100% Free Open Source Fabric 1.21.1

The Client That
Belongs to Everyone

RubyClient is a free, open-source Minecraft client for Fabric 1.21.1 -- built in public, modified freely, and owned by the community.

Download Free 1.21.1 View Source
What it does

Packed with features,
zero price tag

Everything you need in a Minecraft client, with nothing hidden behind a paywall. Ever.

⚡
Modules

43 Total Modules
Combat, CPvP, Utils, Render, BaseFinding, And many more...

🎨
HUD Customization

Drag-and-drop HUD editor
Move, resize, Toggle

🔭
Visual Modules

Fullbright, Tracers, Nether xray, BlockESP

🛡️
Combat/CPvP Modules

Auto Totem, Auto Crystal, Kill Aura, Reach, Extended Hitboxes, CPS counter, Totem Count

🧭
Base Hunting

Goliath Map, Under Deepslate View, Auto Mine, RTP base finder

🔧
OpenSource And API

Full viewable SourceCode, Full Compatibility, minimal dependecies.

MIT Licensed
RubyClient.java
// RubyClient -- Free & Open Source // github.com/RubyDevs/rubyclient @Environment(EnvType.CLIENT) public class RubyClientMod implements ModInitializer { public static final String MOD_ID = "rubyclient"; public static final Logger LOGGER = LoggerFactory.getLogger(MOD_ID); @Override public void onInitialize() { LOGGER.info("RubyClient loaded. Free forever."); ModuleManager.init(); HudRenderer.register(); } }
Open Source

Built in public.
Forked freely.

RubyClient's entire code lives on GitHub and GitLab under the MIT license. You can: Read it, fork it, improve it, ship it.

  • Full source code publicly available on GitHub & GitLab
  • MIT licensed -- use it however you want
  • Community contributions welcomed and merged
  • No telemetry, no tracking, no hidden code
  • Reproducible builds -- compile it yourself and verify
View on GitHub

Zero cost. Forever.

RubyClient will always be free to download and use. No premium tiers, no subscriptions, no feature locks.

Get it Now -- It's Free
Requirements & Install

Two mods. That's it.

RubyClient runs on FabricMC. Make sure you have the following before installing.

Required 📦
Fabric API

The official API library for Fabric mods. Drop this in your mods folder alongside RubyClient.

for 1.21.1
💎
RubyClient

The client mod itself. Drop the .jar into your mods folder and launch Minecraft 1.21.1.

Latest

Installation Guide

  1. Install Minecraft 1.21.1 and launch it at least once to generate game files.
  2. Download and run the Fabric Installer from fabricmc.net, selecting version 1.21.1.
  3. Download Fabric API for 1.21.1 from Modrinth or CurseForge and place the .jar in your .minecraft/mods folder.
  4. Download the RubyClient .jar and drop it into the same mods folder.
  5. Launch Minecraft with the Fabric 1.21.1 profile. RubyClient will be ready to go.
Download RubyClient 1.21.1