Minecraft Java 1.21 Mods
Browse 513 free mods for Minecraft Java 1.21 — popular picks include Aloo Skill SMP, Opgrass, Somewhat Warm.
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Aloo Skill SMP
AlooSMP is a custom SMP plugin where each player bonds with a Potato Spirit companion (called an "Aloo") that gives them a unique class identity with passive buffs, 9 active abilities, and a skill progression system.
Opgrass
This datapack makes that grass drops op items
Somewhat Warm
Super Hot in Minecraft
More Bounce
This mod adds many new bouncy balls to minecraft for example the house ball spawns a ball wherever it lands its a fun goofy mod that you can add to your sever for more fun. This mod is to help minecraft on expanding there balls for not just having snowbal
Mixed crafts result
With this data pack, all your crafting results will be mixed up.

AllMaterialsAllowed
This is a mod based on the image meme of Minecraft streamers locking in to craft things that don't actually exist in the game. Basically, it allows you to craft a large assortment of items using any material.
RandEffects
A datapack that adds permanent random effects to all server members from a list of effects

dupe_hack (April Fools)
Adds minecraft:dupe_hack from the April Fools 'Voting Update', with some changes.
More Functional Storage Upgrades for ExNihilo
Addon for More Functional Storage Upgrades to support ExNihilo blocks
Player Mutations
A behavioral evolution system that mutates players based on their playstyle. Every cycle (default 3 days), the plugin analyzes player behavior and triggers mutations that fundamentally change how they play.
Lifecore
LifeCore SMP is a high-stakes Heartcore experience where players gain hearts through kills or face a 24-hour ban upon death.
DayNightFaction
A tactical survival plugin that forces players to choose between the light and the dark. Depending on their faction.
OUCH!!!
Make magma realistic and actually deal a little damage while holding.
Lethal Language
A plugin where if you say the forbidden letter/word you get killed!
Lafiński tuffiński (lafless)
Adds lafless the youtuber to the game!!!
Choas Randomizer!!
This 's a project that is fabric 1.21.1 , it makes that once you do /start , randomizing start , now drops get Randomized everytime a block 's made and crafting recipes changes everytick till you do / stop .
Capstone Enchantments
Capstone Enchantments adds Capstones: powerful, class feature chestplate enchantments
Wacky Enchantments
New, beautiful, tasteful enchantments for you sillyful needs
Random Stuff (W.I.P)
this mod adds a lot of random stuff
MagicFactory
Mod adding a new liminal space
NoChargedCreepers
Prevents charged creepers from appearing

SpyGlassMeData
Datapack that is used by the SpyGlassMe mod.
Craftable Totem Of Undying Recipe
Makes the TOTEM OF UNDYING Craftable!!!!
MaxTools
Perfect for a survival game with progression.
Chariz's Mayhem
A Minecraft Mod That Aims To Add Fun Things Into Minecraft, Such As New Mobs, Bosses, Weapons, Tools, Armor etc. Created By The Maniac Himself, DarkChariz
Jungle's Light Challenge
simple mod that damages you near light
StarPortal
This plugin is created referencing the Stargate saga, although the plugin itself is a way for players to transport themselves through portals.
Damage = new dimension
Makes it so that every time you take damage your dimension randomly changes (End, Overworld, Nether)
Randomness-moli
This is just a simple random drop and random enchantment, nothing more.---------随机掉落物和随机附魔仅此而已
Vegetarian - Challenge
This datapack makes eating meat bad and gives you bad effects to make you a vegetarian. I bet you won't survive this one tho.
Being Alone (BE)
This mod makes you feel alone... because you are...
Mahan's Mod
This Mod is a Random Mod Of What My World Will look like.
Echo Pearl
Echo Pearl, Never lose your way again.
oSzoukaua's: RTeaP
This mod adds a simple diegetic way to RTP(Random teleport) in-game without commands!
kʊɹs'd
loot chests spawn procedurally generated bekʊɹs'd items. Cursed in their own wɛɪj.
Limbus E.G.O Gift
Bring Limbus Company's E.G.O Gifts into Minecraft — 80+ accessories with unique effects, a gacha draw system, upgrade mechanics, and a resource pack