ModsJava
PolyLib
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.
"PolyLib," developed by CreeperHost Ltd., is a compact Minecraft library mod focused on providing a collection of helper classes. These classes are designed to simplify various aspects of mod development, offering tools for easier GUI creation and other development enhancements to improve efficiency and user experience.
PolyLib WAS built using Architectury and is available for NeoForge, Forge, and Fabric, As of Minecraft 26.1.2 Architectury is no longer required.
PolyLib is Open source and available on Github.
Mods that require PolyLib
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.11, 1.21.9, 1.21.10
- 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 CurseForge — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — see the MC Java Mods guides for the full walkthrough.
Verified by MCModsHub
- Ships as polylib-forge-1200.0.2-build.84.jar — drop this file into the mods folder
- Download size: 707 KB
- Download link checked 8 Sept 2026 — working
These come from our own check of the pack file, not from the source page.