Minecraft Java 1.21 Mods
Browse 148 free mods for Minecraft Java 1.21 — popular picks include Sanity System, MobPVP // CANCELLED, Core Companion.
Updated daily
Sanity System
A subtle psychological horror mod that adds a hidden sanity system, immersive hallucinations, and fear-based survival mechanics to Minecraft 1.21.4 Fabric.
MobPVP // CANCELLED
MobPVP transforms your Minecraft survival experience by assigning levels to every living creature in the game. Based on these levels, mobs gain different abilities, attributes, and loot chances, creating a more challenging and rewarding combat system.
Core Companion
An owner-bound AI companion that chats, remembers, builds a relationship, and runs survival tasks with Baritone path finding — local or cloud AI, optional voice and vision.
Limitbreak
Minecraft transformed into a roguelite wave-survival RPG with classes, relics, bosses, and permanent progression.
Frens
Companion bots for Minecraft with survival skills, autonomous behaviors, and persistent inventories. They can woodcut, mine, fish, build shelters, ride animals, follow and defend, return to base & sleep at sunset.
Graveling Zombies
Zombies now drop gravel when killed, letting you double dirt easily and speed up your Skyblock builds!
JOJO - stone block crusaders
Many features from the popular manga/anime jojo's bizzare adventure (jjba)
Help Me Hardcore
Help Me Hardcore Adds All Kinds of Extra Challenges from Community Ideas to Full-Themed Updates for Your Hardcore Worlds or Even Hardcore SMP Servers!
Petroglyph
This Datapack changes deserts and desert survival. It adds hydration, changes World generation and adds unique artifacts. Survive in the desert!
Zombie Drops OP Loot
Turn zombies into an overpowered loot source for intense and rewarding survival gameplay.
BloodInfection999
Delve into a world ravaged by a terrifying blood infection, where once-peaceful creatures are corrupted and your own survival is constantly under threat.
Better Happy Ghasts – Fly & Ride
Reimagined Happy Ghasts that make flight and survival more interesting
Oculus of Silence
Oculus of Silence is a magical survival artifact that repels nearby hostile mobs for 30 seconds
NPC Mannequins in Survival
A Paper plugin allowing for vanilla mannequin mobs to be used in survival
Better Rotten
BetterRotten adds a small but immersive way to recycle rotten flesh instead of letting it pile up in chests. Turn zombie drops into useful leather scraps, combine them back into full leather, and integrate the cycle into your survival progression. The mod
Sandy Husks
Husks now drop sand when killed, with chances increasing using Looting - perfect for Skyblock and fast sand farming!
Sanity System – Psychological Survival
A subtle psychological horror mod that adds a hidden sanity system, immersive hallucinations, and fear-based survival mechanics to Minecraft 1.21.4 Fabric.
![UltraSpawners [LITE]](https://pub-2ae937f770284535a96c3330f91236aa.r2.dev/thumb/modrinth/151436.webp)
UltraSpawners [LITE]
UltraSpawners is a lightweight spawner management plugin featuring basic stacking, simple trust permissions, and economy based mob unlocking, designed for survival and economy servers.
Deaths Accounted For (DAF)
A lightweight mod focused on tracking kills, deaths, and enforcing a configurable death limit for competitive or hardcore servers.
Area Light Up
Automatically places torches in dark areas to prevent mob spawning. Preview scan, survival inventory support, and grid-based placement for efficiency.
Paleolithic Era
Adds paleolithic era crafting, survival tools, and tech to early Minecraft gameplay. Expands the early game tiers a bit more.
Sudden Death
Enhance the monster's abilities, survival becomes impossible.
Ultra Blood Moon
Blood Moon turns ordinary nights into survival events with stronger mob variants and unique lunar events, pushing players toward inevitable, high-stakes encounters.
SurvivalReborn
Survival Reborn enhances Minecraft survival with dynamic terrain, new biomes, and unique mobs, offering fresh challenges and gameplay mechanics. Explore, craft, and survive in a world full of adventure, ancient secrets, and powerful items!
PermaEfe Extreme Survival
PermaEfe is a Minecraft datapack that increases the difficulty progressively for 30 days, with mechanics such as permanent death, boosted mobs and unique craftables. Ideal to play with friends and test your survival.
Bigger and Better?
The mod can change the body shape of any organism in survival mode
ZombieSMP
Turns Minecraft into a contagious zombie survival experience: quadruple zombie spawns, explosive beds, and players who become zombies after infection. Perfect for custom server SMP events and dangerous nights.
MZZ's Desert Survival
Makes the whole world a desert; overhauls Minecraft's crafting recipes to provide unique progression and highlight Minecraft's overlooked features.
Villager Breeding Tweaks
A plugin that decreases villager breeding cooldown and growing age, making villager breeding and growth faster for survival servers and SMPs.
Nether Improvements
Configurable, survival friendly tweaks to make the Nether more interesting on Vanilla servers!
Better Carpet Bots
Better Carpet bots, more options and regulations for survival via the /bot command
Theyab Skyblock: Ramadan
A Ramadan-themed Skyblock mod with a custom trader, currency system, and themed food items.
![Simple Egg Spawn Recipe [MOD]](https://pub-2ae937f770284535a96c3330f91236aa.r2.dev/thumb/modrinth/290549.webp)
Simple Egg Spawn Recipe [MOD]
Designed to expand survival progression by making every spawn egg obtainable through crafting rather than relying on creative mode or 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.
CraftStands
A Crafting Focused Armor Stand Datapack focused on Survival, Limited, but unique Armor Stands. Unique functionality with special item based animations & commands!