Minecraft Java 1.21 Mods
Browse 12,409 free mods for Minecraft Java 1.21 — popular picks include Hud Keys, Herobrine Horror Project, mobdangueons.
Updated daily
Hud Keys
A simple Minecraft Fabric mod that adds MOBA like visible key binds to the hotbar.
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.
mobdangueons
This mod adds new dungeon-themed mobs to enhance your Minecraft adventures with more danger and excitement.
Varied Mob Sizes
Randomly changes all mobs' size slightly for a more emmersive world!
Mo´Infected
the mod adds several types of zombies
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
CrashPanel | CrashCore
The ultimate No-Code engine. Elevate your server with hot-reload, node-based event scripting, plus full model and particle editors in one intuitive interface.
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!
More Mining Fatigue
makes elder guardians give the players in a 50-block radius mining fatigue every second instead of every minute.
tame every mob
Tame every regular Minecraft mob, control their behavior, store them in Mob Pockets, and upgrade them with custom equipment.
Everything You Want
Adds user suggested features like a powerful new End ore, bizarre mobs, strange structures, humorous poo-themed items, and much more for a chaotic and fun gameplay experience.
Eminem horror mod
A joke mod based on a friends idea that adds the creature from the Eminem meme and a few other items
not_alone.jar
This is a horror mod that adds entities to your world
VTMon (Cobblemon: Vtubers LATAM Edition)
Tus Vtubers favoritas de LATAM convertidas en Pokémon
NoMoreJumpscares
Removes the Elder Guardian curse effect when receiving mining fatigue
AdventureZ - Fresh Animations
Fresh Animations-style custom mob animations for AdventureZ. 20 mobs brought to life with smooth CEM walk cycles, weapon-aware attacks, and distinct personalities. OptiFine and EMF compatible.
Veil of Vines
A nature and magic mod that adds dozens of unique vine species. Harvest flowers to craft potpourri that repels hostile mobs, and adorn your builds with new decorative blocks. Explore, build, and survive with the power of plants!
TC315 Creature Set MC Edithion
A compilation of Monster Girls, and other creatures made by me, spawns around your world with dungeons and new structures
PerfPlusMob
PerfPlusMob brings performance boosts and essential QoL tweaks to Minecraft for Pojavlauncher players.
The Broken Script: Lost Geometry
add-on for mod the broken script
Carpet Permissions
Adds fine-tunable permissions for carpet (replaces op level check)
Dungeons of Doom
Adds new items, armour, and structures to minecraft!
Hunter's Market
Hunt monsters, collect loot, sell to the merchant, and be the first to earn 10,000 gold! The first player to reach the goal wins!
Configurable Difficulty
A server-side Minecraft mod that adjusts entity attributes based on their biome, dimension, and depth
MoreTrees (VeryIncompetentFish)
Natural trees made in VeryIncompetentFish his tree series
Explorer's Haven
Explorer's Haven is an adventure modpack enhancing exploration, biomes, dungeons, and visuals for smooth performance. Discover new landscapes, battle mobs, and enjoy quality-of-life features while preserving Minecraft’s core experience.
ArmorStand-Limiter
Problems with tps? Is it ArmorStand's fault? Use ArmorStandLimiter to prevent your server from crash
Plant Based
Adds alternate, vegan recipes for important items that would otherwise use animals ingredients.
Belgie's Compatibility
a mod that adds Compatibility between all of the mods released by belgie and his team
Selective Powers
A multiplayer power system where players are chosen by gods, gain unique abilities, and grow stronger through progression.
AI Pathfinder
Implements Pathfinding for your Custom Mob!

Useful Allays
It's like a level 1 beacon with wings!
You Shall Not Climb!
Takes away an ability to climb ladders from mobs that are not supposed to have it.
Better to Play/Better to Play Backport (MVS/MVS Backport)
A MC Mod, was many new Items/Blocks/Advancements etc. in your world added!