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Universal Mod CoreMinecraft mod for 1.21.1

A minecraft/loader agnostic modding API

client and servernewest supported 1.21.1
Latest version
1.21.1-neoforge-1.3.0-hotfix5
Minecraft
1.7.10 to 1.21.1
Java
Java 21+
Loaders
NeoForge, Forge
Licence
LGPL-2.1-only
Downloads
175.2k
Updated
11 d ago
Available on
Modrinth
Space NodeOur hosting

Host Universal Mod Core servers

One click and Universal Mod Core is installed with the right loader, on hardware built for it.

  • 1.21.1
  • NeoForge
  • Forge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version Universal Mod Core declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1NeoForge, Forge21+declared8 Aug 2024
1.20.1NeoForge, Forge17+declared12 Jun 2023
1.19.4Forge, NeoForge17+declared14 Mar 2023
1.18.2NeoForge, Forge17+declared28 Feb 2022
1.17.1NeoForge, Forge16+declared6 Jul 2021
1.16.5Forge, NeoForge8+declared14 Jan 2021
1.15.2NeoForge, Forge8+declared17 Jan 2020
1.14.4Forge, NeoForge8+declared19 Jul 2019
1.12.2Forge, NeoForge8+declared18 Sept 2017
1.11.2NeoForge, Forge8+declared21 Dec 2016
1.10.2NeoForge, Forge8+declared23 Jun 2016
1.7.10Forge, NeoForge8+declared14 May 2014

Download

From Universal Mod Core’s own host. Nothing is re-hosted here.

All 44 releases
1.21.1-neoforge-1.3.0-hotfix5release25 Jul 2026

UniversalModCore-1.21.1-neoforge-1.3.0-hotfix5.jar · 0.8 MB · for 1.21.1

Download latest
235735e2dc8d…
Older versions24
  • 1.7.10-forge-1.3.0-hotfix49 Jul 20261.7.101.5 MB288 downloads9f648a215aa1…Get
  • 1.7.10-forge-1.3.0-hotfix33 Jul 20261.7.101.5 MB70 downloads8c951140898b…Get
  • 1.15.2-forge-1.3.0-hotfix230 Jun 20261.15.22.3 MB27 downloadsf935727f3ed0…Get
  • 1.14.4-forge-1.3.0-hotfix230 Jun 20261.14.42.3 MB22 downloadsad3e176874e9…Get
  • 1.12.2-forge-1.3.0-hotfix230 Jun 20261.12.21.5 MB2.0k downloadsa273d09ac934…Get
  • 1.11.2-forge-1.3.0-hotfix230 Jun 20261.11.21.5 MB14 downloads7cd15d6619b4…Get
  • 1.10.2-forge-1.3.0-hotfix230 Jun 20261.10.21.5 MB21 downloadscc0b83a38d87…Get
  • 1.7.10-forge-1.3.0-hotfix230 Jun 20261.7.101.5 MB61 downloads027151ee3521…Get
  • 1.21.1-neoforge-1.3.0-hotfix129 Jun 20261.21.10.8 MB805 downloadsbaf3d91864ed…Get
  • 1.21.1-neoforge-1.3.027 Jun 20261.21.10.8 MB1.1k downloads936c61c938cc…Get
  • 1.20.1-forge-1.3.027 Jun 20261.20.12.5 MB3.5k downloads5e652517c7ec…Get
  • 1.19.4-forge-1.3.027 Jun 20261.19.42.5 MB84 downloadsf5ac00db5335…Get
  • 1.18.2-forge-1.3.027 Jun 20261.18.22.5 MB184 downloadsee1834bb9aa9…Get
  • 1.17.1-forge-1.3.027 Jun 20261.17.12.4 MB62 downloads1f528524a9be…Get
  • 1.16.5-forge-1.3.027 Jun 20261.16.52.4 MB971 downloadsfeb8c08b7338…Get
  • 1.15.2-forge-1.3.027 Jun 20261.15.22.3 MB15 downloads496b3c806706…Get
  • 1.14.4-forge-1.3.027 Jun 20261.14.42.3 MB30 downloadsc63a9c5bd5a6…Get
  • 1.12.2-forge-1.3.027 Jun 20261.12.21.5 MB1.2k downloads9c82b93986f9…Get
  • 1.11.2-forge-1.3.027 Jun 20261.11.21.5 MB17 downloads740b5269ec81…Get
  • 1.10.2-forge-1.3.027 Jun 20261.10.21.5 MB30 downloads0d1a3ff10577…Get
  • 1.7.10-forge-1.3.027 Jun 20261.7.101.5 MB212 downloads7152a79b132c…Get
  • 1.16.5-forge-1.2.29 Oct 20251.16.51.3 MB5.8k downloads772fba825ce0…Get
  • 1.15.2-forge-1.2.29 Oct 20251.15.21.1 MB193 downloads5d3277cc8b80…Get
  • 1.14.4-forge-1.2.29 Oct 20251.14.41.1 MB173 downloadscfd988fe021f…Get

Frequently asked

Does Universal Mod Core work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Universal Mod Core declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does Universal Mod Core support?

Everything the author has declared, from 1.7.10 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Universal Mod Core on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does Universal Mod Core support?

NeoForge, Forge. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Universal Mod Core?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the mod itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is Universal Mod Core under?

LGPL-2.1-only, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install Universal Mod Core?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download Universal Mod Core safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

BookshelfAn open source library for other mods!GeckoLibA 3D animation library for entities, blocks, items, armor, and more!Cloth Config API (Fabric/Forge/NeoForge)Config Screen API for MinecraftJourneyMapReal-time map used for mapping in-game or your browser as you explore.Architectury APIAn intermediary api aimed to ease developing multiplatform mods.Enchantment DescriptionsAdds in-game descriptions for enchantments to tooltips.

Last checked 10 d ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .