Minecraft Java 1.21 Mods
Browse 12,335 free mods for Minecraft Java 1.21 — popular picks include EnColaMobs, Mob Extinctions, Killer Bees.
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EnColaMobs
EnColaMobs - Optimize your server to the max! ⚡ Say goodbye to lag caused by uncontrolled mobs.
Mob Extinctions
Add the challenge of mob conservation to your server!
Killer Bees
Aggressive swarming bees with a real venom, panic and syringe system - not just a reskinned bee.
Olympus Rush
Climb a hand-sculpted Olympus and slay its thirteen gods — God of War-style boss battles with the Blades of Chaos, and Hades waiting on his throne beneath the world.
AlwaysBestHorse (ABH)
Always Best Horses is a lightweight, server-side Fabric mod. Whenever a player successfully tames a horse, its statistics are automatically maximized to the highest possible vanilla limits.
O's FlyingCarpet
This only adds a flying carpet,as u can see just like it's name.
MooseMobs
Overhaul the Mobs in your Minecraft world with Moosified Whimsey!

Bosses Reimagined
This is release of Bosses Reimagined. It is release but ,if you have any bugs you can message me.
Warden deeps
This project add lot of things. Starting, from the new, brand dimension, the warden deeps. A new block, called sculk jerk, and 2 brand new mobs, one u'll need to summon it by 2 blocks up of sculk, and a pumpking, and the other one is the Deep Guard
creatifight
A new gamemode for players who want the thrill of building and fighting without worrying about damage and dying. Like creative mode, but with aggressive mobs to battle.
PWrideperspective
A mod that improves the mob riding mechanics by tweaking them slightly.
Rotten Flesh to Beef
just cook a piece of rotten flesh in a furnace (idk if it works in a smoker or campfire but idgas) and it'll give raw beef! i made this for fun and jst decided to upload it
HissTickBoom [BNB Standalone #2]
Makes Creepers even more painful to deal with!
Artificial Unintelligence
Adds Merl, the Minecraft Support Virtual Agent into minecraft!
Fih.
Adds a silly little fish!
Colored Shulkers
Adds variety to Shulkers by making them in different colors. Naming a Shulker Jeb, will make it act like a Jeb Sheep!
Wednesday Frogs
Mimics Wednesday Frogs from the craft mine update.
Allow wolves to attack teammates
A mod that allows dogs to attack other players and mobs, even if they are part of the same team. Experimental - may break other mob's team behavior.
SoulCommand
SoulCommand is a Minecraft 1.21.4 Bukkit plugin that lets hostile mobs temporarily possess players, causing them to lose control and exhibit eerie behaviors before breaking free.
MoreBurning
Make more hostile mobs burn in the sun.
Kaboom Moon 2
Adds a Creeper Moon to Enhanced Celestials 2
Mob Animations
This mod adds various signiture actions for mobs using the /mobanim command.
Koishi's Wonderfully Steeltastic Fakedex!!
A cobblemon add-on that adds many fakemon, mostly steel types!
Speedrun Scientology
Explore a new dimesion containing an infinite dungeon where you can explore, loot, and fight monsters as you try to escape.
Tricky Trolls
This Mod Adds 2 Trolls To minecraft and custom armor and blocks all obtainable in survival!
Goop's Many Mobs
Changes textures for some of the mobs with new interpretations and designs
CorePerformanceFix x SortSmart
A high-performance optimization plugin focusing on entity-ticking efficiency and automated item-stacking and you can use SortSmart
HotbarPets [Slimefun Addon]
Unofficial 1.21.x port for HotbarPets. Keep custom pets in your inventory for cool buffs!
The Cursed Mod [TCM]
Adds unholy things that should not be in Minecraft.
Craftable Villager Spawn Egg
This datapack adds the crafting recipe that lets players create a Villager Spawn Egg using rare and valuable items.
Diverse Archaeology
Adds the God of "Neptune" in roman mythology.
Blazing Agenda
Player-created synced mob skins
Shulker Helmet Refreshed
Retextures the shulker helmet from supplementaries to match the style of Mobs Refreshed by Lukidon
No Totems
Removes totems from the evoker loot table, making them impossible to get in survival. perfect for servers if you want to ban totems
PandasSneezePlus
Increases baby panda sneeze rate and allows adult pandas to sneeze. Potentially dropping slimeballs.
That Bird That I Hate
Makes parrots randomly repeat what you said in a funny way!