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Minecraft Java 1.21 Mods

Browse 316 free mods for Minecraft Java 1.21 — popular picks include Loler's Gems, AI Friend by Kurzer, Peaceful Silverfish.

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Loler's Gems
1.21neoforge

Loler's Gems

Adds mob gems that have certain abilities and/or perks! (WIP)

154downloads
AI Friend by Kurzer
1.21.1fabric

AI Friend by Kurzer

AI Friend adds a new NPC to Minecraft that communicates with you using real artificial intelligence via the OpenRouter API. Ask it anything, give it tasks — it will respond, move, and interact with the world!

153downloads
Peaceful Silverfish
1.21.1neoforge

Peaceful Silverfish

Peaceful Silverfish lets silverfish spawn from vanilla infested stone even on Peaceful. Great for Create farms and contraptions, but works perfect in vanilla too. Includes an option to mute silverfish sounds so your base stays quiet.

151downloads
NoCollision
1.21.10fabric

NoCollision

NoCollision allows you to disable or fine-tune collision between players, mobs, and players vs mobs.

151downloads
my-bot-mod
1.21.4fabric

my-bot-mod

Carpet-style fake players (bots) for Fabric 1.20-1.20.4 - spawn & control bots, non-blocking A* pathfinding, a Command Baton to send them anywhere, skins, inventory & ender chest access, and bots that persist across restarts.

149downloads
Sculk Eye
1.21.11fabric

Sculk Eye

Adds a new Sculk Eye Block - scans entities of a given type in a given radius and emits redstone signal based on the count

147downloads
RealMobScale
1.21

RealMobScale

Realistic animal scaling based on real measurements | light-weight plugin.

141downloads
Harmony I
1.21.1fabric

Harmony I

A seamless and enjoyable modpack that transforms Minecraft with well-balanced development, fresh mobs, and mechanisms. Bronze progression, explore structures, complete quests, and dive into a world where every mod tastes like vanilla.

141downloads
RecipeSpawnerMob
1.21.8neoforge

RecipeSpawnerMob

Show recipe For crafting mob spawner

140downloads
Skylife
1.21.4fabric

Skylife

A Skyblock with the goal to make everything different (at least a bit)

137downloads
Dr.Stone : Legacy Of Petrification
1.21.1neoforge

Dr.Stone : Legacy Of Petrification

A French-made Minecraft mod inspired by Dr. Stone, featuring pottery, depetrification, and more.

135downloads
Lethal Breed
1.21.11fabric

Lethal Breed

Adaptive predators that break through walls and build bridges.

133downloads
Items, Crafts & World of the Realms of Runeterra
1.21.11neoforge

Items, Crafts & World of the Realms of Runeterra

This project introduces all the items, blocks, abilities and other gameplay mechanics not related to the world generation provided by the Core Package of Realms of Runeterra: A Tale of Relative Dimensions

131downloads
Biznesmod
1.21.8fabric

Biznesmod

This mod adds new biomes, a new villager proffesion, new mechanics (upgradable abilities, collecting iron dust to make iron ingots, etc...), new custom structures (10+), a TNT cannon which shoots tnt where you look and some new redstone components.

129downloads
just let me do it
1.21.11fabric

just let me do it

A Copper Golem based mod powered by OpenRouter AI that can build and interact with your world. Inspired by Purplers video.

125downloads
Reawakened End
1.21.1neoforge

Reawakened End

An end update for Minecraft finally! Created by Pjluna and ShadowB.

124downloads
RadialHotbarMOVE
1.21.5fabric

RadialHotbarMOVE

A console-style radial item wheel inspired by Animal Crossing and GTA V to redefine your inventory navigation.

123downloads
StaySmall
1.13

StaySmall

A Lightweight plugin to keep your mobs small and cute forever!

120downloads
Enlivened End
1.21.1neoforge

Enlivened End

brings me life to the end with new blocks, biomes, items, and mobs, all in a vanilla-style way

118downloads
Economy Machina
1.20

Economy Machina

Economy Machina turns everyday gameplay into a living economy. Mine a diamond, catch a fish, tame a horse, survive a creeper — every action has a chance to pay out. No commands to learn, no tasks to complete. Just play.

115downloads
Player Detector
1.21.11fabric

Player Detector

Redstone block that detects if a player is standing on it

114downloads
CREEPER ANTI LAG
1.21

CREEPER ANTI LAG

Advanced anti-lag plugin featuring TNT protection, intelligent item cleanup, mob optimization, lag machine detection, and real-time TPS monitoring.

107downloads
Resourceful Sheep
1.21.1neoforge

Resourceful Sheep

A customizable mod that turns sheep into walking resource generators.

105downloads
Renewable Survival
1.21.11

Renewable Survival

Makes All Items Renewable. Adds crafting or mob drops.

104downloads
THE HORRORS BUT BETTER
1.21.8neoforge

THE HORRORS BUT BETTER

THE HORRORS adds 4 new biomes more blocks more crafting tables like the de-radioactivator and the improved smelter and the fabricator and it adds more mobs and it is only to get updated more! updates: the start ,NUCLEAR WARNING!!!!!

103downloads
Teleport Spyglass
1.21

Teleport Spyglass

Sneak + Use Teleport Spyglass to instantly teleport you and your animals back to your bed.

99downloads
Cobble Helper
1.21.1neoforge

Cobble Helper

Cobble Helper adds a helpful mob that automates cobblestone generation by working directly at a Cobblestone Generator. The mob harvests cobblestone for you, turning a simple early game setup into an efficient automation solution without complex machines.

98downloads
Project Tiger
1.21.8neoforge

Project Tiger

This is a light weight w.i.p mod with new buildings and blocks

98downloads
ArmadilloSleeper
1.21

ArmadilloSleeper

Sends Armadillos at XP Farms into Sleep to make TPS better but still make XP Farms very good!

93downloads
Chicken Jockey Plus
1.21.8fabric

Chicken Jockey Plus

Adds commands to summon different variant jockeys

93downloads
Void_Filler
1.21.1neoforge

Void_Filler

Void Filler is a technology‑focused Minecraft mod built with an engineering‑driven approach to architecture, system design, and scalability.

90downloads
Petrova Wastelands
1.21.1neoforge

Petrova Wastelands

Petrova Wastelands: An Interstellar Odyssey In a universe where the stars are fading, heat is no longer a resource—it is your only hope for survival.

87downloads
THIS
1.21.1neoforge

THIS

Port of the Chickens mod, as well as roost!

87downloads
Copper Golem Reforged
1.20

Copper Golem Reforged

Plugin that adds configurable copper golem upgrades with separate diamond and netherite behaviors

86downloads
Nonsense
1.21.8neoforge

Nonsense

A new dimension with unique and creative biomes ...

86downloads
UniversalMobFoundry
1.21.5fabric

UniversalMobFoundry

New generation of generators! You can buy monsters, simulate their loot, and upgrade the generator.

86downloads