Install Krypton in 9 steps

Install Minecraft 1.21.11 (Java Edition)

Open the official Minecraft Launcher, click Installations → New Installation, pick version 1.21.11 (Release), then launch it once so the version files are generated.

Download & install Fabric Loader

Head to the official Fabric site and grab the installer. Run it, select Minecraft version 1.21.11, Loader version latest, then click Install. A new profile named 'fabric-loader-1.21.11' will appear in your launcher.

Locate your mods folder

Open the folder where Minecraft stores your mods. If it doesn't exist yet, create a folder named 'mods' inside your .minecraft directory.

Windows:  %appdata%\.minecraft\mods
macOS:    ~/Library/Application Support/minecraft/mods
Linux:    ~/.minecraft/mods

Install Fabric API

Fabric API is the core library every Fabric mod depends on. Download the 1.21.11 build and drop the .jar file into your mods folder.

Install Cloth Config

Cloth Config powers Krypton's in-game settings menu. Download the Fabric 1.21.11 build and place it in your mods folder alongside Fabric API.

Install Fabric Language Kotlin

Some of Krypton's modules are written in Kotlin, so this runtime is required. Grab the latest 1.21.11 build and drop it in your mods folder.

Download Krypton.jar

Now grab the Krypton client itself and add it to the same mods folder.

Launch Minecraft with the Fabric profile

In the Minecraft Launcher, open the Installations tab and click Play on 'fabric-loader-1.21.11'. Wait for the game to load — Krypton will inject automatically.

Open Krypton in-game

Join any world or server (like DonutSMP), then press Right Shift to open the ClickGUI. Toggle any of the 80+ modules and configure them to your liking. That's it — you're ready to play.