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OsmiumMinecraft mod for 1.21

Osmium adds quality of life features to mincraft, much like popular PvP clients. For fabric 1.17 and above.

client onlynewest supported 1.21Utility
Latest version
1.4.2-1.21
Minecraft
1.17 to 1.21
Java
Java 21+
Loader
Fabric
Licence
CC0-1.0
Downloads
26.3k
Updated
2 y ago
Available on
Modrinth
Space NodePartner

Host Osmium servers

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

  • 1.21
  • Fabric
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21Fabric21+declared13 Jun 2024
1.20.6Fabric21+declared29 Apr 2024
1.20.4Fabric17+declared7 Dec 2023
1.20.2Fabric17+declared20 Sept 2023
1.20.1Fabric17+declared12 Jun 2023
1.20Fabric17+declared2 Jun 2023
1.19.4Fabric17+declared14 Mar 2023
1.19.3Fabric17+declared7 Dec 2022
1.19Fabric17+declared7 Jun 2022
1.18.2Fabric17+declared28 Feb 2022
1.18.1Fabric17+declared10 Dec 2021
1.18Fabric17+declared30 Nov 2021
1.17.1Fabric16+declared6 Jul 2021
1.17Fabric16+declared8 Jun 2021

Download

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

1.4.2-1.21release17 Jun 2024

osmium-1.4.2-1.21.jar · 0.2 MB · for 1.21

Download latest
58b50edc4f08…
Older versions18
  • 1.4.2-1.20.625 May 20241.20.60.2 MB377 downloads7f1f44a37ba2…Get
  • 1.4.1.2-1.20.426 Dec 20231.20.40.2 MB2.4k downloads64878f8d1eb0…Get
  • 1.4.1.2-1.20.224 Sept 20231.20.20.2 MB10.5k downloadsa1a12c58cc97…Get
  • 1.4.1.1-1.20.18 Jul 20231.20, 1.20.10.3 MB3.0k downloads7130d5579167…Get
  • 1.4.1-1.20.120 Jun 20231.20, 1.20.10.3 MB313 downloads6291078d061c…Get
  • 1.4.1-1.2011 Jun 20231.200.3 MB166 downloadsbafb7c5590f6…Get
  • 1.4.1-1.19.415 Mar 20231.19.40.3 MB572 downloads5a4e2954d36c…Get
  • 1.4.0.1-1.19.312 Jan 20231.19.30.3 MB264 downloadscceb21a7a3f5…Get
  • v1.4.031 Dec 20221.19.30.3 MB260 downloadse8b253b2304b…Get
  • 1.3.0-1.1911 Jun 20221.190.4 MB500 downloads6c203d174785…Get
  • 1.3.19 Apr 20221.18, 1.18.1, 1.18.20.3 MB798 downloads3a132eafd565…Get
  • v1.330 Nov 20211.17, 1.18493 downloads
  • v1.2.3.114 Oct 20211.17, 1.17.10.3 MB447 downloads557cea52448a…Get
  • v1.2.325 Sept 20211.17, 1.17.1153 downloads
  • v1.2.227 Aug 20211.17, 1.17.1188 downloads
  • v1.2.124 Aug 20211.17, 1.17.1140 downloads
  • V1.2.022 Aug 20211.17, 1.17.10.2 MB130 downloadsce38380433f0…Get
  • V1.1.05 Aug 20211.17, 1.17.1210 downloads

Frequently asked

Does Osmium work on Minecraft 1.21?

Yes. 1.21 is the newest Minecraft version Osmium 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 Osmium support?

Everything the author has declared, from 1.17 up to 1.21. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Osmium on the client or the server?

The client only. There is nothing to install on the server, so it works on any server you can already join.

Which loader does Osmium need?

Fabric. A build for one loader will not load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Osmium?

Java 21 or newer, because that is what the newest Minecraft release it supports requires. The requirement comes from the game rather than from the mod itself.

What licence is Osmium under?

CC0-1.0, 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 Osmium?

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 Osmium safely?

From the author's own page on Modrinth, which is where the data here is synced from. MCReference never mirrors, re-hosts or repackages a file: every download button points at the original source, so you get exactly what the author published.

Works on the same versions

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

Entity CullingUsing async path-tracing to hide Block-/Entities that are not visibleFerriteCoreMemory usage optimizationsImmediatelyFastSpeed up immediate mode rendering in MinecraftYetAnotherConfigLib (YACL)A builder-based configuration library for Minecraft!Xaero's MinimapDisplays a map of the nearby world terrain, players, mobs, entities in the corner of your screen. Lets you create waypoints which help you find the locations you've marked.[ETF] Entity Texture FeaturesEmissive, Random & Custom texture support for entities in resourcepacks just like Optifine but for Fabric

Last checked 6 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? .