Minecraft Java 1.21 Mods
Browse 3,935 free mods for Minecraft Java 1.21 — popular picks include Compressed Chests, Packager, ArkInv — Remote Inventory Management.
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Compressed Chests
Organised and compressed chests
Packager
Adds a new craftable moving box item that allows for moving any block from one place to another in survival, regardless of nbt or other conditions.
ArkInv — Remote Inventory Management
Inventory - Management - Plugin
Magma Cream Craft
Now you can craft Magma Cream from stonecutting!
Virtual Storage
Virtual Storage is a personal storage plugin for Minecraft 1.20+ with up to 16 permission-based 54-slot pages, a customizable GUI, automatic item saving, admin storage access, Discord webhook support, and Paper-compatible server support.
GideonLobby
A modern and modular lobby framework built for Paper servers.
LunaSMP Plugin
LunaSMP is an all-in-one Paper plugin for SMP and survival servers that puts the most important features in one plugin.
qKiller
A lightweight Minecraft plugin that adds a player bounty system with economy integration, a GUI browser, persistent SQLite storage.
BackPack [1.21.1+] | MySQL & YAML | Rank-Based Sizes | Admin Inspect
A high-performance MySQL backpack system for professional networks.
ServerCreators - Schowek
limits pvp storage
More Recipes: Change Copper Golem Pose
Change the Copper Golem pose for storage without having to place, change, and break each one individually.
Cobblemon Poke Power
Adds a Pokemon based powersource for your tech mods that uses your Pokemon to power it!
PROXY protocol Wrapper
A lightweight Fabric server-side mod that adds native support for the HAProxy PROXY protocol v2 to forward real player IPs.

chronovault-backup
Incremental backup — only saves changed chunks. Hot-restore any region without restart, or rollback selected chunks from any snapshot. Built-in web panel.
Magnot
Tired of your magnets messing up your auto-crafts? Well, Magnot! Define walls or areas which block magnets from any mod. Filters coming very soon. :)
LoxyStackTweaks
Safely improves Minecraft stack sizes by normalizing small vanilla stacks to 64, with configurable whitelist, blacklist, modded compatibility and reload commands.
OneStackMax
A datapack that makes all items unstackable
Ultra Condense
Lets you further compact blocks like Coal blocks and iron blocks to Condensed blocks
TudySpawners
Ultimate Spawner Management Plugin
MaxEntitiesInChunk
Manage or Restrict the number of entities in each chunk. specially adapt to Mohist Server.| 限制每个区块的实体上限,并适配Mohist。
Bundle Bin
A craftable Bundle that deletes it's contents, great for clearing up junk from your inventory
YAPS AntiCheat
Yet Another Powerful Shield — an all-in-one anti-cheat for modern Paper 1.21.x servers, featuring 18 detection modules, an advanced ban punishment system, and a admin GUI.
OathPotion Stacking
Allows for easy Potion Stacking with limits to what can be stacked and what can't, easy use for any server.
checkered sophisticated backpacks++
adds checkered pattern to your backpacks + tanks visually bigger, battery is longer in the side by side way and thinner in the front and back way + gage is longer and a little more Precise.
Traveler's Backpack: Stack Upgrade
An addon for Traveler's Backpack that adds a upgrade to stack items beyond 64.

Craftable honey bottles
Adds a crafting table recipe for honey bottles (3 honeycomb + 1 glass bottle = 1 honey bottle). Works alongside the vanilla method — nothing's removed. Datapack only, no mods needed.
Pixel Warp
Advanced Minecraft warp management plugin featuring GUI navigation, smart teleportation, analytics, encrypted storage, backups, and FILE/MySQL support.
Regen Item
It makes it so that if you put an item in the chest and someone takes it out, it regenerates instantly
BasedInv
A starting inventory for servers. Lets you edit configs to have a first join and a respawn inventory!
DN-Storage
A powerful GUI-based item storage plugin with automatic categorization, auto-pickup system, and mult
Redyeable Backpacks
Reliable backpacks (mod) are now fully dyed with color!
Glass Break
YOU CAN CRAFT PUNCH GLASS SAFELY!
Void Cleaner
VoidCleaner automatically and intelligently cleans up dropped items, projectiles, vehicles, and mobs from your server, storing them in a special "void" (storage).
Shared Chest
GlobalChest is a lightweight and efficient utility plugin for Paper/Spigot servers that provides a shared inventory accessible to all players via a simple command.
BitGrid
Database-Driven Digital Storage
StoeriiMC-Plugin
StoreiiMC turns specific chests in your world into secure, web-accessible "Drives." You can drag-and-drop files from your browser into a chest, edit text files live, and stream music, all stored entirely within Minecraft's NBT data (Maps inside Shulkers).