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Minecraft Java 1.21 Mods

Browse 390 free mods for Minecraft Java 1.21 — popular picks include Architect’s Toolkit, AH StatusAPI, Gendarmerie 2025.

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Architect’s Toolkit
1.21.11fabric

Architect’s Toolkit

A builder-focused modpack that adds powerful tools to make creative building faster and easier.

253downloads
AH StatusAPI
1.17

AH StatusAPI

Host a powerful, secure REST API on your own Server. Best for building your own Dashboard - For Devs and Admins

252downloads
Gendarmerie 2025
1.21.1fabric

Gendarmerie 2025

A pack with few mods that offers a bit of adventure and building while remaining lightweight

249downloads
Visor's Modpack
1.21fabric

Visor's Modpack

This is a client-side modpack that enhances Minecraft overall and makes it more fun to play. It adds a full player body and various building mods, so it's best to use on small SMP servers or similar ones to avoid potential bans.

249downloads
How Builders Grow
1.21.1neoforge

How Builders Grow

Build bigger, automate smarter, and bring your worlds to life with Create and endless building tools.

246downloads
CobbleSteam
1.21.1neoforge

CobbleSteam

A Cobblemon pack with a focus on create and building blocks.

244downloads
Minecraft Statistics
1.21

Minecraft Statistics

Player Statistics is a Minecraft server plugin that tracks and syncs player statistics to MySQL database also providing useful commands and features for both players and server administrators.

243downloads
Steam Gardens SMP
1.21.1neoforge

Steam Gardens SMP

The base modpack for the Steam Gardens SMP.

239downloads
Jon's Create Adventures
1.21.1neoforge

Jon's Create Adventures

A Create-centered modpack with extra building and adventuring mods.

239downloads
Tiny DataLib
1.21.11

Tiny DataLib

This project is a library with useful utilities such as a database system and more.

230downloads
MrChipdip's Building Pack
1.21.4fabric

MrChipdip's Building Pack

An Advanced Building Modpack

229downloads
Create Aero Mobile Cities
1.21.1neoforge

Create Aero Mobile Cities

VERY WIP create aeronautics-based modpack, focused eventually around constructing large mobile bases (through land, air or sea) as opposed to operating a larger stationary base

228downloads
Ultimate Creative
1.21.11fabric

Ultimate Creative

Experience the ultimate creative building experience with a perfect balance of optimisation and building mods, with many more to come!

228downloads
Forever Building
1.21.1neoforge

Forever Building

This modpack aims to be a life-time modpack, full of fun and creativity for me and my friends!

227downloads
Cyberforged
1.21fabric

Cyberforged

Welcome to Cyberforged! This mod aims to add a new challenge through a dangerous dimension for players who are bored with the base game.

227downloads
BalSync
1.21

BalSync

BalSync – Vault Economy Synchronization for Minecraft Server Networks with MySQL Database

221downloads
Constructum
1.21.1neoforge

Constructum

an Assortment of mods that enhance core aspects of Minecraft while staying true to the base vanilla experience.

216downloads
DeveloperMCP
1.20

DeveloperMCP

Turn your Minecraft server into an AI-controllable powerhouse. Control Spigot/Paper servers directly from Cursor/Claude via Model Context Protocol (MCP).

212downloads
SpecialMaterials
1.21.1neoforge

SpecialMaterials

This mod provides a wider variety of building blocks and their crafting methods.

210downloads
Decay Zones
1.21

Decay Zones

Create zones where placed blocks decay over time with configurable settings! This plugin is perfect for temporary building areas, minigames, or clean-up zones on your Minecraft server.

207downloads
Auction HouseX
1.21

Auction HouseX

A fast-paced, player-driven auction house built for competitive servers. Buy, sell, and flip items instantly in a clean, high-performance GUI. Designed for Paper servers, this plugin keeps the economy moving and the profits flowing 🔥

202downloads
Kinetic Worlds 5
1.21.1neoforge

Kinetic Worlds 5

⚙️ About the project Kinetic Worlds 5 is a community-based Minecraft project centered around the Create Mod. The focus is on creative building, technical progress, and complex automation—with a quest book.

202downloads
Cassetu's Building Pack
1.21.6fabric

Cassetu's Building Pack

Mods + Shaders that Cassetu uses in his builds

200downloads
Create: Signalworks
1.21.1neoforge

Create: Signalworks

Create: Signalworks is a small Create addon for building more varied redstone control systems.

189downloads
GhostbustersANTI-ESP
1.21

GhostbustersANTI-ESP

A hidden base should be discovered through exploration, not exploits. Ghostbusters-ESP provides a covenant of protection, the final solution to espers: fighting ghosts with ghosts.

175downloads
Builders Heaven
1.21fabric

Builders Heaven

Builders Heaven is a Modpack that is designed to enhance a creative players building experience. It adds more than 20 mods to help with QOL and Building

172downloads
CoinFlipExtreme
1.8

CoinFlipExtreme

layers can wager currency against each other or the house in exciting coin flip games

167downloads
Hasi's Mansion
1.21.1neoforge

Hasi's Mansion

Based on the "Luigi's Mansion" series as a fan mod

159downloads
McCastle's To the Skys!
1.21.1neoforge

McCastle's To the Skys!

Create Aeronautics holds a whole new way to apply amazing physics to your contraptions and world. To the Sky! is a mod pack that is centered around create aeronautics with a few additional mods to add to the experience for us nerds who love to tinker.

157downloads
Love for create!
1.21.1neoforge

Love for create!

NeoForge 1.21.1 Create-focused tech modpack — no quests, just relaxed long-term “forever world” building and automation.

155downloads
NLYB: Looting and Exploration
1.21.1neoforge

NLYB: Looting and Exploration

Shrink and store entire dungeons, temples, and villager houses then loot them safely from your base. (Never Leave Your Base)

153downloads
Peaceful Silverfish
1.21.1neoforge

Peaceful Silverfish

Peaceful Silverfish lets silverfish spawn from vanilla infested stone even on Peaceful. Great for Create farms and contraptions, but works perfect in vanilla too. Includes an option to mute silverfish sounds so your base stays quiet.

151downloads
Coastline: Sunbeam
1.21.1fabric

Coastline: Sunbeam

Designed to provide a lightning-fast experience, with all the building tools you'll ever need. Includes Litematica and Axiom.

151downloads
Elevator_dp
1.21

Elevator_dp

Have you always dreamed of building an elevator to hide a secret base?

150downloads
Saamchii's Requiem
1.21.1neoforge

Saamchii's Requiem

A small modpack based on exploration, magic and colony building.

150downloads
Multiplayer Mayhem
1.21.1neoforge

Multiplayer Mayhem

A cozy Create-focused kitchen-sink modpack built for playing with your friends, automation, building, and unforgettable multiplayer moments. No grindy progression — just pure co-op creativity and chaos.

149downloads