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Minecraft Java 1.21 Mods

Browse 2,241 free mods for Minecraft Java 1.21 — popular picks include HeadBlocks, Cobblemon Boosters, Jeck230NOTREALWORLD.

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HeadBlocks
1.20

HeadBlocks

Hide heads in your world and let your players find them to earn rewards. Perfect for an Easter event.

2.1kdownloads
Cobblemon Boosters
1.21.1neoforge

Cobblemon Boosters

This is a Server side mod that adds different types of timed boosters to your server. These boosters can be used to increase the chances of finding Shiny Pokemon, or increases the catch rate!

2.1kdownloads
Jeck230NOTREALWORLD
1.21.11fabric

Jeck230NOTREALWORLD

AI-generated horror mod that adds the mysterious entity Jeck230, disturbing sounds, and a strange “not real world” atmosphere.

2.1kdownloads
Sizechange
1.21.11

Sizechange

This Datapack add some totems and shields that when held make you big or small, and they are expensive.

2.1kdownloads
Project: Explosive
1.21.1neoforge

Project: Explosive

Adds realistic explosions while keeping Minecraft’s vanilla style.

2.1kdownloads
Fleecifer
1.21.8quilt

Fleecifer

Turns all sheep hostile...

2.1kdownloads
Sculk Contagione
1.21.1fabric

Sculk Contagione

Makes Sculk more, lets say, invasive

2.1kdownloads
Armaments
1.21.1fabric

Armaments

Adds a few new unique and interesting weapons to the game

2.1kdownloads
Nuke Plugin
1.21

Nuke Plugin

A project based on cubicmetre's orbital strike cannon

2.0kdownloads
Amai's Aimassist
1.21

Amai's Aimassist

Plugin That adds /aimassist to game (if player have permissions)

2.0kdownloads
BiomeBetray
1.21.1

BiomeBetray

Biomes occasionally and silently swap your hotbar items with random ones from your inventory when you enter them :trollface:

2.0kdownloads
Color Only Challenge
1.21.10

Color Only Challenge

Beat Minecraft after being assigned 1 of 10 colors. You can only break blocks that match your color, making every run chaotic and completely different.

2.0kdownloads
Reaper's Scythe
1.21.5

Reaper's Scythe

Introduce the legendary Reaper's Scythe, an end-game weapon with permanent combat buffs, a devastating right-click AoE attack (Wither II), and an on-kill speed boost. Highly configurable.

2.0kdownloads
Unusual Precipitation (Rain)
1.21.5

Unusual Precipitation (Rain)

This datapack rains random items/mobs/projectiles from the sky!

2.0kdownloads
Potatomod
1.21.1neoforge

Potatomod

The potatomod is a funny and unlogical mod.

2.0kdownloads
Ravents
1.21.1fabric

Ravents

🗸 Ravents for custom mechanics. Design multi-wave raids with complex triggers, create unique mobs with modified stats, gear, and mounted towers. Spawn control: Replace vanilla mobs or add custom copies.

2.0kdownloads
Everything is #dirt
1.21.4

Everything is #dirt

'It's all dirt?' "Always was" Everything is tagged as dirt, glhf

2.0kdownloads
Mineable Spawners
1.21.6

Mineable Spawners

Makes spawners and trial spawners mineable (ONLY!) with a silk touch netherite pickaxe

2.0kdownloads
ItemDuper-Pro
1.21.7fabric

ItemDuper-Pro

Perfect for players who want convenient item duplication with modern improvements and reliable functionality.

2.0kdownloads
Parryable Projectiles
25w04a

Parryable Projectiles

A datapack that makes all(with exceptions) projectile parryable, like the ghast fireball.

2.0kdownloads
the broken script two
1.21.1neoforge

the broken script two

The Broken Script Two is a dark adventure mod for Minecraft 1.21 that shatters our very perception of the world. You play as the Scriptbreaker, a wanderer with the power to alter the code of reality. Experience stories intertwined with nightmares.

2.0kdownloads
linecraft
1.21.11fabric

linecraft

Experience Minecraft in a 3-block wide line!

2.0kdownloads
TargetLock
1.21.8fabric

TargetLock

Press J to instantly aim your camera at the nearest living entity within 10 blocks. If no entity is in range, a message will appear on your screen letting you know.

1.9kdownloads
Vanilla Backrooms
1.21.11fabric

Vanilla Backrooms

Vanilla-Backrooms is a server-side only Backrooms mod based on Polymer

1.9kdownloads
Big Fungus
1.20fabric

Big Fungus

Grow thick fungus trees by planting fungi in a plus shape

1.9kdownloads
Enderman Death Silence
1.21.8neoforge

Enderman Death Silence

Enderman will stop their long scream when they die. Highlighy optimized mod that provides a minor satisfying improvement.

1.9kdownloads
Totem of Null
1.21.11fabric

Totem of Null

The Totem of Null, From Unstable SMP which when popped, Tagged players die.

1.9kdownloads
Breaking One Block Breaks All The Blocks
1.21

Breaking One Block Breaks All The Blocks

If you break a block... it breaks every block in a 50 block radius.

1.9kdownloads
InvisibleKiller
1.21

InvisibleKiller

InvisibleKiller is a lightweight Paper plugin that replaces death messages when the killer was invisible, preventing players from knowing who killed them.

1.9kdownloads
Make It Rain!
1.21.9fabric

Make It Rain!

Client-side mod that adds rain to normally dry Overworld biomes

1.9kdownloads
Orbital Strike Arrow
1.21

Orbital Strike Arrow

This project adds the Orbital Strike Arrow, but with commands! This was inspired by Flowtives Arrow Cannon in Heartless Horizons.

1.9kdownloads
Toxic Mod
1.21.3fabric

Toxic Mod

A mod that is extremely toxic for no reason

1.9kdownloads
Nether Infection
1.21.8neoforge

Nether Infection

The Nether can infect your world !

1.9kdownloads
Titan SMP
1.21

Titan SMP

A Plugin with Custom Abilities.

1.8kdownloads
The Game Crasher
1.21.9

The Game Crasher

Instantly crash minecraft with 1 command on any PC! (Not a lag crash)

1.8kdownloads
BlockDropRandomizer
1.21

BlockDropRandomizer

This plugin/mod turns every Minecraft world into a unique random‑drop challenge where each block-type drops a random Item.

1.8kdownloads