvel Avengers Skin Pack


The Marvel Avengers Skin Pack was released on December 23, 2013. It contains 35 different skins to choose from.

Marvel Spider-Man Skin Pack
The Marvel Spider-Man Skin Pack was released on April 30th, 2014.

Creating a skin
Many players want to have a new look, something which describes them. While you can always search the internet for a previously made skin, many players prefer to create their own.

A custom skin is a great way to personalize your player model and can be done either by using a variety of community-made skin editors, or by editing the "steve.png" file manually with an image editor like Photoshop, GIMP, Paint.net or similar image editors. The "steve.png" file can be downloaded from here. When editing the "steve.png" file manually, be sure to keep the original image dimensions and make the background of the skin (the unused pixels) completely transparent. Otherwise, Minecraft may fail to recognize the skin as intended.

Alternatively, some people find it easier to use a program, either downloadable or in-browser, which will allow them to have a live view of their character on a three dimensional model as they are editing the skin. For example, a program called Skincraft will further assist players by providing them with a wide variety of pre-made selections (such as hats, boots, sweaters, etc.), to give the skin creator exactly what they want, even if the creator has little to no artistic skill.

After making a custom skin, either by using a skin editor or by editing the "steve.png" file directly, one will still need to upload the .png file at the Profile page of www.minecraft.net before the skin is applied. Once completed, start up Minecraft and enjoy your new skin! Other players in multiplayer will also be able to see your skin. Note that you will not be able to see your custom skin if you are not logged in or if playing offline.

Note: the 1.8 templates can be used for pre-1.8 skins on the skin server. Only the top half of the image is used, e.g. not the individual arms and legs on the bottom, and no overlay on any layer except the head. If the skins is in resource pack for 1.7, you must use the old system exactly.

Prior to 1.8, there are approximately 2.29×1011,328 different unique skins. As of 1.8, there can be up to 3.06×1023,581 unique Minecraft skins.

Capes
Capes (previously known as cloaks) are vanity items and are worn in addition to the player's skin. There is currently no way to obtain a cape on one's own, however there are various client mods that allow players to obtain one, only visible client-sided. On the Xbox 360 Edition some skins from various skin packs, such as the Grim Reaper in the Halloween Pack and Ezio Auditore da Firenze in Skin Pack 4 have capes. Players on PC who legitimately have more than one cape can choose between which to wear by going to the mojang website.

Unused MineCon 2011 capes
These capes were featured in a poll where MineCon 2011 attendees could vote for their cape of choice. The red creeper cape won MineCon 2011, and the blue cape with the pickaxe was for MineCon 2012. These following capes are still unused though may appear in the future. The 3rd Minecon cape may have been based off of the green cape below.