NOW AVAILABLE FOR 1.21.1

The UltimateMinecraft Client

Xeno Client & Optimizers

Engineered for peak performance. Designed to dominate. Xeno Client redefines what a Minecraft client can be.

58+
Modules
14+
Commands
520+
Commits
🔥
2026
Active
1.21.1 Auto Updates Anti-Cheat Safe High Performance Open Source DonutSMP Ready 3× FPS Boost Community Driven 1.21.1 Auto Updates Anti-Cheat Safe High Performance Open Source DonutSMP Ready 3× FPS Boost Community Driven

01 / Features

Everything you need.
Nothing you don't.

Five core pillars that make Xeno Client the go-to choice for serious players.

001
Lightweight Mod
Optimized mods with no lag spikes or performance issues. Pure speed, every frame.
Up to 3× FPS
002
100% Safe — Not Bannable
All mod code is tested and server-safe. Play without the fear of a ban.
AC Safe
003
Customizable UI
Shape the interface to your preferences with extensive customization options.
Fully Themeable
004
Easy Install
Simple installation and setup. Get into the game in minutes, not hours.
One-Click Install
005
Supported for 1.21.1
Built and optimized specifically for Minecraft 1.21.1 on Fabric Loader.
1.21.1 Only
006
Community Driven
Built from community feedback and regularly updated with new features.
3,000+ Players

02 / Preview

See it in action.

Screenshots taken live on DonutSMP with Xeno Client running.


03 / Download & Install

Get up and running.

Choose your version, download, and follow the steps. Don't skip OpSec.

Choose your Minecraft version
1.21.1
Latest stable — Fabric · Recommended
Download
Don't skip OpSec — you WILL get banned without it.
Make sure you install OpSec alongside Xeno Client. It bypasses anticheat detection and keeps you safe on Donut SMP. No OpSec = instant ban risk.
1
Install Meteor Client (dev build recommended)
Download the Xeno Client jar using the button above.
Required
2
Download Fabric API 1.21.1
Get Fabric API and drop it into .minecraft/mods.

↓ Download Fabric API
Required
3
Drop the .jar into your mods folder
Move the downloaded .jar into .minecraft/mods
4
Download OpSec — required to avoid bans
Drop OpSec into .minecraft/mods — essential for anticheat safety on DonutSMP.

↓ Download OpSec
Critical
5
Launch with Fabric Loader
Open your Minecraft launcher, select the Fabric profile for 1.21.1, and hit Play.
Final step

04 / FAQ

Frequently Asked Questions

Everything you need to know before downloading.

Yes, Xeno Client is completely safe to use on DonutSMP and other servers. All code is thoroughly tested and verified to be server-safe.
Xeno Client is built specifically for Minecraft 1.21.1 on Fabric Loader.
Yes — while Xeno Client was specifically built for DonutSMP, it works perfectly on other servers too.
Follow the Installation guide above. Download the .jar, add Fabric API and OpSec to your mods folder, then launch with Fabric Loader.
Absolutely not. Xeno Client is fully open-source with no token loggers, backdoors, or obfuscation. Feel free to inspect the code or compile it yourself.
Updates are released whenever necessary or required by server updates. All updates are announced on our GitHub and social channels.

05 / Credits

Made by Passionate People

Xeno Development

L3KKX
// Lead Developer

Testers

Dxzzgrave
Coderhelix
81ol

Made Possible With

FabricModrinth

Special thanks to the entire Minecraft modding community for their continued support and inspiration. Xeno Client is built with passion for the players.


06 / Source

Official GitHub Repo

View the source code, report issues, and follow the project.

GitHub
XenoClient
github.com/XenoClient — source code, releases & issues