Minecraft Java 1.21 Mods
Browse 3,633 free mods for Minecraft Java 1.21 — popular picks include Harder Life, Zombies Evolved, Stellaria.
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Harder Life
Makes the game slightly harder while reimagining some vanilla features
Zombies Evolved
Implements many new zombie variants to bring about a greater sense of difficulty and challenge

Stellaria
A mod dedicated to fighting enemies in a space-like environment!
30M+ Villager Names!
Adds over 30 million random names to Villagers, since 1.17! I wish I was joking.
DropBar
DropBar turns your XP bar into a Mob Radar. New v2 style detection pips.
Arctics Undertale Souls
This mod was made from an idea I have had for a long time where you can be a human and or monster from Undertale. You can use Monster or Human magic to make your way through the world. You can either be enemys or friends its your choice.
Simple Immortal Pets
A single mixin mod that makes all tamed entities immortal.

Oaks Frontier
An entire overhaul on how you play minecraft
Types And Variants
A Mod that adds more variations to mobs
Corrupted Horizons
Add Mini-Bosses! Increase Difficulty, Earn Rewards And Begin Your Adventure! 🧭⚔️
MineableTrials
Harvest trial spawners and vaults!
Baby Zombie Removal
A mod that removes baby zombies made for fabric 1.21.8
Unholy Mobs
Randomly empowers hostile mobs with powerful variant types when they spawn, making them significantly tougher.
Saddle/Bundle/Lead/DYE changes
Ride any mob, steal from any mob & leash any mob.

Chickens Lay Anything
Configure what items chickens lay using loot tables!
Pick & Trade
Upgrade your trading experience! Features a custom parchment interface that lets you see all villager offers instantly and choose specific enchantment levels without the hassle.
All mobs are boatable
All mobs can be put into a boat
No Creeper Explosions
Stops creepers from damaging blocks with their explosions.
TC Battle Growth
Gain experience immediately while fighting, instead of the old experience gain logic.
Dark Christmas
Face the horror of DARK SANTA!
What you got there?
This mod adds a client-side nametag that displays every enchanted book trade for each librarian villager.

Axolotl Drops│美西螈戰利品
Axolotl will drop Tropical Fish when killed.│美西螈被擊殺時會掉落熱帶魚。
Raid Farm Fix
This datapack will return the raid mechanics from version 1.14-1.20.
RacesPlugin
This is a plugin for Minecraft that adds races
Custom Entity Leveling
A highly customizable mod that enables mobs to gain "levels" similar to elite monsters.
ProtectMyPet
A plugin that allows you to disable damage to your pet.

Create: Craft 'n Extras
Create: Craft 'n Extras is a lightweight, vanilla-friendly addon for the Create mod that bridges the gap between raw materials and your building palette. It eliminates tedious crafting table grid-spamming by introducing logical, high-efficiency mechanica
Robot Legion
Build a steampunk robot army. Workers automate jobs while combatants fight beside you through three boss dungeons. Trade with engineer villagers for rare parts.
Helmaroc King
This datapack adds Helmaroc King with custom mechanics from Zelda: The Wind Waker & Four Swords Adventures. No resource pack required

TeamWork
Adds Multiple interactions between hostile mobs, making them do, well, Teamwork
poopool
Additional mobs, updated mob mechanics, & cat_jam. Also comes with voice chat, essential & performance mods.
Glacier Players
Mannequins that are designed to mimic real players in a server.
Light Suppression Wand
Get full control over light-emissive blocks.
Oozing magma
makes Oozing effect spawn Magma Cubes in the Nether
Disable Zombie Sieges
Disable Zombie Sieges from spawning and messing up your village in all overworld biomes.
Altitude Sickness│高山症
Mobs occasionally suffers from oxygen deprivation at high altitudes.│生物在高海拔地區偶爾會遭受缺氧的困擾。