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Koala LibMinecraft mod for 1.21.1

Multipurpose Library used between many of my mods! Adds Configs, Mod Update Checkers, Post Processing Shader Registration for Render Layers, Toggle-able Magic Meter, etc

client and servernewest supported 1.21.1UtilityGame MechanicsLibraryMagic
Latest version
1.2.14
Minecraft
1.20.1 to 1.21.1
Java
Java 21+
Loader
Fabric
Licence
LicenseRef-Custom
Downloads
17.1k
Updated
6 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Koala Lib servers

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

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

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Fabric21+declared8 Aug 2024
1.21Fabric21+declared13 Jun 2024
1.20.1Fabric17+declared12 Jun 2023

Download

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

All 34 releases
1.2.14release10 Apr 2026

koalalib-1.2.14.jar · 0.4 MB · for 1.20.1

Download latest
f6db82936a90…
Older versions24
  • 1.2.136 Mar 20261.20.10.4 MB1.2k downloads30f02e2edcc1…Get
  • 1.2.121 Jan 20261.20.10.4 MB1.8k downloads2391e3477bbb…Get
  • 1.2.1118 Dec 20251.20.10.4 MB247 downloadsbc15280d6ec0…Get
  • 1.2.1030 Nov 20251.20.10.3 MB128 downloadse355b22802ab…Get
  • 1.2.9.818 Nov 20251.20.10.3 MB173 downloads9e45ee6963be…Get
  • 1.2.9.718 Nov 20251.20.10.3 MB24 downloads8179a1443a4a…Get
  • 1.2.9.613 Nov 20251.20.10.3 MB54 downloadsb9f6430d1b69…Get
  • 1.2.9.57 Nov 20251.20.10.3 MB56 downloadsae23291c9fb2…Get
  • 1.2.9.44 Nov 20251.20.10.3 MB39 downloads7668bf997c08…Get
  • 1.2.9.329 Oct 20251.20.10.3 MB66 downloads3caf117f8c23…Get
  • 1.2.9.228 Oct 20251.20.10.3 MB37 downloads1918f2385b5a…Get
  • 1.2.9.127 Oct 20251.20.10.3 MB26 downloads549865c2755c…Get
  • 1.2.926 Oct 20251.20.10.3 MB52 downloadsa42a3939d911…Get
  • 1.2.8.123 Oct 20251.20.10.3 MB42 downloads6faad3a380a2…Get
  • 1.2.823 Oct 20251.20.10.3 MB32 downloads20b76bc12193…Get
  • 1.2.7.220 Sept 20251.20.10.2 MB424 downloads542ec533568a…Get
  • 1.2.7.119 Sept 20251.20.10.2 MB44 downloads3f5b930191ac…Get
  • 1.2.718 Sept 20251.20.10.2 MB35 downloads5b7034f24bb3…Get
  • 1.2.6.112 Sept 20251.20.10.2 MB120 downloads5fc843dfc079…Get
  • 1.2.611 Sept 20251.20.10.2 MB33 downloadsd73a344e31ac…Get
  • 1.2.58 Sept 20251.20.10.2 MB43 downloads7866ee6f78b0…Get
  • 1.2.44 Sept 20251.20.10.2 MB42 downloads32eb9f4d8643…Get
  • 1.2.33 Sept 20251.20.10.2 MB38 downloads359a3efdc6f6…Get
  • 1.2.220 Jul 20251.20.10.2 MB112 downloadsfa039ce36530…Get

Frequently asked

Does Koala Lib work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Koala Lib 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 Koala Lib support?

Everything the author has declared, from 1.20.1 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 Koala Lib 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 Koala Lib support?

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 Koala Lib?

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 Koala Lib under?

LicenseRef-Custom, 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 Koala Lib?

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 Koala Lib 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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Details from Modrinth, where the author last updated it on 10 Apr 2026. 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? .