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Minecraft Java 1.21 Mods

Browse 141 free mods for Minecraft Java 1.21 — popular picks include KnightTowns, Hard Spawners, TreexCastle.

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KnightTowns
1.20.1

KnightTowns

A lightweight plugin for managing towns, claiming land, assigning ranks and protecting areas with XP and level integration.

281downloads
Hard Spawners
1.21.6fabric

Hard Spawners

Makes spawners spawn mobs if broken, primarily made for use with dungeon mods

271downloads
TreexCastle
1.20

TreexCastle

Durable blocks that drop loot. Gui support

270downloads
Descent Dimension
1.21.10

Descent Dimension

Datapack that adds a new, late game, looter-dungeon dimension.

251downloads
ViMo
1.21.1neoforge

ViMo

This mod adds classes, magic, weapons inspire by Castle Crashers

240downloads
AssasinsMonarchs
1.20

AssasinsMonarchs

A medieval factions plugin with unique races, custom abilities, and a dynamic crown system that lets players fight for leadership and control of their faction.

235downloads
MIA RPG Client
1.21.1fabric

MIA RPG Client

Welcome to the ultimate Minecraft RPG experience! Our server combines classic survival gameplay with deep RPG mechanics, challenging dungeons, and endless exploration opportunities.

235downloads
Mia RPG Server
1.21.1fabric

Mia RPG Server

Welcome to the ultimate Minecraft RPG experience! Our server combines classic survival gameplay with deep RPG mechanics, challenging dungeons, and endless exploration opportunities.

234downloads
Empyreum SMP
1.21

Empyreum SMP

Empyrm Weapons adds powerful mythological weapons inspired by Greek gods to the Empyrm SMP — a scripted Minecraft server centered around divine kingdoms, corruption, and legendary combat. Wield weapons blessed by Zeus, Hades, Artemis, Ares, Hephaestus, and

231downloads
[CDM] Caffeine Dungeons Mod
1.21.5fabric

[CDM] Caffeine Dungeons Mod

A mod that adds many QoL additions to the DungeonDodge minecraft Server

230downloads
Shadow Addons
1.21.10fabric

Shadow Addons

Adds shadow-themed blocks, tools, enchantments, dungeons, and custom challenge spawners.

229downloads
MagicStructure
1.21

MagicStructure

Add trees, dungeons, new buildings, and flying islands from schematics to your world generation.

225downloads
Dungeons Tower
1.21.11

Dungeons Tower

A plugin for automatically generating mazes and tower-style dungeons in Minecraft by reading structural data from JSON files.

210downloads
Siege!
1.21.5

Siege!

Medieval Weapons, adding variation and choice to combat in Minecraft!

198downloads
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)

197downloads
Hollowing Demise
1.21.11fabric

Hollowing Demise

Dead players become spirits with healing mechanics inspired by Hollow Knight.

195downloads
Dungeon Loot Configurator
1.21.1neoforge

Dungeon Loot Configurator

Adds datapack-driven loot-table integrations that allows loot -tables to add things into other loot-tables

188downloads
Hollow Knight: Silkcraft
1.21.8neoforge

Hollow Knight: Silkcraft

Welcome to Silkcraft, this mod aims to bring the kingdom of Pharloom from Silksong into minecraft!

173downloads
ProgressionDungeonRW
1.21

ProgressionDungeonRW

Replayable dungeon runs with modular generation—built for RPG progression and reward loops.

168downloads
Aqua Kingdoms
1.21

Aqua Kingdoms

Build and become the strongest kingdoms from all fight expand and invade whatever you wanna do as king

164downloads
Structure Overload
1.21.1neoforge

Structure Overload

Transforms your Minecraft world into an endless sprawl of structures, spawning vanilla dungeons at every step without compromising game performance.

151downloads
Fallen Kingdom Generator
1.21.4

Fallen Kingdom Generator

Small datapack to easily generate ready-to-play fallen kingdoms to play with friends in LAN or on a public server

150downloads
DungeonRefresher
1.21

DungeonRefresher

Automatically regenerates loot in chests, barrels and vaults with custom cooldown and vanilla loot table support.

145downloads
Conquest SMP's Crown
1.21.11

Conquest SMP's Crown

A legendary Minecraft crown that transforms its wearer into the true ruler of the kingdom. While wearing The Crown, you gain incredible defensive abilities and command an immortal army of loyal Royal Guards.

140downloads
The Dungeon Experience
1.21.1neoforge

The Dungeon Experience

Adds content from Minecraft Dungeons in a pretty vanilla way.

140downloads
Hollow Life
1.21.4

Hollow Life

I mixed Hollow Knight and Grian's 3rd Life

140downloads
Enhanced Spawners: Chambers of Control
1.20.4

Enhanced Spawners: Chambers of Control

Enhanced Spawners: Chambers of Control lets players upgrade and customize mob spawners using survival items, with full redstone control and spawn egg integration — all without commands or GUIs. Designed for clean, technical mob farms and dungeon systems.

140downloads
BandanaKnight's Battle Flask's
1.21.1neoforge

BandanaKnight's Battle Flask's

A Mod Inspired By Terraria's Flask System!

137downloads
MSRdungeons
1.21

MSRdungeons

MSRDungeons is a Paper/Purpur plugin for **resettable wave-based dungeons** with MythicMobs integration, team participation rules, rewards, cooldowns, and schematic restore.

126downloads
Improved Structures & Dungeons
1.21.10

Improved Structures & Dungeons

The combination of all minecraft Structure & Dungeons Data Pack

121downloads
DungeonDodge EMI Integration
1.21.1fabric

DungeonDodge EMI Integration

A mod that adds EMI integration for the DungeonDodge Server. Only for mining, and manually added, so it is not dynamic and may not be up to date.

114downloads
Dungeon Loot Manager
1.21

Dungeon Loot Manager

GUI-based dungeon loot editor for Spigot / Paper / Purpur 1.21.10-1.21.11

110downloads
Hallownest's Remains
1.21.1neoforge

Hallownest's Remains

This mod adds the remnents of the ancient civilizations of Hallownest and Pharloom from Team Cherry's Hollow Knight and Hollow Knight: SIlksong.

108downloads
CasleRush
1.21.11

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.

101downloads
DRdung
1.16

DRdung

Plugin for custom dungeons with resources

100downloads
MCDE Recipe Fix
1.21.1fabric

MCDE Recipe Fix

Fixes MC Dungeons Enchanting's recipes, which do not work on some versions.

98downloads