Minecraft Java 1.21 Mods
Browse 127 free mods for Minecraft Java 1.21 — popular picks include OneHitTree, Sanity System, MobPVP // CANCELLED.
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OneHitTree
OneHitTree instantly breaks entire trees with one block hit. This lightweight plugin works across Minecraft 1.13-1.21, featuring configurable options and automatic leaf cleanup for efficient wood gathering.
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.
I do what mojang does not
It will add a BrainInAJar, DispenserColorApplier, VillagerOnALeash, FlowerColorApplier, and EveryBlockDealsFallDamage to your Survival Gameplay :
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!
JOJO - stone block crusaders
Many features from the popular manga/anime jojo's bizzare adventure (jjba)

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.
Moar Spears
16 new spear types with unique, powerful, wacky, and OP abilities, all while fitting nicely into vanilla survival.
Oculus of Silence
Oculus of Silence is a magical survival artifact that repels nearby hostile mobs for 30 seconds
Bladebound
Bladebound adds named swords with unique effects, lore, and world-generated shrines designed for natural survival progression.
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.
SQBubliks: Restart
A reboot of vanilla survival, but with mods, travel, new structures, lots of mechanics, and magic!
Pickaxes+
a collection of cursed, enchanted, and hella beefed-up pickaxes designed to make your survival world weep and your friends ask 'what the hell is that.'
Dormant Sigil
Adds an item that has the ability to revive your friends in Hardcore Multiplayer.
jojo-saints relics
a datapack based on jojo's bizzare advanture current stands: soft and wet star platinum the world king crimson crazy diamond killer queen something of note: getting stands in survival is currentally impossible use the next commands to get stands:
Paleolithic Era
Adds paleolithic era crafting, survival tools, and tech to early Minecraft gameplay. Expands the early game tiers a bit more.

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.
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.
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.
Revive Star
The plugin provides a custom crafting recipe for a revive star. It allows you to revive dead players in hardcore mode!
ExtraEnderchest
A plugin that adds the Large Enderchest (one block double inventory size) with customizable crafting recepie and extensive config
Mushoku Craft
A hardcore RPG mod inspired by the Mushoku Tensei universe. Master intense sword styles, level up magical schools from scratch, and forge powerful modular artifact weapons using custom mini-games.
Burning Daylight
Adds a survival twist to your gameplay with a plugin that causes players to take damage when exposed to sunlight.
LogicGates
Forget about giant Redstone logic gates. All logic gates in one block!
Soulbound SMP
Soulbound Hardcore SMP with Souls & Hearts
Minecraft, But Keep Moving or Die!
This datapack introduces a unique survival challenge where players must maintain continuous movement to stay alive. When a player remains stationary, they begin taking progressive damage until they move again or perish.
Enchanted Loom
A plugin for 1.21.11 that adds an Enchanted Loom to Minecraft. This can be configured for survival but allows easier banner creation.
Nether Improvements
Configurable, survival friendly tweaks to make the Nether more interesting on Vanilla servers!
Artilide
Artilide is a modpack that attempts to transform Minecraft's balancing and base mechanics to keep survival aspects for late game, along with overhauling exploration as a whole.
Tool Forge
Datapack that adds new tool/armor sets and other features to improve survival gameplay
Bountiful Amethyst
A mod that gives amethyst more uses. Tries to be vanilla and survival-friendly.

Hammer-On
Anvils can now take damage from falling one block. Made for balancing carpet extra's renewableSand.
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.
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.
Against the Wild: Realistic Survival
Against the Wild is an immersive realism mod that transforms Minecraft survival into something that actually feels like fighting to stay alive. No magic shortcuts, no easy starts. The world is harsh, unforgiving, and beautiful just like the real wilderness
The Krptonians
A mod made in 3 hours that aims to add Kryptonian superpowers and supermans costume! fully obtainable in survival! (part of my 3 hour challenge series)