Minecraft Java 1.21 Mods
Browse 3,577 free mods for Minecraft Java 1.21 — popular picks include ExtraNPC Plugin, JEHibernate, VanillaDatapackFramework [VDF].
Updated daily
ExtraNPC Plugin
Standalone NPC Framework — GUI, Player NPCs, Shops, PlaceholderAPI
JEHibernate
Modern Java 17+ Hibernate/JPA utility library, zero-config repositories, session-scoped lazy loading
![VanillaDatapackFramework [VDF]](https://pub-2ae937f770284535a96c3330f91236aa.r2.dev/thumb/curseforge/236672.webp)
VanillaDatapackFramework [VDF]
A simple Minecraft datapack template with easy examples and tips to help you start making your own datapacks.
uxmLib
Lightweight modular toolkit for Paper 1.21+ plugins: items, GUIs, commands, config, storage and more.
PeachLib
Libary for Minecraft Paper API Plugins
Birdlibraryapi
Real JavaScript scripting for your Paper server — no compiling, no waiting for addons
vortexia-core
A lightweight, high-performance data framework decouples player profiles from traditional UUID
Frontier Armaments Mod (26.2, 1.21.1) – Blast Powerful Foes with Rugged
Frontier Armaments Mod brings a collection of frontier-themed combat gear, weapons, and tools to your world. This mod delivers twelve rugged armor sets with unique stat profiles alongside explosive ranged firearms. It also equips you with dual-purpose forge hammers, providing standalone gear without needing extra magic library mods. Features: Adds 12 distinct frontier-style armor sets […]
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 […]
WorldWeaver Neoforge Mod (26.2, 1.21.1) – Ports WorldWeaver To NeoForge
WorldWeaver Neoforge Mod brings the WorldWeaver library to the NeoForge loader. It helps other world creation mods run on newer game versions. The mod also fixes several bugs so biomes load in the right places. Features: Brings the WorldWeaver library to the NeoForge platform. Fixes TerraBlender biomes to spawn at the correct size. Stops custom […]
Duplicationless Mod (1.21.11, 1.20.1) – Core Background Files Required
Duplicationless Mod adds a background framework for other Minecraft projects to run properly. It handles common background tasks like reading settings files and saving block data. You only need to put this file in your mods folder if another mod asks for it. Features: Works as a required background file for certain mods to load […]
Gun Core Mod (26.2, 1.21.11) – Library Mod To Add Guns
Gun Core Mod is a library datapack/mod that makes it easy for developers to add their own guns into the game. The mod by itself does not add any new content to the game, but it facilitates an environment that makes it easy for developers to add custom guns to the game. As a player, […]
WalksyLib Mod (26.2, 1.21.1) – Developer Config Utility
WalksyLib Modprovides a builder-based system for creating and managing mod configuration options in a structured and flexible way. The library focuses on clear serialization and deserialization of config data while supporting both standard and advanced option types. Features: Builder-based configuration system for mod developers. Serialization and deserialization of configuration data. Standard option types including boolean, […]
Hypixel Mod API Mod (26.2, 1.21.1) – Hypixel Server Data API
Hypixel Mod API Mod is a dependency mod that enables other Minecraft mods to interact with the Hypixel server. Features: Enables communication between client mods and the Hypixel server. Required by many SkyBlock/QoL mods. Supports multiple mod loaders and Minecraft versions. Hypixel Mod API Mod Download Links
Melody Mod (26.2, 1.21.1) – Hear New Music in Your Game
Melody Mod gives other mods a way to play background music using OpenAL. This system works separately from Minecraft's own sound engine, allowing for more control over audio. This is a library mod, so it does nothing by itself and is only needed if another mod requires it. Features: Lets other mods load audio files […]
Player Animation Library Mod (26.2, 1.21.1) – Dev Framework For Player Animations
Player Animation Library Mod is a developer-focused framework for animating the player model in a way that avoids conflicts with other mods. It provides importers, runtime control, and hooks for effects and particles, but adds no gameplay on its own. Features: Loads animations from Blender and Blockbench JSON (GeckoLib and Bedrock formats). Supports MoLang expressions […]
Packet Events Mod (26.2, 1.21.1) – Packet Processing and Manipulation
Packet Events Mod is a powerful networking library for Minecraft packet processing and manipulation. Features: Lightweight library for handling Minecraft network packets. Screenshots: Packet Events Mod Download Links
Polymer Patch For Extended Drawers Mod (26.2, 1.21.1) – Makes Extended Drawers Work Fully Server-Side
Polymer is a library mod that assists with server side content. It helps players enjoy modded content server-side without having to install mods on the client side. Polymer Patch For Extended Drawers Mod basically allows servers to run the Extended Drawers mod on the server side, so that players can enjoy it without having to […]
Mod Menu Badges Lib Mod (26.2, 1.21.11) – Create and Add Custom Badges
Mod Menu Badges Lib Mod is a straightforward library designed to enhance your Minecraft experience. With this mod, you can easily create and add custom badges to your ModMenu. Features: Custom Badges: Create your own badges using easy-to-use tools from the library. The Mod Menu Badges Lib works with ModMenu. Screenshots: Mod Menu Badges Lib […]
PlayerAnimator 9minecraft Mod (26.2, 1.21.11) – Unlock Smooth Custom Player Animations
PlayerAnimator 9minecraft Mod powers custom movements and emotes for your Minecraft character. It acts as a shared framework so other mods can change how you pose, fight, or dance. The mod processes animation files and runs them side-by-side without breaking. Features: Plays Custom Animations: It reads animation files made in Blockbench or Blender to move […]
GabrieleCore Mod (26.2, 1.21.1) – Library for Gabriele_333's Mods
GabrieleCore Mod is a library and utility mod that provides essential systems and features used across Gabriele_333's mods. It introduces a modular network system, helper classes, and general-purpose utilities that simplify mod development and enable powerful interactions between blocks and items. It does not add new content on its own but is essential for enabling […]
Dark Loading Screen Mod (26.2, 1.21.11) – Make The Loading Screen Darker
Dark Loading Screen Mod is a mod to make the loading screen darker. Colors can be modified in-game if both Mod Menu and Cloth Config API are installed. Manual configuration: Create or edit .minecraft/config/dark-loading-screen.json, manual changes are only visible after restarting the game. Screenshots: Dark Loading Screen Mod Download Links
Simple Registry Aliases Mod (26.2, 1.21.11) – Define Registry Entry Aliases
Simple Registry Aliases Mod allows you to define registry entry aliases, by exposing Fabric API's registry alias system in a simple, config-driven way. It supports both static (blocks, items, etc.) and dynamic (biomes, enchantments, etc.) registries. Features: Allows you to define registry entry aliases. Exposes Fabric API's registry alias system in a simple, config-driven way. […]
StrawberryLib Mod (26.2, 1.21.11) – Library for MoriyaShiine's Mods
StrawberryLib Mod is a silly common code library for MoriyaShiine's Mods. Screenshots: Supporter options: In the bottom left box, options for supporters exist StrawberryLib Mod Download Links
Zine Mod (26.2, 1.21.11) – Library For EightSidedSquare Mods
Zine Mod is a newly developed library mod by the popular Youtuber and mod creator named EightSidedSquare. This library is used by many of the mods developed by this creator. The mod by itself does not add any new content into the game. As a library mod, you only have to install it if it […]
Sable Mod (1.21.1) – Build Moving Block Structures with Realistic Physics
Sable Mod brings moving block structures called sub-levels to Minecraft. It lets blocks, chests, and other items group together into parts that move with real physics. These moving sections react to the world around them while you can still interact with them. The mod acts as a background library and does not add new items […]
oumlib
A tested and human-coded library for minecraft paper/folia and velocity plugin development with an example plugin.
Chem Lib (1.21.1, 1.20.1) – Library for al132's Mods
Chem Lib is a simple mod that adds plenty of chemistry-related items including: All 118 elements, Ingots for all elements that make sense (i.e. all except for gases, mercury, iron, gold, etc), Several dozen chemical compounds, including several "drugs" that have potion effects when consumed. Screenshots: Chem Lib Download Links
AlchemyLib Mod (1.21.1, 1.20.1) – A Foundation for Alchemy
AlchemyLib Mod is a library mod for sharing code between ChemLib addon mods such as Alchemistry and Techemistry. Previously named A lib. Features: Acts as a shared library for other mods to use. Allows mods like Alchemistry and Techemistry to share code. Provides common code for machines and screens, ensuring compatibility. AlchemyLib Mod Download Links
Tesseract API Mod (26.1.2, 1.21.1) – Registering Blocks, Items, and Fluids
Tesseract API Mod provides a hook framework and API, specifically for developing addons for Modern Industrialization. It also includes convenient helpers for registering blocks, items, and fluids, as well as offering some extra events to enhance the development experience. With Tesseract, developers can streamline their modding process and focus on building amazing new features. Features: […]
Confetti Lib Mod (26.1.2, 1.21.1) – Library For Adding Confetti Particles
Confetti Lib Mod is a library mod that adds confetti particles into the game. Other mods that introduce items that shoot out confetti particles can utilize this mod for the entirety of the particle effects. Using the /particle or /extended_particle command, you can generate confetti particles. This mod is required as a dependency by other […]
OneConfig Bootstrap Mod (26.1.2, 1.21.1) – Library for OneConfig’s Mods
OneConfig Bootstrap Mod is an empty install for the next-generation config library for Minecraft. Screenshots: OneConfig Bootstrap Mod Download Links
Omega Config Mod (1.21.11, 1.20.1) – Ultimate Configuration Library
Omega Config Mod is a hyper-minimal config library based on Auto Config. It's designed to be simple and intuitive for both developers and players. Features: Be lightweight (<25 KB) for JIJ usage Exceedingly simple design & API for developers Intuition and usability for players Bonus annotations for advanced config options (syncing values) Configs: The following […]
Advanced Wall Climber API Mod (1.21.11, 1.20.1) – Powerful Library for Wall Climbing
Advanced Wall Climber API Mod (AWCAPI) is a utility API designed for Minecraft mods that want to add advanced wall-climbing behavior to entities. It allows mobs to move on walls and other surfaces in a natural way, similar to how spiders climb. Features: 3D Surface Movement Entities can move on walls, ceilings, and other vertical […]
Luminance Mod (1.21.11, 1.21.1) – Library Mod
Luminance Mod is a library mod that can be utilized by developers to configure how the contents of their mod work with shaders. As a library mod, the mod by itself does not add anything new into the game, but it may be required to install this mod if any other mod needs it as […]
Library Ferret Mod (1.21.11, 1.20.1) – Library for Jtorleon's Mods
Library Ferret Mod is a library mod, contains shared code for Jtorleon's Mods. This mod doesn't do anything but give useful code for Jtorleon's Mods. Library Ferret Mod Download Links