Minecraft Java 1.21 Mods
Browse 390 free mods for Minecraft Java 1.21 — popular picks include Building Gadgets, Security Craft, RFTools Base.
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Building Gadgets
A collection of Gadgets to make building large structures a little bit easier!
Security Craft
Adds plenty of blocks and items to defend and secure your base with.
RFTools Base
RFTools Base: base mod for all McJty tech mods
Expanded Delight
An addon mod for Farmer's Delight that adds many more crops and functionality to the base mod
Medieval Buildings - New Structures!
Add exciting medieval buildings with hidden enemies and treasures to the world!
Modular Force Field Systems (MFFS)
Use that extra power to protect your base
Pipe Connector
A tool that places pipes automatically along a selected route, with the option to set the depth. Useful for building organized networks without placing each pipe manually
ArmorPlus
ArmorPlus is a mod based on exploration, killing, building, getting geared up, fight the bosses and explore the depths of your worlds
Create Big Cannons
A Minecraft mod for building large cannons with the Create mod.
Arts & Crafts
Adds many new types of building blocks like Dyed Decorated Pots, Chalk, Terracotta Shingles, Soapstone and more!
Speed Building - Scaffolding behavior
Quickly mass place rails and ladders just like Scaffolding
Engineered Schematics
A Mod desgined to make building multiblocks more clear.
OmniTool
OmniTools is a single, versatile tool that works with multiple mods. It combines the functions of various wrenches, making building, configuring, and managing blocks easier than ever.
Portable blueprints
Tired of manually building the same structures over and over, like roads, street lamps, or houses? This mod is perfect for you! Scan your structure and create a blueprint so you can rebuild it instantly with just one click!
Roamers
Adds characters that build houses, mine blocks, and craft items!
VapourWare
Base mod that is the foundation for 1.20+ mods by VapourDrive. Contains shared code for fuel powered machines, and a wrench.
FTB Evolution
FTB Evolution re-imagines modded MC with a vast collection of advanced tech, intricate magic, and limitless exploration. Whether you're into building high-tech machinery or wielding powerful spells.
Happy Trails - Control Movement Speed
This project lets you control movement speed. This can reward road building; allowing faster movement on dirt paths and brick roads; or make walking through tall grass or on desert sands slower;
ZeroCore
A mod intended for other mod authors, it contains a revised multiblock API that support multiple client mods without performance penalities, a new new GUI system, a base BlockEntity implementation that simplifiy data syncronization and much more.
Saro´s Road Blocks
Adds asphalt with slope/stair variants, crash barriers, street lights, and road marking tools for building realistic roads, highways, and on-ramps.
Halcyon | Data & Essence
A story of reconciliation, told through a magitech mod about exploration and factory-building.
Trade Post for MineColonies
Add-On to MineColonies - with new buildings and jobs
Simple BC Pipes
A simple item and fluid transport mod to show the various features of LibBlockAttributes and provide a useful testing base for other mods using attributes.
World Editor
Make building easier with the World Editor datapack! Datapack has singleplayer and multiplayer support.
Electronic Devices
Decorative mod that adds plenty of electronic devices to decorate your house.
Tools for builders
This Mod Pack Gives You Almost ALL Building Essencials, Like Litematica for building from shematics! Theres Also More! With Some ResourcePacks That I Picked As the Dont Change A Lot And Just Make The Game Look Better!
Farmer's Larder
Farmer's Delight style foods and recipes from base game ingredients!
Real Filing Reborn
Real Filing Reborn is a storage mod built around Filing Folders — items that each hold a massive quantity of a single item type — and Filing Cabinets to house them.
LoginTo
A complete authentication solution for Minecraft servers, providing secure login, database storage, premium autologin and secure otp code with qrcode
Mindthemood's Bits, Bobs, & Buildings (Amazing Archeology)
Relics, Gadgets, Golems, and quite a lot of other stuff besides!
Brick's Building
A modpack for my Create: Aeronautics Prep Builds. Features several mods related to create as well as various QOL and building mods.
Donut Auction
a Donut Auction House plugin for Paper/Folia servers inspired by DonutSMP.
Simcraft *WIP 2025*
Enhance your mining and building expereince and extend your game
Krip Turrets
This mod will add several new types of turrets that protect you and your buildings from evil and dangerous entities.
Architectural Building Wand
An advanced drag-and-drop construction tool and structure builder. Effortlessly place blocks, build walls, and fill areas in survival using a balanced ghost block preview planner.
Greenhouse Gardener - A MineColonies Add-On
Climate-controlled farming, exotic animal ranching, new crops and new foods.