Minecraft Java 1.21 Mods
Browse 1,567 free mods for Minecraft Java 1.21 — popular picks include Air Puffers, EnchantedHarnesses, Bear Traps.
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Air Puffers
The mod that adds Air Puffers to your game
EnchantedHarnesses
Faster Happy Ghasts with speed customization & a custom enchantment for harnesses
Bear Traps
Adds Bear Traps to the game, they can be used to damage mobs that step on them and keep them in place
Enstracted load
This mod expands the world of Minecraft by introducing extinct creatures that once roamed the lands, including legendary beings like the Whale and the massive Guardian Titan. Discover the secrets of a lost era and face entities that time forgot.
Illusioners (Paper)
Adds an improved version of the Illusioner mob to PaperMC servers!
NeoPasterDream
Also known as the NewPasterDream, it is a port of the original mod to the 1.21.1 NEO loader, and has been restructured to make it more oriented towards adventure themes.
MorphMaster
This Datapack allows you to morph/transform in any mob/item/block in minecraft
The MegaStorm
Enter the eye of the Storm, this is an Cobblemon datapack that adds Mega Evolutions to Pokémon that deserve, need, or just don't have one.
Lava Chicken Boss
Adds a new boss and an exciting battle with him, as well as his minions and some items.
Draconia The Fourth
Fantasy modpack focused on dungeons and creatures
Electric Boogaloo
Adds a new zombie dancing boss, Electric Boogaloo with his iconic Backup Dancers from the Plants Versus Zombies Games
Project Jujutsushi
A datapack that is dedicated to the Jujutsu Kaisen anime/manga.
Universal Trinkets
Modular, command-powered trinkets for mapmakers, mod-pack devs, and power players.
Harder
Increased Damage: Boosts mob damage based on the number of days spent in the world and a cuztomizable percentaje. More+
Dragons Revamped
Highly difficult Ender Dragon fight with custom terrain, attacks & abilities
JOJO - stone block crusaders
Many features from the popular manga/anime jojo's bizzare adventure (jjba)

O's enderite
Adds new ores, tools, mobs, blocks and structures based on Enderite — a powerful resource from the End.
Monsters&Machines
In a world devastated by greed, humanity hides underground. As heirs of a technological past, you must emerge, face monsters, and use forgotten machines to rebuild civilization on the surface.
Mob HeadSteal SMP
Collect player heads on kill and unlock powerful abilities using custom mob heads in intense PvP combat.
SC Final Adventure - Machines
Hunt bosses, farm their essence through Easy Mob Farm and Create New Age, and craft your way to the End in a guided 1.21.1 factory-and-adventure pack.
Shaders
A client-side Fabric mod that adds customizable animated rainbow and gradient outline effects to Minecraft entities, players, and held items for visual customization.
Savage Cyclopes Mod - Nether & End Edition
This mod adds multiple new Cyclopes to the game, including an Evoker-type mage, and a super-strong Piglin variant. This mod also includes unique items dropped from the cyclopes, like a Totem of Conjuring. Forge support coming soon! - MOD HAS BEEN MERGED
NeoBB - BlockBattles
A better version of Block Battles, where multiple players compete in a turn-based game, similar to chess or card games.
Arkobia 3
Third installment of the Arkobia modpack. This time in version 1.21.1 with around 200 mods. Lots of mobs, lots of dungeons, lots of content to keep you entertained. We've got a little bit of everything.
Random Events
Random events occur periodically to keep the players challenged.
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!
Perfect Gen
This modpack redefines the experience of exploring and reshaping the world. Packed with light RPG elements, this pack brings adventurous spirits together with captivating quests, mythical creatures and immersive world-building.
Familiar Fascination [Cobblemon Addon]
An unofficial addon for Cobblemon made by Lapori. It adds Familiars from a project called Familiar Fascination. Enjoy!
GTA Horse Logic
Horses smoke when damaged based on health, then explode dramatically. Inspired by how cars behave in GTA.
Cataclysmic Ascension
Cataclysmic Ascension is a high-powered Minecraft 1.21.1 modpack that challenges players to rise through a world of chaos, monsters, magic, and ancient relics, combining intense combat, deep progression, and immersive exploration across dimensions.
Summoner Mod
A mod that adds 4 bosses and 4 structures. Almost no dependencies!
One Enough Damage
Freely adjust mob damage, hardcoded damage and many skill-based damage.
ROLO Edition
Dive into an epic Minecraft RPG adventure! Choose your class, explore magical lands, complete quests, fight custom mobs, and level up with skill trees. Discover dungeons, secrets, and factions in a rich, story driven world.!
Headsman´s Edge
Added the Headsman´s Edge enchantment for axes. It allows you to obtain mob heads when killing them.
The Angry Ghast
Three new Ghast themed bosses, one for each dimension
oCode-AnarchiaBosses
Create custom bosses with skills, attributes, equipment and more!