Minecraft Java 1.21 Mods
Browse 861 free mods for Minecraft Java 1.21 — popular picks include Naturalis - Realistic Remorphed, More Advancements, AutoLandingWater.
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Naturalis - Realistic Remorphed
RP Survival morph progression for ReMorphed: Knowledge XP, instincts, Resonance bonding, Humanity, and body-specific mechanics.
More Advancements
More Advancements is designed to flesh out your survival experience, adding new advancements that bridge the gap between major milestones

AutoLandingWater
s long as the player has a water bucket in hand, falling from a height of three blocks or more will trigger an automatic water landing, ensuring the player's survival
Redstone Power Enhanced
Redstone Power Enhanced is a mod that aims to enhance the creative experience in minecraft with new redstone blocks.
Mafish Crafting (马夫鱼:合成)
🐟📘 一个马夫鱼模组的附属,让这个模组的物品可以在生存模式下获得 A mafish-learning extras adds a few recipes for survival
Survival Plus
A Minecraft gameplay mod bringing back the danger of survival with new mobs, features and base game changes.
Creativerse
Survival and Creative mode dimensions in the same world!
JSST
A suite of server-sided quality of life tweaks and survival-friendly tools.
Radiach
This hardcore mod adds radiation to all biomes. From the very beginning the player will be accompanied by radiation
Server Optimiser V2
Smart server optimization with optional TPS control. Reduce RAM usage 25%. Perfect for survival/skyblock servers. Entity optimization, chunk management, system monitoring.
mc extremo 3 mod
A mod that aims to faithfully recreate the Minecraft Extremo 3 experience from Eufonia and AuronPlay, including hardcore lives, danger levels, PvP, vengeance mechanics, custom HUD elements, and special events.
ZombieApocalypse999
Zombie Apocalypse 999 is a comprehensive zombie survival plugin that introduces unique zombie mutations, an evolving threat system, player infection, custom crafting, safezones, and configurable gameplay mechanics.
Skyblock Dimension
Adds a skyblock dimension that features custom crafting and loot tables

Hardcore Totem Nerf
A hardcore-inspired collection of nerfs and debuffs applied to Totems of Undying.
(Ultra) Hardcore Life Sharing
Share a life count among players in a Hardcore server, works with Ultra Hardcore too
ShieldStatus Mod
This mod adds a simple color indicator — green when your shield is active, red when it’s disabled or recharging. Perfect for PvP and survival players who want better combat awareness without clutter.
Breakable Blocks
Make Blocks like End Portal Frame and Spawner Breakable and Obtainable in survival
Catacraft
Transforming the familiar landscapes of Minecraft into a hauntingly beautiful and treacherous wasteland, this data pack offers players a gripping post-apocalyptic survival experience.
Hardcore Revive Reloaded
Implements a three life system that creates a more multiplayer-friendly hardcore mechanic. Discontinued -- Use the new Hardcore Revive+ instead.
The Grinding Table
Uncrafting, recycling, and more, all in one block.
Vanilla Items Expanded
Adds new QoL items like magnets to make survival better. Vanilla friendly!
Pokepuram !
PokéPuram is a feature-rich Cobblemon server blending classic Pokémon mechanics with vanilla Minecraft survival. Battle, catch, trade, and compete in an active community built for both adventurers and competitive trainers.
MiningQol
MiningQOL for hypixel skyblock. 1.21.10 fabric, yes it is Ai/vibe coded, shut up
Milestone
A fresh take on Skyblock. Where almost every mechanic is expanded, every item is obtainable and every thing was made beautifully ♡
OneBlock CraftBound: Classic
A custom NeoForge OneBlock mod with phases, rewards, chests, mobs, and a true one-block start.
No Creative In Survival
NoCreativeInSurvival Prevents players from switching to Creative mode while in Survival. Automatically forces Survival mode with a warning message.

Beter Ultra Hardcore
Improving hardcore redim for playing both on a server with friends and in the local world in hardcore mode
Aeternum Seasons
A dynamic and realistic station system for Minecraft Survival. Eng & Esp | Plug & Play
Simple Invisible Light
A datapack that adds an easy-to-craft and use, invisible survival light.
Health-Sync
Health-Sync -- Link hearts, hunger, and effects with your entire squad! Damage is shared instantly—if one takes damage, everyone feels it. The ultimate Health Share plugin for cooperative survival and hardcore challenges.
GlassSync
A mod for Hypixel Skyblock that fixes the clientside desync of glass pane block states on 1.21. This allows for easier aiming at glass panes for gemstone mining.
Improper's 3D Minimap
Minimap but with 3D terrain. Enhance your survival caving experience with this radar!

BlockFront Survival Patch
Datapack designed to enhance your BlockFront experience outside of custom games
Simple Shopping
Allows for simple, scam-free, grief-free shopping on your survival server!
Better Left Click
Allows you to use left click bind like normal but not lose out on the competitive and survival advantage of using a keyboard key.

Project AZOTH Cobblemon Modpack
Project AZOTH is back and better than ever. Explore a fresh take on the Pokémon experience in Minecraft with seamless open-world mechanics, community-driven events, and an immersive survival adventure.