Minecraft Java 1.21 Mods
Browse 85 free mods for Minecraft Java 1.21 — popular picks include CrashPanel | CrashCore, VillagerExplorer, Lag Detective.
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CrashPanel | CrashCore
The ultimate No-Code engine. Elevate your server with hot-reload, node-based event scripting, plus full model and particle editors in one intuitive interface.
VillagerExplorer
Villager Explorer is a client-side Minecraft mod that lets you view detailed information about villagers in a beautiful, interactive GUI.
Lag Detective
Lag Detective is a lightweight diagnostics mod that helps answer where the lag is coming from.
ItemDisplayPlugin
This plugin allows the collection of items dropped within a 5-block radius in Minecraft, merging the items with the same type and displaying their quantity in the item’s custom name. Items that cannot be stacked, such as enchanted equipment (e.g., swords,
IFC-Integrations
Unite the worlds of Ice and Fire and MCA Reborn with legendary relics, enhanced creature interactions, and a new way to experience both mods together.
PacketEventsSK
A skript addon adding packet related features to Skript.
Minecraft Compendium
Uses advancements to log information for the player. Look at mobs with your spyglass to add them to your Mobestiary, and discover biomes and structures!
The Mob
Mob Framework | YAML | Boss Phases | Radar HUD | AutoSpawn | Player Stats | 1.21.+
ChristCraft
Removes magic and spiritism where possible.
RankedSMP-Better
Youtubers (SharpnessMc , Wemmbu , Flamefrags , etc) Inspired PaperMC plugin for Minecraft 1.21.x that adds a competitive ranking system with unique abilities, extra inventory, and more.
Easy Bee
A completly new way to trasport bees with extra tweaks
Advanced API
AdvancedAPI provides very simple code, for example, ItemBuilder or SimpleInventory, which can be used to create things faster. ONLY FOR PLUGIN DEVELOPERS
OptiFoundry
Optimize chunks, entities, and ticks
Easy Freezing
A mod that allows you to Freeze Time around you at will! Try with multiplayer and things get confusing fast!
Sound Manager
This is the mod for usually used for muting or changing the voice of the mobs,blocks or generall things like death, fall damage , hit etc. You can edit them customly see images for more info
Espoir SMP
The plugin's twist is ⚙️ How the system works: 🧿 You start with 3 souls. 🔻 Each time you die, you lose a soul. 💀 At 0 souls, you become a ghost: spectator mode for 24 hours. ⚔️ Kill a player → you steal one of their souls, if you don't already have all
Lightning Lotad [Remastered]
This is a recreation of the 1.6.4 mod, "Lightning Lotad", brought to Minecraft 1.20.1 This mod adds new tools & weapons as well as new materials and blocks!
Better Copper Golems
Unleash the true power of copper golems!
Poofy's Uncraftable Recipes+
This mod adds over 280+ crafting recipes to vanilla Minecraft!
PyCraft IDE
An in-game Python IDE for Minecraft that allows scripting and interaction with the game through a Python API.
TQs Unstack Shulkers in item form
Unstacks stacked shulker boxes that are in item form. Handy with mods that can stack shulker boxes in your inventory and on the ground, like tweakeroo and carpet mod.
CorruptionCraft
A plugin that challenges players. Random events can occur. (no Spoilers!)

Slime Tweaker
Small mod that adds a gamerule and config to change the size of spawned slimes.

Chickens Lay Anything
Configure what items chickens lay using loot tables!
Wardens drop OP loot
This datapack makes wardens drop over-powered loot
EditVillagers Plugin
The easiest way to create a Trader in Minecraft!
Art's CLA (NLAM)
A datapack that allows chickens to lay anything with some restrictions to reduce abuse and server lag. Based on helmo2019's Chickens Lay Anything.
euclidia
Adds Neural Network Powered Epic Fight Mob Combat

OGDuels
OGDuels is a lightweight, high-performance Duels, FFA, killstreak, bounty, and leaderboard module designed for competitive Minecraft PvP servers.
PNode
Paper plugin with intuitive visual node-based editor for server logic. No coding required.
Villager Sound Changer
This mod allows you to press F7 to open a menu where you can customize villager sounds to your preference. HOTKEYS: F7 opens the menu.
Custom Boss Zoryth AI
Zoryth AI Boss is a premium, high-performance custom boss framework for Paper (1.21.x).
mannequin controlls
mannequin controlls allows you to move/pose mannequin easily and can be used as a mini library for a variety fo projects.
GLB lib
A library mod that allows for glb 3d models to be used for minecraft entities
Void Pressure
A flexible NeoForge framework for modpacks, providing a global pressure system to trigger fully configurable events.
Giant Attribute Tweak
Changes the Giant Mob attribute to make it compatible with mods that adds IA