Fabric Mods for Minecraft 1.21
Browse 1,482 free Fabric mods for Minecraft 1.21 — popular picks include Butterfly API, ChosenLib, Flyd.
Updated daily
Butterfly API
An API to simplify Math and Registries.
ChosenLib
ChosenLib: a lightweight utility library for Fabric

Flyd
Dynamically generate fluids. Ideal for modpack creators.
Big Items API
A really simple library that allows developers to make items take up more inventory slots.
LDLib-Fabric
LDLib is a libarary mod for custom rendering, modular gui, but now in Fabric.
VillagerExplorer
Villager Explorer is a client-side Minecraft mod that lets you view detailed information about villagers in a beautiful, interactive GUI.
Fruitbridge
This mod contains Fruitbridging utilities to assist players. Features are designed for both the Distance and Java 12b leaderboards.
Merged Items
Adds a merging mechanic for items. Items can 'store' other items and will inherit their attribute modifiers.
OriginsxTrinkets
This mod allows player to create their own custom trinket items using the origins mod
relauncher
JVM relaunch library for Java based applications
Biome Modifier for Fabric
A library mod that allows users utilize datapacks to modify biomes easily and compatibly.
Teleport Mod
Force Teleport Players: Cannot teleport others to you or third parties coordinates/players Permission Tiers: No external permission plugin dependency (all players enabled by default)
ConditionMod
Create powerful Minecraft events using YAML. No coding required. Optimized alternative with ConditionalEvents compatibility.
Static Data
Access mod integration data right away from your own mod initializer!
InfoPlus+ 📑
Displays detailed server system info (CPU, RAM, GPU, OS, Java, Minecraft, Loader) directly in-game. Useful for debugging, tech support, and verifying server/client environments
midi
A lightweight Minecraft mod for sending MIDI-like actions from the client to the server via custom plugin messages.
Fabric Database H2
Fabric database module for H2.
Every API
As you read the name this modpack adds all the API's that are present in the Minecraft API library. You can now download any mod without worrying about the API's that you will need to find manually, just download this modpack and you're all set.
κoωo (kowo-lib)
Fancy™ kotlin syntax for oωo-lib
Netty Memory Tweaker
Adds a netty allocation options to the settings menu.
CustomCapes
# Custom Capes Ever wanted a cape that's truly your own? With **Custom Capes**, you can design, edit, animate, and wear completely custom capes directly inside Minecraft. No external editors, no complicated setup—just install the mod alongside Fabric API
Lag Detective
Lag Detective is a lightweight diagnostics mod that helps answer where the lag is coming from.
SGL (Super GUI Lib)
Super GUI Lib - A library for creating beautiful GUIs without assets.
Unnamed Common Library (UCL)
A very simple, easy to use configuration library that fits right in your mod!
DinoCore
A library mod to organize and run my collection of realistic high-end minecraft dinosaur mods
netlib
Kotlinx Serialization for custom payloads.
VoiceLib
Minecraft Voice Recognition Library
Itematic
A mod that adds data-driven items to the game, and much more!
SnAssets Library - Particles
A library containing particles & particle textures for my & other peoples mods.
LibZ Rework
This mod is a rework for Minecraft version 1.21.11 by LibZ (a library mod for some Globox_Z mods and for Player Level Skills).
Carpetlogging
Allows almost every non solid block to be covered with carpets in a dynamic way !
TweakerooFeaturesMenu
This mod adds a new and more convenient function switch interface to the Tweakeroo mod.
fStats [Archived]
Fabric metric system for developers
Cauldron API
this mod is an api that allows mod creators to create multiple type of recipe that base on cauldron!
Fabric Utility
Fabric Utility is a mod with chunk and subchunk tagging, protected area support, player nicknames, configurable entity petting, and a Ban Hammer item NBT feature.

Player Persistence
!API MOD! Additional Code required A simple library that allows to sync player data such as inventories, ender chests and locations between multiple servers