Fabric Language Kotlin Mod is a dependency rather than something you notice in game: it lets Fabric mods written in Kotlin run, by bundling the Kotlin runtime and libraries and allowing a Kotlin object to act as a mod’s main class. It adds no blocks, items or world changes of its own. You install it because another mod listed it, and because it only leans on Fabric Loader it works the same whatever Minecraft version you are on.

Features:

  • Lets Fabric mods written in Kotlin load and run instead of failing at startup.
  • Bundles the Kotlin runtime and standard libraries, so each mod does not have to ship its own copy.
  • Allows a Kotlin object to be named as a mod’s main class, which is what Kotlin mods expect.
  • Adds no content: no blocks, no items, no recipes and no world generation changes.
  • Depends only on Fabric Loader, so the same build works across Minecraft versions.
  • Carries Kotlin coroutines and serialization as well, which the mods relying on it often use.
  • Fabric only, and one of the most widely installed library mods on the loader.

How to Use:

  1. Install Fabric Loader for the Minecraft version you play.
  2. Drop this jar into .minecraft/mods alongside the mod that asked for it.
  3. Start the game. There is nothing to set up and no config file to edit.
  4. If a Kotlin mod still fails to load, check its notes for the version of this library it needs and match it.

Wiki:

The Fabric Language Kotlin Mod wiki — full technical documentation for modders, developers, and players who want to dig deeper.

Open Wiki

How to Install:

New to Minecraft? Follow our step-by-step guide to install Mods on your PC.View Guide

Requirements:

Fabric Loader RequiredFabric API RequiredArchitectury API Mod RequiredCloth Config API Required

Fabric Language Kotlin Mod Download Links

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For Minecraft 26.2, 1.21.11, 1.21.5

Fabric 8 MB Jun 16, 2026
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For Minecraft 26.1.2, 26.1.1, 26.1

Fabric 7 MB Apr 2, 2026
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For Minecraft 1.21.11, 1.21.5, 1.21.4

Fabric 7 MB Apr 2, 2026
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For Minecraft 1.21.5, 1.21.4, 1.20.6

Fabric 7 MB Apr 2, 2026
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Fabric 7 MB Apr 2, 2026
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Fabric 7 MB Apr 2, 2026
Download from Server 1 — Download from Server 2

For Minecraft 1.21.4, 1.20.6, 1.20.5

Fabric 7 MB Apr 2, 2026
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For Minecraft 1.20.6, 1.20.5, 1.20.4

Fabric 6 MB Apr 9, 2026
Download from Server 1 — Download from Server 2
Fabric 7 MB Apr 2, 2026
Download from Server 1 — Download from Server 2
Fabric 7 MB Apr 2, 2026
Download from Server 1 — Download from Server 2

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