Minecraft Java 1.21 Mods
Browse 862 free mods for Minecraft Java 1.21 — popular picks include Sudden Death, Bazaar Flipper, Ultra Blood Moon.
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Sudden Death
Enhance the monster's abilities, survival becomes impossible.
Bazaar Flipper
Live Hypixel Skyblock profit overlay for Fabric — ranks the top Bazaar flips, craft flips, and NPC arbitrage in real time, with realistic profit math (no fantasy margins). Client-side · no API key · no macros.
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.
Times smp
Time SMP is a hardcore survival & PvP plugin where time is the player’s life. Time decreases in real-time, controls health, and powerful time-based weapons let players steal or destroy each other’s time.
ArenaMaker
Create PvP arenas for 1v1 duels and wave survival with ELO ranking, wagers, kits, and leaderboards.
Auto-Smelt Ores
Automatically smelts Iron, Gold, and Copper on break. Works with Fortune, requires no setup, and is 100% survival-friendly.
Resurrections
This is a Minecraft mod I made for my hardcore multiplayer server. After a player dies, they drop their soul which can be placed in the reviving station and revived.
Three Lives Fabric
Hardcore but you have 3 lives until you get kicked from the server.
Inventory Profiles Plus
Inventory Profiles Plus is a client-side Fabric mod for custom inventory layouts, including Crystal PvP, Mace PvP, Sword PvP, Axe PvP, building, mining, and survival setups. Quickly sort items, cycle profiles, and keep gear exactly where you want it.
Block4Block Datapack
(Required Datapack) Survival mode with a unique cost to breaking blocks.
Poseidon - Underwater Survival
Shipwrecked and stranded underwater. Breathe, build, and survive in a fully aquatic island world.
HCIM (Hardcore Ironman)
Datapack lets you continue playing after dying in hardcore.
Revive Star
The plugin provides a custom crafting recipe for a revive star. It allows you to revive dead players in hardcore mode!
Half Size
A simple data pack that shrinks the player to one block tall.
EVE - Entity Visualization Editor
The best editor text_display and item_display for survival and creativity
ExtraEnderchest
A plugin that adds the Large Enderchest (one block double inventory size) with customizable crafting recepie and extensive config
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.
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!
No Beds
This mod removes all beds from Minecraft, making sleeping impossible and forcing you to face the night every time. It makes the game harder, changes how you explore, and gives the world a more dangerous, nonstop survival vibe.
Bigger and Better?
The mod can change the body shape of any organism in survival mode
Hungerbound
FoodHearts is a hardcore survival mod where you start with just 1 heart, and the only way to gain more health is by eating unique food items. Each new food grants you half a heart no repeats, no freebies, just pure survival.
Drown Panic
"An immersive mod that enhances survival atmosphere underwater with a wide screen vignette (tunnel vision) and realistic heartbeat sounds when drowning."
More Recipes: Additional Bone Block Crafting
Craft Bone Blocks straight from Bones.
MeowFurniture
Create survival-friendly custom blocks, ores, multiblocks, crafting, and commands, with a web block generator.
Just Another Survival Debug Stick
A simple, lightweight mod that brings debug stick crafting and usage to survival mode – yet offers deep customization for those who want full control.
Wararmbise
Equip yourself for the frontlines with specialized field medic uniforms and tactical camouflage gear designed for both stealth and survival.
Graves PRO
⚡ Grave system for modern survival servers ⚡
QoL
(1.21.5+), Adds Quality of Life features that everyone needs in their Survival worlds/servers (will also include some of my other datapacks/mods in here)
Burning Daylight
Adds a survival twist to your gameplay with a plugin that causes players to take damage when exposed to sunlight.
Simply Fly
It just adds a survival command. /fly lets you fly just like creative mod for constructing.
Smp Launch Plugin
SMP Launch is a streamlined and lightweight Minecraft plugin designed to automate the chaotic start of a new Survival Multiplayer (SMP) season. With the simple command /smpstart
Hardcore Spawn
Changes spawn mechanics to be more difficult with the end goal of setting you spawn point in a different way.
Villager Breeding Tweaks
A plugin that decreases villager breeding cooldown and growing age, making villager breeding and growth faster for survival servers and SMPs.
Far Frozen
Will you be able to survive and escape the frosty, Far Frozen landscape? All cold biomes. Hard early game survival.
Better Buttons & More Trapdoors
Get 6 trapdoors from the recipe, and 8 buttons from one block.
Sleep Anywhere (/trigger liedown)
/trigger liedown With a simple survival-command, you can lie down (sleep) anywhere!