Minecraft Java 1.21 Mods
Browse 422 free mods for Minecraft Java 1.21 — popular picks include Randomium Skyblock, Hard Worlds, UBS_PVP+.
Updated daily
Randomium Skyblock
A faithful recreation of Torchy's challenge: Minecraft Skyblock, but EVERY single block broken and mob killed drops a completely random item!
Hard Worlds
A plugin for survival servers
UBS_PVP+
UBS PVP is a high performance Fabric modpack optimized for competitive PvP and multiplayer Survival featuring extreme FPS boosts network optimization and clean combat visual advantages
CraftStands
A Crafting Focused Armor Stand Datapack focused on Survival, Limited, but unique Armor Stands. Unique functionality with special item based animations & commands!
Hammer-On
Anvils can now take damage from falling one block. Made for balancing carpet extra's renewableSand.
Hunter And Hunted
Hunter and Hunted makes mobs smarter and deadlier—creepers ambush from cover, skeletons kite you, and Endermen silently stalk if you stare too long. It’s a lightweight plugin that turns survival into a true predator-versus-prey experience.
Spider Drops OP Loot
Turn spiders into an overpowered loot source for intense and rewarding survival combat.
SpaceFrog's Frog Variant Changer
Change a frog's variant type using a vanilla/survival-friendly method. Works with vanilla (cold, temperate, warm) and optionally 'More Frogs 2' variants: crimson, ender, infernal, poison dart, purpur, sculk, spirit, warped, and wood.
Better Reimagined
Enjoy this survival experience in an epic and immersive adventure. It introduces new mechanics that enrich gameplay with dynamic combat, while vibrant new biomes and impressive structures encourage exploration with unique and challenging mobs
Ancient Horizons:Legends of the Abyss
Ancient Horizons:Legends of the Abyss is a survival-adventure modpack that expands Minecraft with new dimensions, terrifying monsters, rich farming, and wildlife. Explore, fight, and build in a redefined world.
No Mob SFX
In case you want an extra hardcore challenge, this pack removes all sounds from vanilla mobs. Mwhahahahaha!
xApocalypse
A brutal, customizable zombie apocalypse plugin for survival servers
Evergrowth
This mod overhauls and extends existing Minecraft features, improving core systems and mechanics to create a more advanced and engaging survival experience.
Crystal Gacha
Add the gacha from ARK: Survival Evolved
Wound & Bleeding
Wound & Bleeding adds a realistic injury system where players and mobs can bleed from combat, losing health over time unless treated with craftable bandages. It enhances tactical gameplay in PvP and survival by making every hit potentially deadly.
Mobs Drop Their Abilities
Defeat mobs and steal their powers! Unlock unique passive abilities like flight and teleportation, or use active items like the explosive Detonator. Transform your survival experience by using the monsters' own strengths against them.
Compostable
Survival friendly plugin that makes more things usable for the composter block, like rotten flesh and fish!
Waffled
This is a skyblock-style mod, but with waffles!
Skylife
A Skyblock with the goal to make everything different (at least a bit)
Blocks spawn mobs
This plugin turns harmless digging into hardcore survival – for every broken block, the world responds with a fierce invasion of hostile creatures. Are you ready for endless waves of darkness, or will you fall under the onslaught of monsters?
Custom Hyperion
This project adds a Hyperion concept, just very different and survival friendly (not OP)...
just chill
It's a laid-back survival game with friendly mobs—no enemies, just you and the game's soundtrack
Breached (Standalone)
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.
Ghastling
Ghastling is a survival-friendly plugin for Paper 1.21.6+ that lets players keep Baby Happy Ghasts (Ghastlings) as permanent pets. Prevent them from growing up, improve their AI, and build a bond through snowball interactions!
Trade Less
This data pack stops all villagers from selling emeralds Perfect for servers with a tight economy or a more challenging survival experience
More Actions: squid tentacles
This mod adds something that was sorely missing in vanilla survival: tentacles that drop from squids. Now, instead of useless ink sacs, you can get useful and nutritious food. Squids are no longer such a useless mob!
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.
Tithe
A Hardcore multiplayer mod in which death is a debt. The living can pay a tribute to bring back the fallen.
Mitos Argentinos
A survival and adventure mod that brings the myths and legends of Argentine folklore to your Minecraft world. / Un mod de supervivencia y aventura que trae los mitos del folclore argentino.
Harrowing Hells (Data Pack)
[NOW SURVIVAL SUMMONABLE] Adds the Cinderscourge, a highly developed boss entity with a diverse arsenal of attacks at its disposal. Usable in mob battles.
Scalable Mobs
A survival data pack that allows players to change the scale of passive mobs for decorative purposes.
Super Hardcore
A datapack that makes hardcore actually hard. You now only have 5 hearts and you take damage from a fall taller than 2 blocks.
SYSTEM SMP
System SMP is a premium Minecraft plugin designed for survival multiplayer servers. It adds unique features including small caps text formatting, tree felling mechanics, custom item displays, and an economy-based spawner mining system.
Player Detector
Redstone block that detects if a player is standing on it
BloodyPunch
Bare-fisted survival brutality — punch hard blocks or mobs and you bleed. Hard materials require the right tool, or nothing at all.
Blocked In Hardcore
A challenging version of the Blocked In datapack