How do I install Radium?

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. Opens on Modrinth — not every file is mirrored on our own servers.

What Minecraft version does Radium work with?

The listing gives Minecraft 1.21.1. This is the version stated by the author or source site, not something we verified ourselves.

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Radium

Java mod listed for Minecraft 1.21. File opened and checked on 2 Oct 2026; downloads from the MC Java Mods app on Android.

by Asek3 · on Modrinth

⬇ Download on Modrinth

Open in MC Java Mods Get it on Google Play →

What is Radium?

An unofficial fork of Lithium by CaffeineMC, on Forge

Canary

Canary basically just disables some important Lithium optimizations, besides Canary is a hardfork and upgrading to upstream is slow, we act differently.

Modpack Permissions

This is a free and open-source project; you can include it in your mod pack as long as you provide attribution!

Common Questions

For any other questions, please contact our discord!

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft version listed: 1.21.1
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 — How to install Minecraft Java mods & modpacks walks through it step by step.

File checked by MCModsHub

Ships as radium-mc1.21.1-0.13.1+git.4994e83.jar — drop this file into the mods folder
Download size: 732 KB
Download link checked 7 Oct 2026 — working

These come from our own check of the pack file, not from the source page.

Explore more

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