ModsJava
QuLib
I don't know my version or loader
Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.
No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.
QuLib is a library mod providing utilities for developing mods:
- Utilities for doung Raycasts
- Utility methods for bridging different vector math utilities used in Minecraft's code
- Kotlin extensions for Joml and Minecraft math related classes
- Random extensions
- Nbt serialization for Joml
- Utilities regarding aim and spread calculations
Available for both Fabric and Forge requiring Fabric Language Kotlin and Kotlin For Forge respectively
In 1.18,2 this mod also packages two java libraries:
- Joml - vector math library
- Javaluator - expression evaluation library
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.19.4, 1.20, 1.20.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
Verified by MCModsHub
- Ships as qulib-kt-fabric-1.20.4-2.1.21.jar — drop this file into the mods folder
- Download size: 74 KB
- Download link checked 31 Aug 2026 — working
These come from our own check of the pack file, not from the source page.