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OmniCoreMinecraft mod for 1.21.8

A library made to make creating multi-versioned mods significantly easier.

newest supported 1.21.8Library
Latest version
0.51.0+1.8.9-forge
Minecraft
1.8.9 to 1.21.8
Java
Java 21+
Loaders
NeoForge, Forge, Fabric
Licence
LGPL-3.0-or-later
Downloads
26.3k
Updated
12 mo ago
Available on
Modrinth
Space NodeOur hosting

Host OmniCore servers

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

  • 1.21.8
  • NeoForge
  • Forge
  • Fabric
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version OmniCore declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.8NeoForge, Forge, Fabric21+declared17 Jul 2025
1.21.7Fabric, NeoForge, Forge21+declared30 Jun 2025
1.21.6Forge, NeoForge, Fabric21+declared17 Jun 2025
1.21.5Forge, NeoForge, Fabric21+declared25 Mar 2025
1.21.4Fabric, NeoForge, Forge21+declared3 Dec 2024
1.21.3NeoForge, Forge, Fabric21+declared23 Oct 2024
1.21.2Fabric, NeoForge, Forge21+declared22 Oct 2024
1.21.1Forge, NeoForge, Fabric21+declared8 Aug 2024
1.21Forge, NeoForge, Fabric21+declared13 Jun 2024
1.20.6Forge, NeoForge, Fabric21+declared29 Apr 2024
1.20.4Forge, Fabric, NeoForge17+declared7 Dec 2023
1.20.2NeoForge, Forge, Fabric17+declared20 Sept 2023
1.20.1Fabric, NeoForge, Forge17+declared12 Jun 2023
1.19.4Forge, NeoForge, Fabric17+declared14 Mar 2023
1.19.3Forge, NeoForge, Fabric17+declared7 Dec 2022
1.19.2Forge, NeoForge, Fabric17+declared5 Aug 2022
1.18.2Forge, NeoForge, Fabric17+declared28 Feb 2022
1.17.1Forge, NeoForge, Fabric16+declared6 Jul 2021
1.16.5Forge, NeoForge, Fabric8+declared14 Jan 2021
1.12.2Forge, NeoForge, Fabric8+declared18 Sept 2017
1.8.9Forge, NeoForge, Fabric8+declared3 Dec 2015

Download

From OmniCore’s own host. Nothing is re-hosted here.

All 60 releases
0.51.0+1.8.9-forgebeta15 Sept 2025

OmniCore-0.51.0+1.8.9-forge.jar · 1.5 MB · for 1.8.9

Download latest
f13c43a92320…
Older versions24
  • 0.51.0+1.8.9-fabric15 Sept 20251.8.91.4 MB78 downloadsfe1e6b97bae8…Get
  • 0.51.0+1.21.8-neoforge15 Sept 20251.21.80.7 MB43 downloads03d0a4cc10b2…Get
  • 0.51.0+1.21.8-fabric15 Sept 20251.21.80.7 MB155 downloads599d1fa35069…Get
  • 0.51.0+1.21.7-neoforge15 Sept 20251.21.70.7 MB38 downloads9b3842ea5934…Get
  • 0.51.0+1.21.7-fabric15 Sept 20251.21.70.7 MB48 downloadsaa76347814ea…Get
  • 0.51.0+1.21.6-neoforge15 Sept 20251.21.60.7 MB26 downloadsefaa2afdffb9…Get
  • 0.51.0+1.21.6-fabric15 Sept 20251.21.60.7 MB39 downloadse872fff29a66…Get
  • 0.51.0+1.21.5-neoforge15 Sept 20251.21.50.7 MB30 downloads67864d55536e…Get
  • 0.51.0+1.21.5-fabric15 Sept 20251.21.50.7 MB38 downloads79c75cbb6724…Get
  • 0.51.0+1.21.4-neoforge15 Sept 20251.21.40.7 MB30 downloads130716ea4006…Get
  • 0.51.0+1.21.4-fabric15 Sept 20251.21.40.7 MB99 downloads77ce2d535ed8…Get
  • 0.51.0+1.21.3-neoforge15 Sept 20251.21.30.7 MB29 downloads25c98020831e…Get
  • 0.51.0+1.21.3-fabric15 Sept 20251.21.30.7 MB34 downloads2294f59c391e…Get
  • 0.51.0+1.21.2-neoforge15 Sept 20251.21.20.7 MB27 downloadsf9c904992a96…Get
  • 0.51.0+1.21.2-fabric15 Sept 20251.21.20.7 MB32 downloadsa04279b6cd26…Get
  • 0.51.0+1.21.1-neoforge15 Sept 20251.21.10.7 MB278 downloadsa2fb6946143a…Get
  • 0.51.0+1.21.1-fabric15 Sept 20251.21.10.7 MB143 downloads072761bf8f5c…Get
  • 0.51.0+1.20.6-neoforge15 Sept 20251.20.60.7 MB21 downloads6cd9560a4f0f…Get
  • 0.51.0+1.20.6-fabric15 Sept 20251.20.60.7 MB56 downloadsfcce084024e3…Get
  • 0.51.0+1.20.4-neoforge15 Sept 20251.20.40.7 MB13 downloadsccbba78a3dde…Get
  • 0.51.0+1.20.4-forge15 Sept 20251.20.40.8 MB19 downloads34889dcbce31…Get
  • 0.51.0+1.20.4-fabric15 Sept 20251.20.40.7 MB33 downloads321b3dddd10c…Get
  • 0.51.0+1.20.1-forge15 Sept 20251.20.10.7 MB515 downloadsc36ab5e78757…Get
  • 0.51.0+1.20.1-fabric15 Sept 20251.20.10.7 MB373 downloads21b7f7292b2e…Get

Frequently asked

Does OmniCore work on Minecraft 1.21.8?

Yes. 1.21.8 is the newest Minecraft version OmniCore 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 OmniCore support?

Everything the author has declared, from 1.8.9 up to 1.21.8. The full list is in the table above, with the Java runtime each version needs next to it.

Which platform or loader does OmniCore support?

NeoForge, Forge, Fabric. 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 OmniCore?

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 OmniCore under?

LGPL-3.0-or-later, 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 OmniCore?

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 OmniCore 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.

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Last checked 2 mo 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? .