Minecraft Java 1.21 Mods
Browse 3,590 free mods for Minecraft Java 1.21 — popular picks include Cobblemon: Hatrix Edits, Simple Client Base, Extra Entity Attributes.
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Cobblemon: Hatrix Edits
A collection of cobblemon edits + breeding alternative
Simple Client Base
This library mod added a module management system for Minecraft.
Extra Entity Attributes
This mod adds new attributes, which serve as an API for other mods.
Pranks A Lot
Pranks A Lot Is A Mod Where You Can Prank Your Friends With The Ultimate Trolls And Traps.
Capix!
A small API mod that allows Mod Developers to add capes to their mods
Advanced API
AdvancedAPI provides very simple code, for example, ItemBuilder or SimpleInventory, which can be used to create things faster. ONLY FOR PLUGIN DEVELOPERS
AnimVanish
Plugin that provides large library of pre-made effects to your vanish
Common Signals
Minecraft datapack library aiming to make in common several selectors to improve optimization
OptiFoundry
Optimize chunks, entities, and ticks
HeartDev
API that allows developers to easly access the health bar rendering system
Get UUID
Simple UUID conversion library
Inventory Visual Enhancer
Inventory Visual Enhancer is a client-side mod that improves Minecraft inventories with rarity glows, stack rings, and animated icons, making item management clear, stylish, and lightweight.
ultimate enchant
this mod removes the enchant limits in anvil and /enchant command
Taglib
A Minecraft tags library
The Flattening
Simple vanilla-client-friendly mod to add anvil-flattening recipes via datapack.
better mob : jungle expansion
Better Mob: Jungle Expansion transforms Minecraft jungles with animated creatures, dangerous predators, immersive wildlife, GeckoLib animations, tropical atmosphere, rare mobs, jungle structures, and realistic exploration adventures.
LoadEmUp
Advanced plugin reloader for Spigot — smart, safe, and production-ready.
Sword Storm
The Sword Storm Enchantment for Minecraft 1.21 Fabric Mod adds wind-element abilities to all types of swords (Diamond Sword, Netherite Sword, etc.) with levels ranging from I to V. In Survival Mode, it can be obtained via Enchanting Table (consuming 50% mo
BetterSettings
The ultimate API-first player settings framework with 50+ built-in toggles, full Folia support, and a unified GUI.
F.Essentials
F.Essentials is a feature-rich mod for Fabric that brings essential server commands and utilities to Minecraft. Designed to make server management and player interaction easier.
SkRedis
SkRedis is a Skript addon that allows you to interact with pubsub and to store data in your Redis database.
PVPUtils-fix
Fix the Linux platform support issue for the PVPUtils Mod
CoffeeProxy
This mod allows joining Minecraft servers via a SOCKS/HTTPS proxy (Fabric)
Mascom (Mass Commands)
Run any command as often as you like AT ONCE and easier than ever before :)
farrow
ArrowKt for Fabric (& Quilt)
Visual HUD
A clean, fully customizable client-side HUD overlay for Minecraft 1.21.11 Fabric — shows coordinates, FPS, biome, time, direction, light level, speed, day count, dimension, compass, and FPS sparkline with an in-game config screen.
Classic Splashes
Relive the nostalgia! This pack restores every yellow splash text from the Legacy Console Edition, bringing that classic console charm to Java.
MetaCustomItemsLib
A library for BagOfGold and MobHunting | Rebuilt for 1.21!
Particle Packs
Add your own custom particles with a resource pack.

HotbarAPI Compatibility
Compatibility patches between HotbarAPI and other mods
GK1H Tags
Library with many tag-related changes made by GK1H.
One Block Random Challenges
This Plugin Gives You Many Exciting Random Challenges Specially Made For ONE BLOCK However This Also Works On Normal World Just Install it And Enjoy I've also made a Separate Survival Challenges Plugin Check out my profile to find That Thanx for download
Seamless Glowing Ores
Glowing ores with an optional connected outline. Ore of the same type joins into one shape across every stone it generates in. One dependency, every loader: no OptiFine, no Continuity, no Sinytra Connector.
ActiveEnchantmentsLib
A small lib that allows your enchantments to apply in the player's inventory and provides few utilities

Slashbridge
serverside utility mod aiming to add in minecraft commands that I think the base game lacks, bridging datapack and mod function.
No Ghost Blocks
A lightweight Minecraft Fabric client-side mod that fixes ghost blocks caused by client-server desync. It detects when block states don’t match the server and automatically re-syncs them to remove fake broken or invisible blocks.