Radium Client

PvP HUD with reach readouts, hitbox outlines and keystrokes.

• Loader: Fabric
• Minecraft 1.21.11
• Latest: v3.1.2

Overview

Radium is a lean PvP client focused on information: how far you're hitting from, what the hitboxes look like and what keys you're pressing, all in a HUD you can rearrange.

Features

• Reach indicator: Shows the distance of every hit
• Hitbox outlines: Custom hitbox colors and thickness
• Keystrokes: WASD and mouse display for clips
• Combat overlay: Combo counter, target health and armor

How to install Radium Client

1. Download Radium Client v3.1.2.
2. Get Fabric API 1.21.11 from modrinth.com. It needs to be in your mods folder too.
3. Open your mods folder: %appdata%\.minecraft\mods on Windows, ~/Library/Application Support/minecraft/mods on macOS, ~/.minecraft/mods on Linux.
4. Drop the jar in, pick your Fabric 1.21.11 profile in the launcher and join DonutSMP.net.

FAQ

Is it free?

Yes. No keys, no accounts, no paywalls.

What key opens the GUI?

Right Shift by default. You can rebind it in the settings.

It crashes on launch.

Make sure Fabric API 1.21.11 is in your mods folder too. Still crashing? Ask in Discord.

Changelog

v3.1.2 (2026-09-27)

• Reach indicator accuracy fixes
• Combo counter
• Lower FPS cost

v3.0.0 (2026-08-03)

• New HUD editor
• Hitbox outline colors
• Reach indicator

v2.9.0 (2026-06-14)

• Combat overlay
• Keystrokes

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