Minecraft Java 1.21 Mods
Browse 12,367 free mods for Minecraft Java 1.21 — popular picks include [MobArena Addon] HavenArena - Extra Customizable Features, Escape The backrooms | Entity, MobHealthBars.
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[MobArena Addon] HavenArena - Extra Customizable Features
Add extra customizable features to your MobArenas, including new boss abilities and monster glow.
Escape The backrooms | Entity
A mod that adds 15 more entities from the original Escape the Backrooms game.
MobHealthBars
Adds dynamic healthbars to mobs without modifying their names
Care For Them
Bring Xoonglins to your world! Build homes, meet their needs, and watch their civilization grow. Fully customizable and perfect for modpacks!
Ben's Monster Energy Mod
All the Monster Energy you could ever want... and Beer too for some reason.
Better craftable beacons
A simple mod that adds two crafting recipes for the nether star so you can easily craft a beacon early without having to kill the wither
No attack time delay
Reverts combat system to pre-1.9. Supports 1.21.3
No Trader Llama ❌
Disable Trader Llama in Minecraft by preventing its spawning and removing any that appear in the world
Feathers & Golden Eggs
Chickens shed feathers and lay eggs--and occasionally, gold nuggets
MGAMES SCPs - DAY ZERO
Build your own site while discovering what's been left behind by the foundation! Many SCPs to Secure, Protect and Contain!
Effect Sounds│效果音效
Special sound effects will be produced when the effect is obtained.│當獲得狀態效果時會播放特殊音效。
More Passive Mobs
More Passive Spawns increases the amount of passive animals in your world by periodically spawning small groups of sheep, cows, pigs, and chickens in the Overworld. The datapack stays vanilla-friendly while making the world feel more alive and natural.
Muddy Pigs
A Datapack and Rescource pack that adds Muddy Pigs in the Swamp Biomes
MinMaxTrades
A paper plugin which sets the villager trade prices for enchanted gear to the lowest vanilla value, while setting the enchantment level for books to the maximum vanilla value.

Variant Lib
A library for data-driven mob variants. Usable by both datapackers and modders!
InstaKillMobs
Instantaneously kill mobs with hand.
HEY! Villager that is my bed!
Stops villagers from using your own bed!
Bedrock Jockey
This mod makes baby zombies seek out Bedrock exclusive mounts so they can become jockeys.
Bramble Mob
A parkour-based hostile mob in the Blaze & Breeze family
Elderly Guardians
Renewable sponges. Thunders convert Guardians to Elder Guardians
MineBeast [MCREATOR/OLD]
A RPG mod that brings back the fell that old orespawn and AoA had in a original way
Upgradeable Iron Golems
Craft upgrades for iron golems to unlock new abilities or just improve their stats.
thewatcher.jar (official)
Hello! I'm watching you! Here I am!
OP Mob Drops
Makes all mobs drop op loot
skillsystem
A classic MMO-inspired skill-based progression system for Minecraft. Features 40+ skills, 8-circle magic system with spellbooks and reagents, crafting quality tiers, thief skills, animal taming, and bidirectional gate travel portals.
Wither Shopkeeper
This creature will spawn in most biomes and hunt you down. It is not as bad as it looks though.
Hud Keys
A simple Minecraft Fabric mod that adds MOBA like visible key binds to the hotbar.
mobdangueons
This mod adds new dungeon-themed mobs to enhance your Minecraft adventures with more danger and excitement.
Mo´Infected
the mod adds several types of zombies
No Zombie Nautilus ❌
Disable Zombie Nautilus in Minecraft by preventing its spawning and removing any that appear in the world
Herobrine Horror Project
The best Minecraft horror plugin for 1.21.4 Spigot that lets you troll your friends or create a YouTube video with scary ambience sounds and horror effects.
Varied Mob Sizes
Randomly changes all mobs' size slightly for a more emmersive world!
Dynamic Performance
A lightweight performance mod that keeps gameplay close to vanilla with adaptive view distance, simulation distance, and mob cap based on the server’s MSPT.
Hobbit
This is a mod featuring the Man in the World of Hobbit! There is field to cover
Lost in Dreamland(迷失梦域国)
Add a series of new things.Including a new dimension.

Sniff Trail - Unique Rideable Sniffer
Automatic movement using a sniffer!