Minecraft Java 1.21 Mods
Browse 157 free mods for Minecraft Java 1.21 — popular picks include Just Utilities, More Density Functions, Semos Animations Lib.
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Just Utilities
A personal use Multiloader Library
More Density Functions
Utility mod to add more density functions for world generation datapacks.
Semos Animations Lib
Entity animations library pack for ressources packs.
Ethecore
Adds an animation and model system, as well as other utilities.
JourneyMap Waypoint Syncing (JMWS)
This mod allows you to save waypoints on JourneyMap between multiple devices via the player/account UUID on the server
Creative Menu Tweaks
A mod that improves the creative gui, adding animations, sounds, and data driven item groups.
Sculk Dragon Utils
A utility mod that adds a number of potion effects (and eventually a command) related to Sculk.
Reliable Recipe Viewer (RRV)
A recipe viewer for the latest versions of Minecraft, rebuilt from EIV and designed to be configured.
IFramesTweaker
Tweaks How Invincibility Frames are handled to make fast weapons function properly.
Cobblemon Realms Core
A lightweight Cobblemon utility mod providing quality of life features and shared systems, designed for Cobblemon Realms but fully compatible with any modpack.
Matthiesen Lib API
The Server-side API for Matthiesen Lib, providing utilities and features for mod developers using the library
Spell Engine Extension (RPG Series Tweaks)
Extends the mod 'Spell Engine' with additional functionality.
Mango's MultiBlock Library Revived
Provides some useful utilities for making Multiblock Structures
Scalar Core
Scalar Core is a library mod for Minecraft that provides a variety of utilities and tools for modders.
Alexandria Lib
Alexandria is a lightweight Minecraft library mod that provides shared utilities and a common foundation for other mods. It doesn’t add gameplay on its own but serves as a core dependency to make mods easier to build and maintain.
Moonlight Core
Moonlight Core is a layer abstraction of Minecraft mod loaders that is aimed to help with multi-loader mod development giving developers utilities for their mods.
Music and Melody
Comprehensive music overhaul powered by Albums, Playlists and Events, alongside a fitting soundtrack expansion and various music tweaks
Eva's Scroll Tweaks
Keybindable scrolling, keybinds to mimic scrolling, and horizontal scrolling compatibility!
Russian-language Tweakeroo
Translates the Tweakeroo mod into Russian
Mob AI Commands
A standalone version of the commands added by Mob AI Tweaks mod
CobbleTypes Master
The Ultimate Pokemon Type Utilities in minecraft and cobblemon! Type Chart, Team analysis, Scanning and much more!
fweigel-util-lib
Shared client-side utility library for my Fabric mods. Provides common rendering, storage, UI, and sound utilities.
Mixin Helper
Utility mod for modpack developers that provides complete control over mixin behavior
Café Core
Core library mod by Café Leblanć. Provides shared systems and utilities used by other mods from the same studio. Not standalone — required only as a dependency.
TidyInv
Smart, fast, server-friendly inventory sorting with 7 modes, vertical sort, locked slots, profiles, chest presets, deposit/restock/dump/take buttons, in-game config GUI, and a public API. Works in your inventory and in any chest, barrel or shulker.
Inv Tweaker
Inventory sorting and grouping mod, also has auto fill for the hotbar
Emissive Library
Uses core shaders to allow emissive texture support for blocks, items, armor, and more! This is a library for other resourcepack creators to use.
TLA Api
An abstraction layer over recipe viewer apis for minecraft.
Clutch
In some cases a clutch will be impossible. This mod shows whether a clutch is doable and how difficult it will be, alongside many other clutching utilities.
Psi Tweaks
Overpowered patches to Psi.
OnlyWaypoints
A Minecraft Fabric Mod that adds bloat-free Waypoints with a Vanilla feel to the game
Dark Client
Ever wanted all the perks of a premium client without juggling another launcher? With Custom Client, you get client-side features baked straight into your mods—performance boosts, HUD mods, and quality-of-life tweaks—loaded right alongside Fabric API
MariesLib
MariesLib is a shared NeoForge 1.21.1 library powering Marie’s mods. It provides runtime item classification, mod compatibility discovery, registry infrastructure, and developer utilities
Brigadier Extras
Brigadier Extras provides many utilities for using Brigadier.
Lazr's Lib Ported
A ported library containing utilities for ported Lazr's Mods.
Biomeless Music
Removes the biome dependency of most overworld and nether music.