Minecraft Java 1.21 Mods
Browse 1,937 free mods for Minecraft Java 1.21 — popular picks include TemporaryCastration, Toms3Core, Minirounds' Data Pack.
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TemporaryCastration
Limit lags caused by massive farms !
Toms3Core
Core with utilities and patches for anarchy servers
Minirounds' Data Pack
This project adds an easy way to start Life Series or Event Minirounds!
Modern Discord Bridge/Portal
PortalCord is a next-generation Discord bridge plugin designed specifically for Paper 1.18 - 1.21 servers.
Simply Horse Roads
It's a simple and optimized plugin that boost the horse speed on certain road-blocks with the opition to add player boost aswell.
Armor Rebalancer
TradeReplacer is a simple Minecraft Paper plugin for 1.21.4/5 that changes how armor progression works by modifying villager trades and crafting.

Blaze and caves scoring
Adds a scoring system for blaze and caves advancement pack
Squint
Client-side mod for Minecraft 1.21.1 (NeoForge & Fabric). Replace vanilla render cutoffs with per-category distances, optional ultra-far draw, and limits you control.
Chunk Ticker
Keeps selected chunks permanently loaded and fully ticking
HyskBlockUpdateInhibition
blocking neighbor updates caused by block replacements.
NoLootOnDrop
NoLootOnDrop is a simple but effective plugin that prevents item drops from explosions and automatically despawns player-dropped or block break drops after 10 seconds. Great for reducing lag, preventing loot abuse, and keeping your world clean during PvP,
Itemstacking
Stop item lag on your survival server! Stacks blocks and items beyond the standard 64 limit on the ground with customizable visual tags, smart hopper support, and automatic water-flow merging.
InstantSimCleanup
InstantSimCleanup is a forced server optimization plugin that reduces lag by aggressively clearing inactive zones. Instead of relying on a standard timer, it uses a chunk distance control mechanic to remove everything in areas where there are no players.
Lag Squared
Prevents various lag machines without messing up game mechanics
Battlepass Reloaded
A feature-rich Minecraft BattlePass plugin for Paper servers with quests, XP leveling, seasonal progression, and customizable free and premium reward tracks.
Chest Door Lock
Lock is a lightweight and multiplayer-friendly Minecraft datapack that allows you to easily secure your items and structures.
Create: Crushed Concrete
Allows the ability to crush all vanilla concrete into concrete powder for the off chance you accidentally turn one too many into concrete. From Dense to dust jiffy quick!
TimSpik Basics
Modpack that enhances the Vanilla graphical experience without altering the core mechanics.
WorldPlaceholder
Outputs information about the player's location in the dimension using Placeholder.
Configurable Cobblestone Generator
Configure lava-water cobble generators with weighted block outputs, vanilla defaults, and optional Create drill support for NeoForge 1.21.1.
Lemony's Survival modpack
This is the Lemony Minecraft server modpack, adding performance, visuals, and new mechanics. It can also be used outside the server.

Copper Handles
Adds copper handles that make your tools stronger and faster to repair!
Autosmelt_dp
Automatic smelting of all available ores
ServerTasks
A plugin for Paper 1.21 that automates tasks like restarts, broadcasts, and custom commands with timeline notifications.
CraftingStick
A simple plugin which adds a crafting table on a stick

wHit - PvP Combo System
Lightweight & Satisfying PvP Combo System

LibrarianEnchantmentLimiter
This plugin replaces librarian enchanted book trades with level 1 books that cost a random amount of a configurable item plus 1 book.
Final Destination HUD
It adds a kill tracker for final destination armor in hypixel skyblock, visible on the HUD
CorePerformanceFix x SortSmart
A high-performance optimization plugin focusing on entity-ticking efficiency and automated item-stacking and you can use SortSmart
Kaidon Essentials
A structured essentials plugin built for performance. Core systems with Vault and PlaceholderAPI dependencies, focused on flexibility and integration.
Minecraft unOfficial Recipe Experiments
Minecraft's unOfficial experimental extra recipes data pack.
Ananke WorldControl
The ultimate, lightweight tool for granular control over Minecraft physics, player stats, mob griefing, and crafting. Block anything, anywhere.
Jester AntiCheat
Ultimate protection against modern exploits. Jester blocks cheaters instantly while maintaining flawless server performance.
Cobalt Age
An expanded redstone, up to 60 power lenght, waterloggable, optimized, with vertical relays, incompatible with redstone, and blue! It comes with minerals and block sets.
PolyGuard
The Next Generation of Protection is Here! PolyGuard is a high-performance, premium protection plugin!
Create: Kinetic Horizons
Create: Kinetic Horizons Create: Kinetic Horizons is a high-performance 1.21.1 NeoForge modpack dedicated to the art of mechanical engineering. It strips away the "magic" of traditional tech mods and replaces it with visible, rotating machinery.