CurseForge · Minecraft mod
Kotlin for Forge
Adds a Kotlin language loader and provides some optional utilities.
Quick answer
Which Kotlin for Forge release matches 26.1.2?
Kotlin for Forge 6.3.0 targets 1.21.9, 1.21.10, 1.21.11 with NeoForge. The project page does not say whether it belongs on the client. The project page does not say whether it belongs on the dedicated server. No extra mods listed for this file.
Where it goes
Is Kotlin for Forge required on the client, server, or both?
The project page does not say whether it belongs on the client. The project page does not say whether it belongs on the dedicated server.
The source does not explicitly classify this release as client-only or server-only.
What else does Kotlin for Forge 6.3.0 need?
Kotlin for Forge 6.3.0 on 26.1.2. Every mod below is checked against that same setup.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Kotlin for Forge without breaking your instance.
Built for Kotlin for Forge 6.3.0 on 26.1.2. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use Kotlin for Forge 6.3.0. It targets 1.21.9, 1.21.10, 1.21.11 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
The project page does not say whether it belongs on the client. The project page does not say whether it belongs on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside Kotlin for Forge 6.3.0. It opens that exact file at the source.
About this project
What does Kotlin for Forge add?
Used to make mods with the Kotlin programming language. Works by shading the Kotlin libraries, providing KotlinLanguageProvider to load @Mod object declarations, providing AutoKotlinEventBusSubscriber to load @EventBusSubscriber declarations, and providing useful utility functions and constants.
As of Kotlin for Forge 1.8.0, this provides Kotlin 1.4.21, Kotlin coroutines 1.4.2, Kotlin JSON serialization 1.0.1, and Jetbrains annotations 20.1.0.
If you're not a mod developer, this is a dependency mod.
Unlike Kottle, this library (as of 1.2.0) provides its own implementation of IEventBus that supports IEventBus#addListener and IEventBus#addGenericListener with function references.
Information for how to implement can be found here.
You do not have to use the language loader or any of the features Kotlin for Forge provides, you can just use it for the bundled Kotlin libraries.
If you'd like to ask for help or suggest something, feel free to do so on the Kotlin for Forge discord server.
Project description from CurseForge.
Pick your setup
Kotlin for Forge by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.1.2
1 loader build26.1.1
1 loader build26.1-snapshot
1 loader build26.1
1 loader build1.21.11-snapshot
1 loader build1.21.11
2 loader builds1.21.10
2 loader builds1.21.9
2 loader builds1.21.8
2 loader builds1.21.7
2 loader builds1.21.6
2 loader buildsShowing the newest 12 of 56 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Kotlin for Forge versions and loaders
Kotlin for Forge 6.3.0
kotlinforforge-6.3.0-all.jar
28 Jun 2026
6.3.0
kotlinforforge-6.3.0-all.jar
28 Jun 2026
Kotlin for Forge 6.2.0
kotlinforforge-6.2.0-all.jar
10 Mar 2026
6.2.0
kotlinforforge-6.2.0-all.jar
10 Mar 2026
Looking for an older file? The official CurseForge project page is in Resources.