Minecraft Java 1.21 Mods
Browse 2,270 free mods for Minecraft Java 1.21 — popular picks include GUI Fixer, 1 Heart - 9 Lives, Acrophobia.
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GUI Fixer
Allows you to move slots in GUIs wherever you want
1 Heart - 9 Lives
All players have only one heart. You cannot respawn after the ninth death.
Acrophobia
Minecraft mod that aims to nerf flight with elytra, modded creative flight armors and other flight methods
Oozing magma
makes Oozing effect spawn Magma Cubes in the Nether
The Resonance
Where are your eyes? Cannot see? Then paint the world with sound. And face the horrors of the dark.
Titan Hammer
A legendary custom mace with Wind Launch, Dash Strike, passive buffs, custom crafting, and powerful enchantments. ⚡🔨💨
Seeded Dimensions
Adds a config to set per-dimension seeds!
Nerflytra - Nerf elytra boosting
Disable or discourage using rockets while flying, performant and configurable.
dumb skeletons
Makes skeletons hilariously bad archers.
SybSafetyFirst
Make Minecraft, just a little harder...
Raid Farm Fix
This datapack will return the raid mechanics from version 1.14-1.20.
Troll menu
The mod adds the admin menu for trolling (BETA)

Adrenaline Effect
A minecraft mod that adds an adrenaline effect which is triggered when the player reaches low hp.
B's BeePost
With this plugin, you can send messages and gifts via bees!
Griefcase
This mod adds many new ways to troll your friends, such as fake ores, remote tnt, jumpscares, and more!
Random Block Area
Dynamically replaces blocks around the player in real time with customizable radius, shape options, whitelists, and built-in protection for critical blocks.
Glacier Players
Mannequins that are designed to mimic real players in a server.
Beep Beep
boats beep when reversing, just like a truck
ProjectBFDI (Archive)
Adds BFDI stuff in minecraft! (No longer gets updates)

SpyGlassMe
Grow or shrink people with a Growing or Shrinking SpyGlass
Stormy Weather
Immerse your Minecraft world in endless rain with this lightweight datapack that locks the weather and keeps the storm going forever.
Sloths Display Entity Editor
Create, modify, and delete Block and Item displays, even in survival!
SENTI3NC3.JAR
https://www.patreon.com/c/TheMythmakersToolkit
RecipeBuff
Makes the game challenging with advanced recipes, and toughened mobs.
Random Inventory
This datapack randomizes your inventory by using loot from all structures and things in the game with a loot table.
Purely Beta
A 1.21 server datapack and resource pack for recreating Beta 1.7.3, and only Beta 1.7.3! No mods (required)!
EnchantedApple
Allows to craft enchanted golden apples
NoBurningMobs
Prevents mobs from burning during the day.
Survival to creative twist
Every 5 minuts you can choose one item , you'll get 1 of it
Meow Button
Dedicated meow button >w< :3 >~<
Mine = Random Entity
This plugin spawns a random entity when you break a block. You have to beat the entity to obtain the blocks drops.
Decay
The world is slowly decaying...
Tick Rate Randomizer
Randomly changes the Minecraft tick rate at regular intervals, creating unpredictable gameplay effects.
Cobbled Level Control
This server-side mod gives the server-owner full control over level caps on pokemons using permission nodes for absolute control. Perfect for a tailored player experience!
Feningland
A Mod Aiming to Revive the feeling of classic 1.12.2 mods by including lots of Dimensions,Biomes,Entites,Weapons and a whole lot more.
Eventron
A plugin that automates some events in your server for you and makes your server fun with random events!