Minecraft Java 1.21 Mods
Browse 3,671 free mods for Minecraft Java 1.21 — popular picks include Maximum Difficulty, Happy Ghast Datapack Backport, Hollow Knight: Silkcraft.
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Maximum Difficulty
A mod that increases the difficulty of Minecraft to its maximum, reaching 32-bit integer limits.
Happy Ghast Datapack Backport
A basic backport of the Happy Ghast to older versions of Minecraft through the use of datapacks. Multiplayer friendly
Hollow Knight: Silkcraft
Welcome to Silkcraft, this mod aims to bring the kingdom of Pharloom from Silksong into minecraft!
Chaos Engine
Chaos Engine adds events to the server (UFO, meteorite, glitch events, and others), custom enchantments, and careers. The plugin also includes a weapon system, cases, a casino, and much more!
Torch Protect
Keep hostile mobs from spawning within a radius.
Bat Leads
This mod allows you to use the lead on bats!
Hunters Vs Fugitive
A competitive minigame mod where hunters must track down a fugitive using unique abilities and stress mechanics.
MobSpawnBlockerPL
MobSpawnBlocker is a lightweight plugin for Paper, Spigot, Bukkit, Purpur & Folia that allows you to block specific mobs from spawning using an easy-to-edit config.yml.
MONEY-MONEY
Adds a simple money system to Minecraft. Earn money from mobs and use 100 / 1,000 / 10,000 bills with a control book.
Fazbear Rising
Brings the world of FNAF to minecraft in it's style!
MythicKorra - Advanced ProjectKorra & MythicMobs Integration Addon
Expand your MythicMobs bosses with element-based mechanics, statuses, conditions and more!
Empire
The plan is to have various creatures form their own empires. A lot of special equipment from different empires has been added.

RPG Loot Reforged
A fork of LostPuppet's remake of Michael9r9r's rpg loot system. Every weapon has unique stats and abilities.
Natural Armor│天然鎧甲
Turtles and armadillos now have higher defense.│海龜和犰狳現在擁有更高的防禦力。
Trial Chambers
A PVP & PVE Datapack based on the new Trial Chambers
Illager Update
Improving the current mechanics of vanilla pillagers, traders and more illager related content.
VANILLA-ELARGE [Utilitarian perspectives]
A Minecraft Vanilla DLC experience
DTC - Destroy The Core
A competitive PvP event where players must destroy the core to earn rewards.
monsters-dont-burnin-the-sun
Monsters no longer burn
Always Cooked Food
A datapack that makes animals always drop cooked food when killed instead of raw food. (Quality of life)
Fast Creeper
Adds customizable, extremely fast creepers with configurable explosion modes (normal, charged, or End Crystal-level) via gamerules.
Portable allays
A mod improving the portability of allays
BackAlert
Warns you when hostile mobs approach from behind.
Wolf Drops│狼掉落物
Wolf will drop Bone when killed.│狼被擊殺時會掉落骨頭。
Wither Rose Tweak│凋零玫瑰調整
Wither Rose's damage rate is changed to 1 second.│凋零玫瑰的傷害速率變為1秒。
euclidia
Adds Neural Network Powered Epic Fight Mob Combat
Origins: Revenant
Origin datapack that adds the Revenant, an origin based on the Stray.
UltraEvolution
🧠 Transform Minecraft mobs into intelligent, adaptive civilizations that learn, evolve, raid, build secret bases & upgrade gear. No more dumb mobs — ever.
TurnMobsToEggs
This is a very basic mod that I created that allows you to simply throw an egg at any mob that has a spawn egg and they will disappear and drop their spawn egg! Purpose for this: I had a plugin way back when that allowed me to do this. I used it a lot!!
BattleFoxes (polymer)
Tame and upgrade Fox companions, fully vanilla client compatible!
VillagerRepopulation
Makes villagers spawn naturally over time in villages. You can get them back now!
Better Spawn Eggs craft
This data pack adds the ability to craft spawn eggs and spawners
Reach Enchantment
A vanilla datapack that adds a Reach enchantment, letting you hit mobs from further away.
Harder
Makes Minecraft a harder game.
EditVillagers Plugin
The easiest way to create a Trader in Minecraft!
Villager Panic
Villagers now react more realistically to violent players