Fabric Mods for Minecraft 1.21
Browse 31 free Fabric mods for Minecraft 1.21 — popular picks include Zombie Improvements, Zombie Horsemen, Brutal Nightmare : Insane Difficult.
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Zombie Improvements
Improves zombie leader and reinforcement mechanics and fixes a few bugs
Zombie Horsemen
Zombie Horsemen is a Minecraft datapack that introduces a new surprise event similar to the Skeleton Trap. When triggered, a zombie riding a zombie horse, equipped with an iron helmet, iron axe, and shield, will spawn to challenge players.
Brutal Nightmare : Insane Difficult
Minecraft too easy? Try this mods with nearly 40 modifiers - settings new mini bosses, which made minecraft become hard & insane. Enhanced hostile mobs' AI & Angry passive mob. Zombie place/break blocks. Skeleton,Spider,Creeper,Enderman.
Zombie Apocalypse Core [ZAC]
Necessity for zombie apocalypse modpacks. Day counter, Entity multiplier and entity spawn prevention (blocklist), day light resistance (no daylight burning), customizable zombie drops, zombies break blocks, and more.
Zombie Tactics
An overhaul of zombie AI, which allows them to break blocks and improves their tracking.
Midrian - Zombie Apocalypse
Turn your game into a Zombie Apocalypse!
Home Lawn Security
A mod that aims to add Plants vs Zombies' versus mode to the game.
Zombie UUID Preservation
Preserves randomized villager textures after zombification and curing.
CrazyZombie
This is a Minecraft 1.21 fabric mod. The main enhancement of the original zombies is to make zombies spawn in both the Overworld and the Nether Zombies no longer burn during the day, can swim in water, can place and destroy blocks to chase.
No Outbreaks
Tired of those Zombie Sieges? Let's remove them!
Better Rotten
BetterRotten adds a small but immersive way to recycle rotten flesh instead of letting it pile up in chests. Turn zombie drops into useful leather scraps, combine them back into full leather, and integrate the cycle into your survival progression. The mod
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.
Shogun's Blast - Undead & TNT
Explore haunted Japanese villages, battle explosive Oni Warlords, and defeat the Council of Leaders in this immersive RPG structure and combat mod.
Minecraft but Every Mob is a Chicken Jokey
Transforms most living mobs (e.g., zombies, cows, creepers) into chicken jockeys (also dragon jockey)
SG Mob Spawn
A mod that adds mob spawns for higher difficulty like illusioners, zombie horses, cave spiders, etc.
Toggle Baby Mobs
Craft an Age Potion to toggle mobs between their baby and adult versions. Works on villagers, zombies, cows, and many other entities.
Leader Zombie Tweaks
[OBSOLETE] Appearance & stat changes to leader zombies, addon to Zombie Improvements
S4mus Possession
Possess and play as many different Minecraft mobs, each with custom abilities, sounds, movement, and aggro behavior. Zombies, skeletons, illagers, wardens, breezes, endermen, wolves, piglins, pandas, and more all have unique mechanics.
Baby Zombie Removal
A mod that removes baby zombies made for fabric 1.21.8
Burvy's Zombies
Smart, Destructive, and Performant Zombies
Zombie Enhanced
Zombies are now more dangerous, with special items — from a pickaxe that breaks blocks to an anvil that stuns players.
[Y] Apocalypse Zombies
This project adds brand new Zombies straight out of the Apocalypse! Part of the [Y] Apocalypse Modpack. Currently still in development.
ConvertIT
Cycle between Zombie Villager and Villager with ease!
Zombieium
Zombieium adds configurable night-time zombie waves and an optional boss encounter with a red warning beam, fiery arrival effects, and unique drops.
Undead Alliance
Turn zombies into loyal companions with trust, personality, and smart AI. Recruit, command, and survive together in Minecraft.
Undead Transformation
Zombie transform into husk if died by the sun and skeleton transform into bogged if in contact with water for too long
Emeralds Galore
Emerald Ores and Zombie Villagers drop more Emeralds

Zombie Syringe
a syringe that can transfer zombie (husk,drowned) blood to villagers
Another Rotten Flesh To Leather Mod (1.21.4, 1.20.1) – New Conversion Mechanism
Once you fight off hordes of zombies, skeletons and other monsters at night, you will notice rotten flesh accumulating in your inventory. Rotten flesh is arguably one of the most useless items in the game, to a point where most players just throw it away. The item can be consumed to increase health, but it […]
Rotten Leather Mod (1.21.1, 1.20.1) – Create Leather out of Rotten Flesh
Rotten Leather Mod adds into the game a new mechanic, in which, players can utilise Rotten Flesh that is often dropped from the zombie and cook them into regular leather. Normally, players would gain an abundance amount of Rotten Flesh from their perpetuated battles with one of the most common mobs in the game, Zombies. […]
Zombie Horde Event + Anti Skybase Phantoms
Small server side fabric mod i made for my server