Minecraft Java 1.21 Mods
Browse 372 free mods for Minecraft Java 1.21 — popular picks include Prism Perms, Capix!, Common Signals.
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Prism Perms
Cross‑platform permissions plugin for Bukkit, BungeeCord, and Velocity. Lightweight YAML storage, simple commands, and rich stats tools (groups/users, ungrouped/missing/list, names cache) with pagination and safe output chunking.
Capix!
A small API mod that allows Mod Developers to add capes to their mods
Common Signals
Minecraft datapack library aiming to make in common several selectors to improve optimization
Advanced API
AdvancedAPI provides very simple code, for example, ItemBuilder or SimpleInventory, which can be used to create things faster. ONLY FOR PLUGIN DEVELOPERS
OptiFoundry
Optimize chunks, entities, and ticks
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 :)
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.
Shuttle
A lightweight open-source addon library for adding extension support to your mods
Easy Freezing
A mod that allows you to Freeze Time around you at will! Try with multiplayer and things get confusing fast!
PlayerSettingChanger
PlayerSettingChanger lets you customize how online players look, sound, and appear on your client with per-player nicknames, skin URL overrides, voice mutes, and a premium themed GUI.
AbilityItemsAPI
An API to make the creation of items with abilities easier for developers
ExJoin
A plugin for creating unique join and leave messages, with the ability to configure multiple variations for each event.
Polydex2REI-Forked
Converts Polydex recipes to work with REI!
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.
Tales of the Third Age - Core
Core mod for all Tales of the Third Age Mods!
MHDF-Tools
MHDF-Tools | Dream Tools | ✨ A lightweight portable high performance Bukkit base plugin ✨MHDF-Tools | 梦之工具 | ✨一款轻量化便携高性能的Bukkit基础插件✨
Visually Optimized
A collage of vibrant cultures, seasons with the serenity mod, optimisations with sodium and libraries along with inbuilt library to search between and surf through Modrinth from inside Minecraft. Now with a little tweaks in name and other stuff.
Fix my Enchantments!
This is a light weight that Fixes one crucial feature that is in every one of Silver's Project that contains custom Enchantments
Espoir SMP
The plugin's twist is ⚙️ How the system works: 🧿 You start with 3 souls. 🔻 Each time you die, you lose a soul. 💀 At 0 souls, you become a ghost: spectator mode for 24 hours. ⚔️ Kill a player → you steal one of their souls, if you don't already have all
ISS
This Datapack adds an easy way Save and Load player inventories.
RewardsX
Turn Engagement into Rewards
ReviveSystem
Revive players after death Special items and mechanics Customizable settings Compatible with Minecraft 1.21–1.21.10 + (- 26.2)
QoL
(1.21.5+), Adds Quality of Life features that everyone needs in their Survival worlds/servers (will also include some of my other datapacks/mods in here)
Better Copper Golems
Unleash the true power of copper golems!
ProxyAnalytics
The best way to get info about your players!
WebSiteCaptcha
WebsiteCaptcha is a Minecraft server plugin designed to enhance security by requiring players to verify themselves via a web-based CAPTCHA before accessing the main game world or server.
Spawn Shield
This is a plugin that protects the user on spawn!
CraftEditor
CraftEditor allows server owners to create, edit, and manage Minecraft crafting recipes directly in-game through a simple and intuitive graphical interface, without configuration files or server restarts.
SSaVS MOD
Server Security and voting system - add custom ui (not inventory) and way to PAPER servers block ANY mods/rp in client. Support ONLY for 1.21.4
SkyeNetwork Velocity
The custom velocity plugin used to building SkyeNetwork
StringLib
A Minecraft Data Pack library that offers highly optimized implementations for many useful string manipulation utilities.
PyCraft IDE
An in-game Python IDE for Minecraft that allows scripting and interaction with the game through a Python API.
RevertRaidChanges-Normal
Restored Raid to the logic before version 1.21.
SpawnStash
This is the best and most customizable donut spawnstash plugin out in the wild
PrismaticAPI
Versatile library for advanced color manipulation and text formatting in Bukkit/Spigot/Paper plugins.