Minecraft Java 1.21 Mods
Browse 729 free mods for Minecraft Java 1.21 — popular picks include OneStackMax, KillerWorld, Dynamic Lights By ManojTheReaper.
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OneStackMax
A datapack that makes all items unstackable
KillerWorld
“KillerWorld: Extreme performance turned the terrain into a predator.”
Dynamic Lights By ManojTheReaper
Bring Dynamic Lights to Vanilla Minecraft! Hold a torch, lantern, glowstone, or other light-emitting items to light up the world around you—no mods required.
BsCleaner
Advanced entity cleaner with timer, sounds, titles & gradient messages for Paper servers
InsecureNightVision
InsecureNightVision gives players a simple and lightweight way to manage night vision effects on a server. The plugin is easy to use, performance-friendly, and designed for smooth integration into any Minecraft server setup.
SlightlySaferKillerWorld
SlightlySaferKillerWorld: Extreme performance turned the terrain into a predator.
EclipseFX
EclipseFX is a cinematic aura and particle effects engine for RPG, MMORPG, anime, fantasy, and progression servers, featuring layered auras, live previews, awakening effects, class-based cosmetics, and performance-safe visuals.

Epic Adventure Craft: Fantasy SMP
The official modpack to play on the Epic Adventure Craft Network's Fantasy SMP.
Infinite_Parkour
Tired of static, repetitive parkour maps that never change? Infinite Parkour is the ultimate lightweight, high-performance plugin that generates an endless, procedurally calculated jumping path for your players.

Falcon Core
A comprehensive core plugin designed for Donut SMP, providing essential server management tools, custom mechanics, and backend optimizations. To those images that shared, its not only that but a lot more.
RedLegendaries
RedLegendaries is a feature-rich, high-performance Paper/Spigot Minecraft plugin (built for Minecraft 1.21+ / Java 21) that introduces 9 unique custom Legendary Weapons equipped with active primary/secondary abilities, passive buffs and more...
Silk Client Mod (1.21.4) – 70+ Ghost Modules for Crystal PvP
Silk Client Mod is a PvP utility client for Minecraft. It focuses on Crystal PvP, fast combat actions, and automation features while keeping a clean and organized interface. Features: Combat Crystal and Anchor Combat Auto Crystal – Automatic crystal combat Crystal Optimizer – Improves crystal damage Key Crystal – Crystal keybind Key Anchor – Anchor […]
Xiu Client Mod (1.21.11) – Crystal PvP Ghost Client
Xiu Client Mod is a lightweight PvP Utility / Ghost Client designed for advanced combat gameplay. The client mainly focuses on Crystal PvP, Anchor PvP, and automated combat features. Features: Crystal Combat Auto Crystal – Automatically places and breaks crystals Auto Hit Crystal – Quickly attacks nearby crystals Crystal Optimizer – Improves crystal damage efficiency […]
T.O Magic And Extras Irons Spells Addon Mod (1.21.1, 1.20.1) – Enhance Your Magic
T.O Magic And Extras Irons Spells Addon Mod is an addon for Irons Spells 'n Spellbooks, introducing new balance changes, optimizations, and enhancements to improve the magic-based gameplay experience. Features: Tweaks and balances existing spells for better gameplay. Adjustments to mana usage, cooldowns, and spell effects. Improved integration with other magic mods. Screenshots: T.O Magic […]
Classic Combat Mod (1.21.1, 1.20.6) – Bring Back 1.8 Style PvP
Classic Combat Mod brings back the old fighting style from before the Combat Update. This mod gets rid of the attack cooldown for all weapons, so you can always hit for full damage. It works on servers without needing players to install it and won't affect your game's performance. You can also add or remove […]
SimpleCraft Resource Pack (1.21.1, 1.20.1) – Texture Pack
SimpleCraft Resource Pack simplifies the overall look of the game with a clean, customized color palette. The pack includes features like custom models, texture animations, tool damage textures, and more. Screenshots: Requires: Optifine SimpleCraft Resource Pack Download Links For Minecraft 1.21.x 16x: Download from Server 1 – Download from Server 2 For Minecraft 1.20.6, 1.20.4, […]
Colorblind Terracotta Resource Pack (1.21.1, 1.20.1) – Texture Pack
Colorblind Terracotta Resource Pack allows you to replace the Terracota colors by pictures (mobs heads), for colorblind peoples playing minigames involving colored Terracotta. With this pack installed, you can easily create cute blocks with different colors and images. In general, it is a great add-on to enhance your visual impression without much performance. Screenshots: Colorblind […]
a lot of mods
very optimized modpack with the right amount of mods
Project: Goliath
Many bosses and adventures with magic, iron's spells, create, create: aeronautics and L_Enders_Cataclysm. This modpack was made for a server I'm starting by the same name.
Aoura MC
Adds vanilla improvements bosses' new biomes terrain etc.
Potatomized
The King Of Optimization! It has all of my Mods to Increase your FPS from the Launcher's default by 3x!!
A Mighty Adventure
A simple RPG fantasy modpack...
Simply Better : a simple experience(kinda)
this modpack simply makes minecraft better by adding new structures, new mechanics, new equipment and new mobs without making it too complex.(simply better, duh)
(Un)Official LHS Server Modpack
This is the modpack from my school server so that anyone can play the mods installed
sound rader
A Fortnite-style sound radar HUD that shows nearby players, mobs, attacks and projectiles as icons on your screen. Fully configurable via Mod Menu — adjust detection range, icon size, colors and toggle each event type on or off.
BlockRestrictor
A plugin that kills players when they step on an unapproved block. 指定した足場以外を踏んだら死ぬプラグイン
GUI Command Blocker
GUICommandBlocker Stop players from using commands while they have GUI open! (Specially to prevent mod like ui utilis to sent commands in gui)
Cobblemon SMP - The #1 Legendary Pokemon Adventure
✅💯 The Ultimate Pokémon Academy! 💯✅ Catch, train, and level your Pokémon with friends in Cobblemon. Enjoy mods included in cobbleverse, Level up, and grow all your mons —starting your cobblemon verse journey! The Best Optimized RPG MMO Experience atm!.🌟
End Crystal Optimizer
Fixes waiting on the server after crystal break before end crystal entities are cleaned.
All About Mobs - Show Mob Health - Show Mob Names - Set Mob Health - Set Mob Damage
Set up your mob settings—whether on the server or client side—to add extra features to your game.
Ultimate Create 7 - UC7
⚡ UC7 – Automate, craft spells, and conquer quests in a magical, performance-friendly adventure! 🔮
Quick Auto Totem
This mod allows you to equip a totem every time you use another one.
Jujutsu Kaisen by teiraki
A Jujutsu Kaisen inspired modpack focused on singleplayer and LAN gameplay with balanced performance.
Throw Weapons
Allows you to throw any item, with a clean first person animation, 3d models, and Physics
FisuraCraft SMP
FisuraCraft is an Argentinian modded SMP focused on community gameplay, balanced progression, exploration, automation, and quality-of-life improvements. Optimized for smooth multiplayer survival and long-term worlds.
Evergrow
A brutal high-end adventure modpack packed with tons of new mobs, bosses, weapons and dimensions – heavily optimized and balanced for powerful PCs.