Minecraft Java 1.21 Mods
Browse 260 free mods for Minecraft Java 1.21 — popular picks include You Can't Sleep, Safety is Nowhere, Slimes Everywhere.
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You Can't Sleep
A about bed sleep's horror mod
Safety is Nowhere
Dreams are real and so are nightmares. The world is corrupted, find the source of abnormalities.
Slimes Everywhere
Allows Slimes to spawn at night in any biome
Limitless World
LimitLess – Remove every limit. Break Minecraft your way. A lightweight Fabric mod that completely disables 9 of Minecraft’s biggest built-in restrictions.
Random Eventy
When creating a new world you have a new button, there you can configure the randomness of your survival world!
Bastion Reprieve
More piglins, less brutes. A compromise between 1.16.1 and modern Minecraft.
Under The Seas
Discontiued For Certain Amount Of Time A new gameplay to minecraft by exploring the darkness of the sea
LibraryCube
LibraryCube is a Minecraft plugin that generates an infinite, explorable library of unique chambers, each filled with deterministically arranged blocks based on a specific address.
BagelVulture's First Mod
a bunch of random additions that aren't quite vanilla+
Phitive
Many unique plants and other exciting additions
More Collectables by Memontanik
This Project Adds More Stuff to Collect, Craft, Use and Break! It could be a fun experience with this Project!
Beyond The Simulation
Grow a Lab Grown Brain that Connects Redstone Beyond the Distances, Dimensions, Worlds, Servers and Realities? (yes, connect redstone to real life)
twinkle popo mod
it adds twinkle popo realistic pikachu and realistic hellokity
Endless Villages
Every chunk is filled with villages, creating a unique survival experience focused on exploration and village-based gameplay so turn your Minecraft world into a place where only villages generate.

Speedrunnersbane
Making Minecraft more annoying for everyone. But mostly speedrunners.
Expressive Chicken
Expressive Chicken is a mod that adds new things with chicken.
Hedgehog Saga
Adds new decorative blocks, plants, worldgen features, and MUCH MORE inspired by Sonic.
Fight Back
Fight Back against Horror Mods with OP armour that grants effects like flight and invulnerability, tools that one-shot and insta-mine everything, a new dream-like dimension, new achievements, and more!
ChunkMix
Every chunk - New biome! Spice up your world!
Manipulated
A fresh new horror mod for NeoForge, 1.21.1. (from 5mo ago cuz i didnt make it public cuz its kinda stupit)
BulsciCraft
Enjoy this brand new mod that adds New Dimensions, Mobs, Items, Blocks, Unusual things and even a bossfight...
Object Impermanence
If you stop looking at something, it might disappear.
MagicFactory
Mod adding a new liminal space
Creepy Colorful
Creepers are now a colorful bunch thanks to Creepy Colorful!
Craftable Uncraftables And More!
This mod adds all the uncraftable thing to minecraft and a few extra things.
[End Replacer] - The Pee Dimension
Replaces The End with The Pee Dimension. Good for servers that ban The End.
Being Alone (BE)
This mod makes you feel alone... because you are...
Damage = new dimension
Makes it so that every time you take damage your dimension randomly changes (End, Overworld, Nether)
HereSkyReign
A paper server plugin to add the Aether World, the mythical sky reign, to any server.
Pointless Emeralds Stuff
Pointless Emerald Stuff that nobody asked for
Interesting avocado
Interesting and funny, but pretty complete, with blocks, items, structures, Easter eggs, dimensions—these are all imaginative ideas.
Biomes plus
Biomes Plus — 7 new biomes: foggy grove, lost forest, misty highlands, driftwood swamp, windswept plains with menhirs, olive grove, salt basin.
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!!!
Structures Everywhere
All vanilla structures now appear EVERYWHERE!
Survival+
Survival+ is a datapack that adds difficulty and suprise to Minecraft again. By adding tougher enemies and cool unique items. Along with a bunch of new mechanics and reworks of some old ones, causing you to relearn Minecraft in a whole new way!
No Strongholds / No End
Prevent access to the end by preventing strongholds from being generated.