For some bizarre reason, vanilla Minecraft has absolutely no capes. That’s a problem that one modder wanted to fix. So that’s exactly what cjz did with the Minecraft Capes mod.
The Minecraft Capes mod adds the ability to wear capes into the game. The only restriction is that other people also need to have installed the mod in order to view the cape.
The mod comes with a number of default capes. However, players can also use any of their own .jpg files as a cape and then upload that cape to an online account. Full details about the online account can be found in the official Minecraft capes forum thread, but the account is free and takes only 10 seconds to sign up.
After creating the account, players can turn their capes on or off with a click of a checkbox. The account also allows you to create a new cape or choose a default .jpg from the gallery. Whether your friends use the Minecraft Capes mod or not, you’ll be able to see the cape as it billows behind you. And that’s what’s important.
How to install Minecraft Capes for Minecraft 1.6.4/1.7.2/1.7.4/1.7.5
Step 1) Download and install Minecraft Forge
Step 2) Download the Capes mod from here
Step 3) Drag and drop the files into the minecraft.jar folder
Step 4) Sign up for an account at MCCapes.com by entering your Minecraft username at the top of the page
Step 5) Upload a cape design of your own via .jpg or choose a cape from the gallery
Step 6) Start playing and enjoy!