Minecraft Java 1.21 Mods
Browse 3,622 free mods for Minecraft Java 1.21 — popular picks include Bob's Datapack, Stream Control, MobGrowing.
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Bob's Datapack
This datapack is basically a few weird addons that I added to minecraft while I was sick and off my meds. It adds (semi) realistic injuries for players and mobs and a few other things.
Stream Control
Stream Control lets your Twitch chat control Minecraft in real time with movement, actions, custom key inputs, and Bits-based mob spawns.
MobGrowing
Mobs fight each other, growing stronger by defeating their opponents.
NoMob-Cows
NoMob-Cow — Completely removes cows from your server by preventing spawns and purging existing ones.
NoMob-Allays
NoMob-Allays— Completely removes allays from your server by preventing spawns and purging existing ones.
invcibees (water)
makes bees invicible to water and regenerates them while in their hive
Two-Dimensional Foil
A mod that adds a two-dimensional foil weapon from The Three-Body Problem. Drop it to collapse blocks and creatures into an irreversible, mirror-like 2D plane within a configurable radius. Requires Fabric API.
Chaos Hunter
A chaotic Minecraft datapack that turns every mob kill into a randomized effect lottery.
PhantomBonk
Removes Phantoms with customizeable SpawnReason Check.
mob_duplication
Ready for some real chaos? This data pack doubles the madness in your Minecraft world! Now, every time you attack a mob, it splits into two absolutely identical copies.
happy variations
A minecraft datapack which randomises the size and speed of happy ghasts
Only Jetpacks
This mod adds jetpacks that the player can use to fly around, as well as a new way to play the game where you can make it where every single mob in Minecraft has their own jetpack, creating a world of chaos.
mc is too ez
A survival difficulty mod that makes Minecraft harder, more punishing, and less forgiving.
Mob Rods
A Minecraft Paper plugin that gives players fishing rods to spawn mobs.
Entity Controller Blocks
Control any entity's movement, rotation, and actions with just a few simple blocks.
SIXsBoom
PvE creeper survival arena minigame with custom wave system

Scute Force
Craft mount armor with scutes!
DivineCows
This is a paper/spigot plugin that punishes a player if he/she kills a cow.
PetCore
Cozy companion pets for Paper: adopt from a YAML catalogue, follow/stay/home behaviour, an owner-defined pet home, bonding with tiers & rewards, cozy cosmetics (personalities, titles, emotes), and token gifts. Standalone, EN + NL.
Buddy Beast
Find and tame your own loyal companion creature that remembers you across sessions. Toggle between following you everywhere or guarding a spot, with pathfinding, swimming, and a visible health bar — its bond persists through reloads and server restarts.
Bonehead Aim
Bonehead aim adds a configurable accuracy level for skeletons.
Soul Works Mod
This is a mob spawn utility mod.
Wandering Trader Summoning Ritual
Convert a villager to a wandering trader instead of waiting!
Mood Contagion
Mobs gain a hidden emotional state (calm, panic, or rage) that spreads through same-type herds and decays. Hit one sheep and the flock stampedes; enrage a wolf and its pack turns. Server-side, Paper/Spigot/Bukkit/Purpur 1.21+.
speartop
A competitive spear kill leaderboard plugin for Paper servers. Top 3 players earn exclusive rank spears with powerful enchantments — lose your rank and lose your spear.
Push Mobs
This Mods Add The Function to Push Mobs when you Right-Click On Them!
Minestuck: Cascade
A Minestuck addon that adds new dimensions, the ability to time travel and the ability to play as trolls.
Damage Dummys
Adds Damage Dummys for each tier of armor that display how much damage was delt to them
Rift Wars SMP
Team-based PvPvE SMP gameplay with rifts, timed captures, artifacts, instability, and a final breach event.

Hunger for mobs
This mod adds a hunger system that a player has for a specific set of creatures, but in a different way.
NoMob-Axolotl
NoMob-Axolotl— Completely removes axolotls from your server by preventing spawns and purging existing ones.
MashStrikeDrops
The plugin is aimed at event servers, crates-style mob encounters, grind zones, boss-lite content, and custom reward systems without needing MythicMobs or a larger RPG stack.
Effective Carpets
Different carpets will provide different effects for entitys on it.
Simple Decoys
This pack adds decoys that you can craft and customize
CobbleCrops
Farming Cobblemon crops the Vanilla way.
Mod but my Friends decided what's in it
lots of stuff, a huescape dimension, dragons, epic cave biome with game-changing mob, eldritch horror spider, Son Goku and more!!!1!!!