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Minecraft Java 1.21 Mods

Browse 110 free mods for Minecraft Java 1.21 — popular picks include Temporal API, Jauml, Quantified API.

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Temporal API
1.21neoforge

Temporal API

Temporal API is the library for Team Temporal mods, other projects may use it as well.

15Mdownloads
Jauml
1.21.11neoforge

Jauml

Jauml is a lightweight configuration library for Minecraft mods, designed to simplify JSON-based config management

1.4Mdownloads
Quantified API
1.20.1fabric

Quantified API

A high-performance API for Minecraft mods, built to handle tasks efficiently, reduce lag, use GPU acceleration, smart caching, and multithreading - keeping your game smooth and stable.

1.3Mdownloads
CobbleBoss
1.21.1neoforge

CobbleBoss

A mod that allows you to infinitely add and customize your own exclusive Bosses in the Cobblemon world.

880kdownloads
ZeroCore
1.21.1neoforge

ZeroCore

A mod intended for other mod authors, it contains a revised multiblock API that support multiple client mods without performance penalities, a new new GUI system, a base BlockEntity implementation that simplifiy data syncronization and much more.

358kdownloads
Create: Deployer API
1.21.1neoforge

Create: Deployer API

A create library for addon-developers to simplify logistics

309kdownloads
CobbleLand Cobblemon Modpack
1.21.1fabric

CobbleLand Cobblemon Modpack

Looking for a new adventure? Try out our Fabric Modpack! Its an amazing server with hundreds of added pokemon to collect and trade! This modpack includes the bare necessities required to join the server including cobblemon, cobblemounts, and fabric api

28kdownloads
Create: Dimension, Steamworks Realm
1.21.1neoforge

Create: Dimension, Steamworks Realm

Create: Dimension, Steamworks Realm introduces a brand-new mining-focused dimension, designed for automation and large-scale resource extraction. This world is filled with rich veins of ores

25kdownloads
EpicGuard
1.7.2

EpicGuard

Bot protection system for Minecraft servers and proxies

17kdownloads
Lusk
1.20.6

Lusk

Modern, user-friendly skript addon, perfect for beginners and experienced developers.

16kdownloads
PlayerProgress
1.16

PlayerProgress

PlayerProgress is a Minecraft datapack that introduces a leveling system. Earn UP from activities like mining and combat to level up and gain new abilities and rewards.

16kdownloads
FacilisCommon
1.16

FacilisCommon

Library for Minecraft

15kdownloads
CommandBridge
1.20

CommandBridge

Connect all your servers together and bridge commands across your entire Minecraft network.

8.4kdownloads
MC-Reality Mod
1.21.4

MC-Reality Mod

this is a mod for Minecraft that seeks to transform the game experience into something closer to real life. It includes elements such as needs management (hunger, health, energy), an economy system, work, and the ability to interact with other player

6.7kdownloads
Energy-To-Emc
1.20.1forge

Energy-To-Emc

Energy to EMC: A high-performance bridge that seamlessly converts Forge Energy into ProjectE EMC for advanced alchemical automation.

6.1kdownloads
Lite2Edit
1.21.9fabric

Lite2Edit

Lite2Edit is a small Fabric mod that lets WorldEdit open Litematica schematic files (.litematic).

5.9kdownloads
goPaintAdvanced
1.21.5

goPaintAdvanced

The ultimate painting tool for Minecraft

5.9kdownloads
RandomDirtDrops
1.21

RandomDirtDrops

RandomDirtDrops is a fun Minecraft data pack that makes breaking dirt blocks drop completely random items from the entire game — from diamonds to dragon eggs! Perfect for chaotic survival challenges and OP item speedruns.

5.0kdownloads
Protect
1.21.4

Protect

A WorldGuard-like, modern world protection plugin made for API usage

5.0kdownloads
Qa Villager Extends & Waste Innovations
1.21.1neoforge

Qa Villager Extends & Waste Innovations

This mod enriches Minecraft with new villager professions, practical work blocks, optimized resource recycling, Qa rosegold, and more.

3.6kdownloads
PerWorlds
1.21.11

PerWorlds

A plugin that allows you to store player data per world

3.2kdownloads
Villager Job Tools
1.21.10fabric

Villager Job Tools

Client-only. Reroll any villager's trades (break/place their job site block) until wanted offers appear. Trades Finder, Auto Buy, Auto Sell. Keybinds: K = menu, R = start/stop.

2.9kdownloads
SkHttp
1.13

SkHttp

skript addon for http

2.8kdownloads
Redstone Additions
1.21.9

Redstone Additions

Best redstone&tech datapack, Super optimized, 55+ blocks (Block breaker, block placer, filters, conveyors, item pipes, breeder, generators, gates, chunk loader, wireless redstone, multiblocks, jetpacks and so much more ! )

2.8kdownloads
Hopplet (Hopper Filters)
1.21.8

Hopplet (Hopper Filters)

Expressive hopper filtering, written as plain text. The most powerful plugin in this domain. Filter by any item property. Extendable via a strong developer API.

2.4kdownloads
PySpigot
1.16

PySpigot

A Python scripting engine (plugin) for Minecraft servers running Bukkit or one of its forks (Spigot, Paper, etc.).

2.4kdownloads
Replant+
1.21fabric

Replant+

A lightweight and server-friendly mod that automatically replants crops the moment you harvest them.

2.2kdownloads
Customizable Dragon AI
1.20.3

Customizable Dragon AI

Useful Datapack to customize the Ender Dragon's AI

2.2kdownloads
OpenJavascript
1.18

OpenJavascript

Create custom menus, commands, plugins, systems, basically anything with scripts in Javascript! With multithreading and Folia support! Everything is fully documented in the documentation!

2.1kdownloads
ManualTotem
1.21fabric

ManualTotem

A simple mod that helps with manual totem placement by automatically moving your cursor to a totem when you open your inventory.

2.0kdownloads
Draventh Ores
1.21.8fabric

Draventh Ores

⚒ Advanced Tier Ores & Equipment This mod expands Minecraft’s survival progression by introducing 15 new late-game materials, each with full armor and tool sets. The goal of this mod is simple: Extend progression beyond Diamond and Netherite with a struc

1.8kdownloads
More Villages Datapack
1.21

More Villages Datapack

Adds more villages to the game.

1.6kdownloads
GregTech Modern Bugs Fix
1.21.1neoforge

GregTech Modern Bugs Fix

Fix some bugs of GregTech CEu Modern

1.5kdownloads
Kappa's AntiCheat
1.21.5fabric

Kappa's AntiCheat

A lightweight Fabric anti-cheat designed for high performance on large-scale servers.

1.4kdownloads
Fruitbridge
1.21fabric

Fruitbridge

This mod contains Fruitbridging utilities to assist players. Features are designed for both the Distance and Java 12b leaderboards.

1.2kdownloads
Lag Detective
1.21.11fabric

Lag Detective

Lag Detective is a lightweight diagnostics mod that helps answer where the lag is coming from.

1.1kdownloads