Fabric Mods for Minecraft 1.21
Browse 1,023 free Fabric mods for Minecraft 1.21 — popular picks include MobManagement, CleverCreeper, Villagers Tasks.
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MobManagement
This mod allowes you to prevent mobs from spawning with certain items.
CleverCreeper
Creeper Claims Cleverness! Aww Man!
Villagers Tasks
Enhances vanilla villagers with profession-specific tasks [1.21.9 - 26.2]
Grand Adventure
Takes you on a Grand Adventure - inspired by art and history
Cobblemon Black&White Battle Music
Adds music from Pokémon Black&White to Cobblemon battles
koper_mod
A chaotic Minecraft mod with unique bosses, broken armor sets, and a corrupted dimension a little unbalanced but fun as hell.
Creeping Cats
Creeping Cats is a cat buff mod that makes cats really scary for creepers. Whenever a cat is around, creepers don't explode.
HitPings
HitPing plays audio feedback when you land 3 block hits. A soft ping sounds on hits between 2.8–2.9 blocks, and a sharper ping sounds on hits at 2.9+ blocks helping you recognize 3 blocks and improve your spacing.
Size shifter/Antman origin
Adds the size shifter / antman origin to minecraft
Pavlovian Dogs
Wolves with a neural network, now you can train them with voice commands!
SpiderSense
SpiderSense - Minecraft mod that enhances the player's perception by providing visual and informational clues about nearby mobs. It is designed to help players detect and track hostile creatures. Fully operational on servers.
More Kittens
This mod makes a cat litter more realistic, by instead of breeding only 1 kitten, it can vary between 3 to 5 kittens
Happy Ghast Parking
Park your Happy Ghasts to make them stay completely still! A better Happy Ghast mod featuring increased flying speed and mid-air parking (perfect for building)
More Infested Blocks
V1.0.1-1.21-A Adds infested granite, diorite, andesite, and tuff with no special texture distinguishing them from normal blocks. Other texture versions available. Dev on all my projects will be paused for the duration of the BDS boycott against Microsoft.
Help Me Hardcore
Help Me Hardcore Adds All Kinds of Extra Challenges from Community Ideas to Full-Themed Updates for Your Hardcore Worlds or Even Hardcore SMP Servers!

BloodInfection999
Delve into a world ravaged by a terrifying blood infection, where once-peaceful creatures are corrupted and your own survival is constantly under threat.
Sniffers Sniffs Delights! (SSD) (A Farmer's Delight Add-on)
Allows Sniffers to dig up seeds from Farmer's Delight!
Bleu
Axolotls' "blue" variant becomes uninheritable; all blue axolotls will have been by chance! Chance is configurable, 1-in-1200 by default.
Turbo Happy Ghast
Increases the Happy Ghast's flying speed whenever a player is mounted on it.
Random Drops From Blocks (RDFB)
This mod making if you break blocks, you gonna get random stuffs, like blocks,tools,mobs

Old Legends
The remains of old legends wait to be discovered
Random Size Mobs
Mobs spawn with unique random sizes, affecting their HP, damage, and loot. Includes dynamic growth mechanics!
Pet Inventory
This lightweight mod adds personal inventories to tamed pets.
Simple Gravity Changer
This datapack adds a function to change the gravity of the world.

Allay Companion
Replaces the totem of undying with an animated allay entity that moves around with you.
Frogged
More frogs and froglights in Minecraft!
Thermia
An in-depth, dynamic temperature system for all creatures!
Minecraft Extra
A Minecraft mod that upgrades the combat and farming systems and adds some other handy features to make your life better.
ZApocalypse
ZApocalypse is a Fabric mod for 1.21.1 that turns every night into a zombie wave, with elite variants, blood nights, and a Zombie Lord boss. As the apocalypse escalates, zombies evolve unique abilities while other hostile mobs retreat deep below Y=25.
Saltcraft
A mod adding salt biomes, mobs, structures and blocks into Minecraft
Spawn Animations Cobblemon Compat
Compatibility for Spawn Animations with Cobblemon.
Floristry
A mod about bees and breeding, but not like that.
Leafs Crucible - Ice and Fire
Leafs Crucible: Ice and Fire - Explore a magical world of ice and fire, featuring unique temperature mechanics, powerful new weapons and tools, and challenging hostile mobs!
Better Happy Ghasts – Fly & Ride
Reimagined Happy Ghasts that make flight and survival more interesting

Always Drop Loot (updated)
Make mobs always drop exp and loot, regardless of cause of death.
More Fox
New foxes with new mechanics