Minecraft Java 1.21 Mods
Browse 423 free mods for Minecraft Java 1.21 — popular picks include Slimefun United, Command block in item tab, XGamemode.
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Slimefun United
A modern and organised continuation of Slimefun’s legacy. Slimefun United transforms your server into a modpack-like experience with backpacks, jetpacks, reactors, electricity, automation and countless new systems.
Command block in item tab
This mod adds hidden items to a new item tab.
XGamemode
You're not switching modes, you're switching dimensions.
Hopper Plus
Hopper Plus adds multiple tiers of hoppers with unique abilities to Minecraft! From filtering items to teleporting them across distances, these upgraded hoppers will revolutionise your automation setups.

Hopplet (Hopper Filters)
Expressive hopper filtering, written as plain text. The most powerful plugin in this domain. Filter by any item property. Extendable via a strong developer API.

More Search Bars
Add more search bars to various UI screens
PySpigot
A Python scripting engine (plugin) for Minecraft servers running Bukkit or one of its forks (Spigot, Paper, etc.).
AntiSeedCracker
Protekts your server’s real seed by providing fake seeds to clients and blocking seed-discovery commands. Fully optimized for Folia.
FNAF Dreams and Nightmares (Work Game)
Mod will recreate the creepy atmosphere of FNaF 4
Networks Terminals
A central ME-like UI to access all items in your storage system easily
Profitable
Dynamic economy with real supply and demand by using an exchange system!
OpenJavascript
Create custom menus, commands, plugins, systems, basically anything with scripts in Javascript! With multithreading and Folia support! Everything is fully documented in the documentation!
Create: Simple storage recipes
Recipes for Tom's Simple Storage to match and use the Create mod.
RankPlugin
RankPlugin shows player ranks as PNG icons from a resource pack in both chat and the tab list, with easy configuration via ranks.yml, commands, and GUI.
Magnets by Juix
Datapack adding magnets that attract items around you
Draventh Ores
⚒ Advanced Tier Ores & Equipment This mod expands Minecraft’s survival progression by introducing 15 new late-game materials, each with full armor and tool sets. The goal of this mod is simple: Extend progression beyond Diamond and Netherite with a struc
Faster Hoppers
A lightweight Paper/Spigot plugin that makes hoppers transfer items faster. Works on Minecraft 1.21.x+
Block Info
Hover your crosshair over certain blocks to show their block information!
Core Utilities
A futuristic tech-meets-automation mod for Minecraft, designed to expand the game’s core functionality with high-efficiency tools, modular machines, and directional logic systems.
Creatures Dominion
This is a mod that will have a lot of animals and even extinct ones. It is not released yet and neither finished. Please give suggestions and report bugs to me please! I hope you enjoy the mod!
Easymenu
A lightweight GUI menu plugin for Paper and Spigot servers. Create menus easily with YAML configuration.
NoNether Plugin
Prevent players from entering the Nether.
RankedSMPX
A highly configurable Feature Rich Ranked SMP plugin. Inspired by RankedSMP.
Uncraftable Trims & Sherds
Adds ability to uncraft armor trims and sherds to the useful resources!
More Villages Datapack
Adds more villages to the game.
Magnetism
Datapack adding a magnet that automatically pulls nearby dropped items toward the player.
Media HUD
Media HUD is a client-side Fabric mod that adds a draggable media player HUD to Minecraft Java Edition. It supports local audio and video playback from disk, library browsing, saved HUD position, full and compact layouts and multiple visualization modes.
Modset Policy Enforcement (MPE)
This mod has a new concept of Anti Cheat for Minecraft. Instead of looking if the User does move right it sits on the users PC and looks what mods he has installed. With that the user cant even join with mods that have been baned by the Server.
Bloodline Smp
Bloodline SMP Client Mod adds the custom Bloodline HUD, ability icons, cooldown overlays, and rebindable keybinds used by the Bloodline SMP server. It also syncs bloodline state and powers the client-side visuals required for the full gameplay experience.
Kappa's AntiCheat
A lightweight Fabric anti-cheat designed for high performance on large-scale servers.
Mekanism Elementified
Expands Mekanism with 25+ chemical elements and compounds, specialized processing machines, and advanced industrial tools for complex chemical production chains.
Create: Duxo's More Renewables
Adds some more renewables to Create Mod
Sepd_Kits
A Better Kits Plugin For Your Server
CodeBots
CodeBots is a Minecraft plugin that allows you to create and program bots inspired by ComputerCraft's turtles.
Better Homes
A simple and safe multi-home plugin with LuckPerms rank limits and teleport safety checks.
mcs_permissions
Server Essentials, but for vanilla minecraft made in datapack format.