Kotlin for Forge Unofficial Extended Support
I don't know my version or loader
This is unofficial version for Miecraft 1.16.5 . This provides latest Kotlin libraries to 1.16.5. If you want use original version, visit here
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.
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.16, 1.16.1, 1.16.2
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — see the MC Java Mods guides for the full walkthrough.
- Ships as kotlin-for-forge-unofficial-1.18.0-2.1.10.jar — drop this file into the mods folder
- Download size: 5.1 MB
- Download link checked 1 Sept 2026 — working
These come from our own check of the pack file, not from the source page.