ModsJava
Universal Mod Core
Core Library for version agnostic Minecraft Mods. Free Minecraft Java mod for 1.21.1, 1.20.1, 1.19.4.
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.
Welcome to the Future
Universal Mod Core allows developers to build mods against a stable API that is Minecraft agnostic.
In the past UMC has been packaged directly with ImmersiveRailroading as it is was the only mod using it. Now that the API is reasonably stable, it can be published as it's own mod. This mod contains the logic for each Minecraft Version / Loader that it exposes in a simplified way to child mods.
TODO:
* Support for fabric
* Example project repo
* Contributing guide
Verified by MCModsHub
- Ships as UniversalModCore-1.12.2-forge-1.0.1.jar — drop this file into the mods folder
- Download size: 408 KB
- Download link checked 27 Aug 2026 — working
These come from our own check of the pack file, not from the source page.