Minecraft Java 1.21 Mods
Browse 133 free mods for Minecraft Java 1.21 — popular picks include MapProtect, Planet - Border teleport, twinkle popo mod.
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MapProtect
MapProtect is built to work alongside automated map rotation systems, allowing FFA servers to maintain clean, reusable arenas without requiring manual resets.

Planet - Border teleport
Border-teleport mod: teleports entities crossing world borders (±326) to opposite side. Perfect for 1:326 Earth maps. Open-source (remix allowed, but must keep code open).
twinkle popo mod
it adds twinkle popo realistic pikachu and realistic hellokity
LiveJava
a VS Code-powered Web IDE that lets you build multi-class, hot-swappable native Java plugins instantly with zero reloads and automatic dependency injection.
Large Structure Lib
Library for large structures, including enormous jigsaw structures.
Fools Rise Tweaks
Small mod for Fools Rise modpack! Added progression for modpack and some more!
World Persistence
A fabric mod that adds more immersion to the static minecraft world.
TerraLib
Library for the mod "seasons" made by Elias
Craftable Uncraftables And More!
This mod adds all the uncraftable thing to minecraft and a few extra things.

Really Cooking
Cooking in Minecraft has always been simple, but not anymore!
Enemy Tracker
Time to Detect the Threat and Enemies!
Tom's Loot (Dp Edition)
This datapack adds a variety of loot tables and can be used by other mod developers for structure mods and other mods with loot tables as a basis. Datapack Edition
Zurtrutium Lib
Common Library for Zurtrutium Modding
Relocation
A simple building relocation plugin
RFTools Base Mod (1.21.1, 1.20.1) – Library for McJty's Mods
RFTools Base Mod is the base mod for all tech mods by McJty. This includes RFTools Dimensions, RFTools Control, RFTools Power, Deep Resonance, XNet, and so on. Features: Dimensional Shard oregen, small amount in the overworld, more in other dimensions. The machine infuser. Base crafting materials for the other tech mods. The smart wrench. Security […]
McJtyLib (1.21.1, 1.20.1) – The Foundation for High-Tech Worlds
McJtyLib is a companion mod required by all mods from McJty: RFTools, RFTools Dimensions, Deep Resonance and also by RF Lux by romelo333. Features: Acts as a required library for a large collection of mods. Allows various tech mods to function properly without crashing. Provides the necessary code for mods including RFTools, XNet, Deep Resonance, […]
RevelationaryDimensions
A simple addon to Revelationary which adds support for locking dimensions.
PaleoLib
A simple mod to provide the basis for Paleontology in Minecraft.
SDX's library
a library mod made by SDX. it's good for configs, optimization, settings and data!
Database K's Dimension
The not so dependent dependency for my other Datapack that includes a simple dark dimension with no escape made of pure black concrete.
WorldWeaver: Remastered
WorldWeaver Remastered is a powerful modern API and world generation library! As the successor to BCLib, it provides the essential framework for BetterEnd and BetterNether, fixing core terrain bugs and unlocking advanced data-driven dimensions!
BCLib: Remastered
BCLib Remastered is a powerful core library and API for Minecraft Fabric 1.21.1. It provides essential shared utilities, rendering tools, custom configs, and procedural models for BetterEnd and BetterNether. Specially optimized for modern modpacks!
Craftics - Grid Based Tactical RPG
We turned Minecraft into a full fledged tactical RPG! Gone are the days of exploring a world in first person, now you must enter new biomes and defeat enemies to gain resources all in a grid turn based RPG experience!!
Biomorphosis Mod (1.21.4, 1.21.1) – Command a Mutating Swarm to Build a Living
Biomorphosis Mod brings a living, mutating ecosystem into your world. This mod lets you control a collective mind called the Swarm. You gather biomass to build organic structures and spawn new creatures. The world changes as insect villages and new biomes appear around you. You must decide whether to fight this growing nightmare or become […]
YUNG's API (1.21.11, 1.20.1) – Explore Better Structures
YUNG's API provides shared code and tools that other mods need to work. It is a library mod that contains a collection of useful functions, especially for mods that change world generation. Features: Includes an AutoRegistration system that works with any mod loader. Offers a custom Jigsaw Manager with better performance for creating structures. Adds […]