Minecraft Java 1.21 Mods
Browse 3,633 free mods for Minecraft Java 1.21 — popular picks include PhatLoots, Combat Expansion V4 REWRITTEN, Variating Mobs.
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PhatLoots
The official continuation of the PhatLoots plugin which provides highly configurable loot for all.
Combat Expansion V4 REWRITTEN
This mod adds new weapons, tools, mobs, mechanics and much more, while maintaining the vanilla style of play and compatibility with other mods.
Variating Mobs
Mobs can spawn with varied stats! Aswell as a few more related things.
[Cobblemon] Jet's Biome Besties
A Cobblemon Addon that is dedicated to adding cosmetic variants for pokemon dependant to specific biomes/climates!
Ice And Fire: Dragon Care
A comprehensive addon for Ice and Fire CE introducing ethical resource harvesting, dynamic bonding, and long-term dragon husbandry.
Phantomcatcher
Way to protect yourself from phantom spawning
Ekipa Mod
The mod adds a lot of different things related to the team, eg. Ice cream of the team and their extensive mechanics, drinks, party CDs, mobs (no nowciax), notebooks, boxes, phone cases and many other things.

Fish Fix
Amends hardcoded sea level assumptions to fix aquatic mob spawning.
Pulchra Occultorum
This was a mod all about Victorian Science, Carneval and Occultism. Features are put on hold for now.
Direbats
Adds bigger, annoyed bats that steal your stuff!
Settling Trader
Converts wandering traders into villagers as a way to populate new villages with different biome variants
True Boss Music
Adds much needed boss music to Minecraft's Bosses!
Mob Dice Attributes
Every mob. Every spawn. A fresh roll. A mod that dynamically converts mob attributes into a range using tabletop RPG dice mechanics.
SMP Silk Spawner
Silk Touch spawners implemented in a vanilla/smp friendly way! Fully configurable with different things that could happen with breaking spawners
Creeper Backguard
Make Creepers ignite only within your field of view.
No Skeleton ❌
Disable Skeleton in Minecraft by preventing its spawning and removing any that appear in the world
TradingPlus+
Enhances trading by adding over 280 new trades for villagers, providing a richer and more varied gameplay experience.
Epic RPG: Loot Sentinel
Blocks chest interaction when hostile mobs are nearby and targeting the player, enforcing combat before looting.
Prisma Craft
A massive project that greatly complements the idea of Prismarine and improves the mechanics of fishing. New tools, armor, blocks, mobs, mechanics and structures.
Allay, behave !
Tell your allays to stay still, and other QoL tweaks.
Pebblits
A mod created specifically to be ruined by Knarfy's audience. What could go wrong?
BedSheet
Carpet unofficial NeoForge port. Take full control over your game.

Ashen's Better AI
Improves mob ai, by adding mob jumping, a foodchain, and more!
LovelyLib
The robot-specific library shared by all Lovely Robot variants. Handles the robot type system, shared animation profiles, and save migration so that Legacy, Tribute, and Reboot don't duplicate core logic.
No Bats
Another mod that disables bats natural spawning
EternalAppetite
Allows players to keep eating, storing the excess saturation
NightTime
A horror and challenge datapack made for only the bravest to try.
Mob AI Commands
A standalone version of the commands added by Mob AI Tweaks mod
Better Birch Forest
Better Birch Forest adds new vegetation and more Saturatet colors to the Birch Forest. Also it adds Fireflys
Killer Bunny Name Tag
Naming a rabbit "The Killer Bunny" will turn it into a killer bunny
Cobblemon Otherside Spawns
Cobblemon spawns for the Otherside dimension from the mod Deeper and Darker
Horse Boat
Look at my horse, my horse is amazing! Don't leave your ride behind!
Synthetic Pokemon Pack
Adds Type:Null and Silvally to Cobblemon.
Golden Dandelion Backport
Adds the Golden Dandelion to earlier versions of the game
Craft Trial Spawner
Adds a crafting recipe for Trial Spawners
Middle-Earth Additions: Npc
A mod that transforms the citizens of Middle-earth into interactive merchants and traders.