Minecraft Java 1.21 Mods
Browse 133 free mods for Minecraft Java 1.21 — popular picks include Structure Gel API, YUNG's API, Lithostitched.
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Structure Gel API
An API for simplifying the developer end of creating generated structures.
YUNG's API
Library mod for YUNG's mods.
Lithostitched
Library mod with new configurability and compatibility enhancements for worldgen
Oh The Trees You'll Grow
Tree library used by popular mods such as Oh The Biomes You'll Go.
Duplicationless
A lightweight Minecraft library that simplifies JSON configs, block data storage, and entity tracking across chunks and dimensions.
Structures Tweaker
StructuresTweaker gives you complete control over how players interact with structures in your world.
DungeonZ
Base mod to add new dungeons with one default dungeon
Datapack Portals
Create custom portals using CustomPortalApi with datapacks
Multiverse-Core
The Bukkit World Management Plugin.
WorldWeaver: New Dawn
An unofficially maintained continuation of the BetterX Team's utility library for Fabric and NeoForge, designed to streamline common modding tasks, especially those related to world generation
Sky Aesthetics
Change the minecraft skybox as you wish!
LagFixer
⚡️ Best Performance Solution! 🗄️Trusted by 3000+ servers! ✅ Lightweight and highly Asynchronous!
Dimension Leak Fix
Fixes memory leaks when switching dimensions. Mods like Collective, AmbientSounds and Create retain old worlds in RAM - this mod cleans them up automatically, recovering 2-4 GB per transition.
Infiniverse
API for creating dynamic dimensions
More Density Functions
Utility mod to add more density functions for world generation datapacks.
Simple Lucky Block
Adds a Lucky Block to Minecraft with random lucky or unlucky drops.
Ars Monde Lib
Content library for Ars Monde
Structurized Reborn
Simple library that helps with the addition of custom village structures
DimLib
Provides dynamic dimensions functionality.
Piglin Conservatory v3.0
Adds a news structure to the Nether, The Piglin Conservatory, along with a new Obsidian Apple, Dragon Fruit, Toxic Mushrooms, Hoglins' Fossils, Corrupted Emerald and a New Music Discs!
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
XD's Library
XDPXI's library for numerous tasks.
Server Sided Portals
Create custom portals and dimensions compatible with any client!
Uniful
Unify Materials together!
Generator Accelerator
Optimizes the Minecraft worldgen and chunk management by introducing better calculations.
Easier World Creator (ewc)
library mod mostly designed for world-gen
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.
World Loading Tweaker
Allows you to change the spawn chunk radius of Minecraft, either speeding up loading or improving spawn quality
Mining Dimension
Mining Dimension gives you a brand-new realm overflowing with resources. Every vanilla ore spawns at significantly higher rates, and - thanks to full Create integration - you’ll also uncover Zinc.
CAWEZ'S Mantle to Stratus
A vertical expansion to Minecraft adding 3 new dimensions both above and below the Overworld, with many sights to see and challenges to overcome.
Modified Biome Source
Add modified biome sources that can be configured.
Keystone Expansion Pufferfish's Skills
MMO-style skill tree expansion for Puffish Skills, adding new progression categories like Combat, Mining, Exploration, Farming, Crafting, Building, Magic and Taming.
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
Health Enchantment
New enchantment that, when applied to armor, lets you get more health.
goPaintAdvanced
The ultimate painting tool for Minecraft
Deltapack
A deltarune datapack adding content from dark fountains and dark worlds to the roaring knight. As well as items and spells like snowgrave and the shadow mantle.