Minecraft Java 1.21 Mods
Browse 296 free mods for Minecraft Java 1.21 — popular picks include Forbidden Blocks Paper, FirmaLifeHardCore, Crashy!.
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Forbidden Blocks Paper
This powerful plugin allows you to meticulously control the building environment by restricting the placement of specific items based on their display names. For instance preventing unwanted placement of named or lore containing blocks – ForbiddenBlocks
FirmaLifeHardCore
A mod that completely overhauls Firmalife's cellar and greenhouse mechanics — no Climate Station required. Enclosed spaces are auto-detected via BFS floodfill with dynamic AABB tracking. Any insulating blocks form a functional cellar or greenhouse.
Crashy!
What if your house could become a weapon?
Beautiful Auctionhouse
An Serverwide Auctionhouse with inbuild GUI and Bank. You exchange by Emeralds
Sideways Building
This is a building mod that introduces an overhauled placement mechanic for stairs and other blocks in Minecraft.
Folia Shop
A modern, high-performance shop plugin built for Folia, and modern Minecraft servers. FoliaShop combines a powerful GUI shop, Worthify-style selling system, Auction House, Custom Items Support, advanced item matching, in-game edito
Wand of Replication
Unleash the magic of duplication! The Wand of Replication lets you instantly copy blocks and small structures, making building faster and more efficient. An essential tool for every serious Minecraft builder.
Breached
Breached is a competitive Minecraft survival mod inspired by Rust, built for players who enjoy looting, PvP, raiding, and base-building. It keeps much of Minecraft’s core survival identity, but adds unique systems that force raiding/basing/PVP.
ArcaneAuctionHouse
💎 The ultimate Auction & Gifting system for Paper 1.21+. Modern GUIs, Multi-Slot Selling, Taxes, Expiry, and fully configurable. 🚀
Spyros Tools
Adds a GUI with many useful tools for Building Server: Warps, Player TP, Effects, Attributes and much more. + Tutorial how to customise the DataPack and make it your own.
BidVault
A complete server-side Auction House system for Minecraft 1.21.4 with built-in economy, advanced filtering, live search, pagination, and an intuitive chest-based GUI.
Unpackable Ice
Unpacking recipes for Packed Ice and Blue Ice. Revert them into their base forms in the crafting table.
Crafting Recovery
Crafting Recovery lets you break items back down into base materials, enhancing reclaimation of resources, by adding intiutive reversal recipes for early-game items.
PLASTIC CRAFT
A unique expansion that introduces versatile plastic materials, custom building blocks, and tools to upgrade your Minecraft survival experience.
StableAuction
A stable, no bugs, modern feature rich auction house.
Project Tiger
This is a light weight w.i.p mod with new buildings and blocks
SaveCoords
Save your coordinates with a configurable limit and SQLite/MySQL database support.
CasleRush
CastleRush, inspired by the German Youtubers "Rewinside" and "Ungespielt". A Paper Plugin that you can install to play an optimized version of the Format. Build your Castles with how many friends you want and race against them at the end.
Bronze Age Mod - A Dip In The Past
Immerse yourself in the Bronze Age! Meet new metals, building blocks and foodstuff which will bring you back to an Age of Heroes.
zLink
This plugin adds a configurable way to create your own minecraft bridge linking system. It connects via mongo database (more on the way) and gives user a code to link on your application/project.
Speedy Ghasts
This datapack increases the happy ghast base speed, going even faster when you fly above the clouds, you can even use speed potions to really chase the skies!
Very Much of Create
A massive Create-focused modpack that expands automation, transport, and industry to the extreme. Featuring dozens of Create add-ons, new biomes, food systems, and performance optimizations — perfect for building huge factories, trains, and mechanical worl
Create: Steam & Stone
Create: Steam & Stone is a steampunk-inspired Minecraft modpack focused on mechanical automation, industrial progression, and immersive worldbuilding powered by the Create mod.
Slow Building
Slows down placing certain blocks: hold right-click, watch the progress bar, then the block is placed.
RXVY AUCTION HOUSE
tired of auction house plugins that dont work and are boring? well welcome to the rxvy auction house plugin and if you need help or questions go to https://discord.gg/Xx8h2Th8qv
Mousie Builder Toolkit
Mousie Builder Toolkit adds a set of powerful yet easy-to-use tools that make building easier and give you the freedom to create without the usual limitations.
dde's Amazing Mod
Adds new blocks, items, potions, and small gameplay features focused on fun building, utility tools, and lighthearted content.
RandoWand
RandoWand What it does It adds a wand that randomizes blocks when you add them to it, which helps with building gradients in Minecraft. It is a simple mod with simple mechanics, so don't expect anything special.
Masterpieces
A collection of real-world masterpieces turned into Minecraft paintings. Display iconic artworks in your castles, galleries, and mansions.
Omnia
This project adds a massive, carefully curated 350+ mod experience. Omnia combines next-gen aesthetics (Distant Horizons, Shaders), deep farming/building mechanics, and epic exploration into one uncompromising, hardware-hungry sandbox.
creatifight
A new gamemode for players who want the thrill of building and fighting without worrying about damage and dying. Like creative mode, but with aggressive mobs to battle.
Combo Tools
made stuff easier life will be easier with the new combo tools combo tools allow easier better building
DonutSMP Ah Protection
A powerful Auction House protection mod that helps prevent scams, exploits, and unauthorized actions.
FuryAntiElytra
FuryAntiElytra is a modern and lightweight base plugin for Minecraft Paper (and forks like Purpur) designed to restrict and disable Elytra flight in specific worlds.
Survival Harmony
This modpack doesn't add anything new; it simply refines existing game mechanics. It's designed to enhance the gameplay experience in the base game and make it more enjoyable.
boosCooldowns
Per-command cooldowns, warmups, limits, prices and disable rules – with a shared database so your whole network stays in sync.