Minecraft Java 1.21 Mods
Browse 2,241 free mods for Minecraft Java 1.21 — popular picks include Avaritia: Nirvana, PySpigot, oSzoukaua's: Real Height.
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Avaritia: Nirvana
Avaritia: Nirvana is a Minecraft mod built around the concept of "infinity." Inspired by Avaritia, it offers ultimate-tier equipment, tools, and materials that transcend the limits of vanilla gameplay.
PySpigot
A Python scripting engine (plugin) for Minecraft servers running Bukkit or one of its forks (Spigot, Paper, etc.).

oSzoukaua's: Real Height
A Datapack/mod that provides a simple chat-based UI to adjust your player height! both in Centimetres and Feet/Inches!
Kxffies TP
A No-Cheat Enabled Teleport Mod (made to work with Xaero's Minimap)
Chain Reaction Creepers
This mod makes creepers explode when they take damage from another explosion.
TNT Tweaks
Changes to TNT behavior like knockback, fuse time, and block breaking
Better Villager Trading
A client-side mod for better villager trading
Universal Totem
This turns everything into a Totem Of Undying, everything you hold will save you like a totem of undying.
Cursed Table Revamped
Allows curses to appear randomly in the enchanting table. Game rules can be used to further customize availability, including removing curses from the table, or adding treasure enchants such as mending.
Backrooms Through The Walls
Adds level 0, level 1, and the bacteria entity.
Dirt Conduit
Removes the Prismarine Block restriction from conduits
MaceBu
A fun, PvP-focused mace combat enhancement inspired by YouTuber Wambuu, featuring custom sounds and target highlighting.
Player Hitbox Fix
Fixes player hitbox collision issues allowing cobwebs, rails, and minecarts to be placed through players without misclicks or placement blocking
Minecraft But a Mob Spawns Every 10 Seconds
Minecraft, but a random mob will spawn on top of you every 10 seconds, good luck.
Grid World Generator
Exactly 89.67% of the world is gone! Take this challenge and try thriving in a world where terrain is sparse, resources are scattered, and every block counts. Can you survive in the void between the grid?
HaramCraft
This is a very small mod that lets players learn about the significance of halal food in Islam!
FNAF Dreams and Nightmares (Work Game)
Mod will recreate the creepy atmosphere of FNaF 4
One Billion Things
All your suggestions, in one mod. More of a showcase than anything.
Firework++ - Longer Craftable Durations!
Additional firework booster crafting recipes for elytra! Longer flight times with more gunpowder!
Hold Your Breath
When you go underwater in-game, you need to hold your breath in real life.
Finetunned Weaponry
This mod offers ALOT of new Items with unique effects
Craftable/uncraftable cowbwebs
Allows you to craft cowbwebs into strings, and craft strings into cowbwebs.
TNT Every 15 Seconds
Can you beat Minecraft while TNT spawns on you every 15 seconds? A fun way to challenge yourself!
Customizable Dragon AI
Useful Datapack to customize the Ender Dragon's AI
Slow Your Roll
A mod about slowing down game progression
Karma Shader Nightmare
A cinematic horror Minecraft shader pack that turns the dark into a living threat. Features dynamic fear mechanics, hallucination warping, drifting fog banks, a blood moon, desaturated colors, and its terrifying inverted sea ceiling.

Vertical Lunge
Allows the lunge enchantment to launch you vertically
Dinnerbone Gravity [Dinnerbone Floats]
The mobs named "Dinnerbone" fall upwards because they're upside down.
Backrooms: The Complex
A survival friendly, lore accurate backrooms mod with high quality visuals.
SKT's Improved Piglin
Improve piglin & piglin brute loot table when bartering or killed by player
Create: Enhanced Totem Productions
Renewable totems of undying, so you can cheat death with confidence!

Not A Toy
Adds things that are DEFINITELY not toys. Created for Modfest Toybox
BlockShips
build ships or airships out of blocks and sail or fly them smoothly - without client side mods or resource packs! Uses display entities to allow non-grid-aligned blocks
Tools of Steel
Not just another steel mod, give equipment progression more depth!
Glow Sheep
Adds Glow Sheep.
minecraft-gpt-god-plugin
This is the Minecraft GPT god plugin as seen on the BigYous Youtube Channel