Minecraft Java 1.21 Mods
Browse 775 free mods for Minecraft Java 1.21 — popular picks include InstaKeystrokes, Silver's Ray Cast Library | RCL, Creator Tools.
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InstaKeystrokes
A clean and customizable keystrokes HUD mod for Fabric 1.21.4 with draggable UI, color customization, and a modern design.
Silver's Ray Cast Library | RCL
Yet another Ray Cast library! with even more functions?
Creator Tools
Add creative camera controls, walk mode and weather toggles for cinematic gameplay and creative recording.
v0idChat
The ultimate chat formatting and filtering plugin. Customizable & Folia & Fast & LightWeight

Planet - Border teleport
Border-teleport mod: teleports entities crossing world borders (±326) to opposite side. Perfect for 1:326 Earth maps. Open-source (remix allowed, but must keep code open).
CarLib
A modular Minecraft library built for vehicles, gameplay systems, and scalable custom development.
No Lan Button
Removes the "Open to Lan" button on the in-game menu
Crafters Book Actions
Take control of written books. Adds dates and signatures. Great for contracts and roleplay!

hShop
A very customisable and weirdly easy to use Shop plugin.
AggStack
AggStack allows you to store multiple items with the same ID but different NBT data (durability, enchantments, etc.) in a single inventory slot, with an expandable panel to view and manage all sub-items.
VirtualFilter
Professional Independent Virtual Filtering System
PlayerMapX
You can see your own server maps and players and their inventory, Rebranded from SNKAWatchMap
ghosty
An Anti-EntityESP mod for fabric.
Aura Effects
A lot of cool aura particle effects to make you look cool!
CrossTPA
CrossTPA is a high-performance, cross-platform teleportation suite that seamlessly bridges the gap between Java and Bedrock players with interactive GUIs and robust economy integration.
Simply Better Core
Simply Better Suite is a complete collection of Minecraft Fabric 1.21.1 mods inspired by the legendary EssentialsX plugin. This is simply better core. Required for all SBS mods to work.
Sanityfy
Adds Sanity to Minecraft for you to use
SkVoid
SkVoid is a lightweight Skript addon focused on advanced session management. It allows developers to easily track, manage, and reward player activity through real-time session data and custom playtime statistics.
FXItems
WARNING: Coding Involved | Framework for adding custom Items, Events, Commands and Foods
FPSWizard
A simple setup wizard that guides players through Minecraft settings that can improve FPS and performance.
BasedUtils
A advanced toolset of easy-to-use implementations for every plugin developer
Soul Fragments
PVP based plugin for smps based on buffing armor with different abilities using soulfragments dropped when killing players
MOTD Studio
Add better customizable MOTD for better looking & nicer SMP
mannequin controlls
mannequin controlls allows you to move/pose mannequin easily and can be used as a mini library for a variety fo projects.
twinkle popo mod
it adds twinkle popo realistic pikachu and realistic hellokity
Modmc
A highly optimized, zero-dependency, and incredibly accurate anti-cheat built natively on PacketEvents. Catch modern hackers instantly across versions 1.8 to 1.21.3 without punishing legitimate players.

AriKeys Continued
Fork of AriKeys for moden versions. AriKeys is a client-side mod for Minecraft, which allows your client to receive and send keypresses between servers using the AriKeys plugin.
Gate Pass
Add UI login system to your minecraft server and anti-bypass login system.
Walking Spawns Random Blocks
Every step you take spawns a completely random block under your feet. Survive the chaos and build with whatever the game gives you.
Tooltip+
The Ultimate Tooltip Mod
GlyphCraft
GlyphCraft is a client-side text editor for Minecraft that makes creating beautiful books, signs, and chat messages easy. It features a rich Unicode symbol palette, powerful formatting tools, and one-click border alignment.
ScavengeItem
This plugin is a Scavenge Hunt plugin, that's library is easily customizable, the controls are easy, and the fun is max!
DeathCode
A death compensation system with Discord integration. Players receive unique codes when they die and can request their inventory back through Discord with video proof.
AquaLib
AquaLib is the foundational core library engineered to power the Aqua Kingdoms ecosystem and its suite of advanced oceanic features. It provides a high-performance framework for handling complex data and immersive underwater mechanics while ensuring best

Real Temp
A realistic client-side temperature survival mod with dynamic biomes, weather, altitude, armor insulation, and seasons. Survive freezing winters, scorching summers, and extreme climates with immersive environmental mechanics.
LightChatWelcomer
Simple spigot plugin to display custom join messages