Minecraft Java 1.21 Mods
Browse 849 free mods for Minecraft Java 1.21 — popular picks include HardcoreLives, NPC Mannequins in Survival, Synchro.
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HardcoreLives
This simple plugin adds hardcore lives to your minecraft server.
NPC Mannequins in Survival
A Paper plugin allowing for vanilla mannequin mobs to be used in survival
Synchro
Synchronizes inventory, armor, health, hunger, XP, effects, ender chests, advancements, sleep, and death into one configurable shared co-op survival state.
Kindling Age
Kindling Age enhances early survival with lightweight, vanilla-friendly mechanics that make the first days more deliberate without adding grind or hard gates.
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!
Untitled Modpack - Hard Survival
Untitled Modpack enhances survival with immersive world generation, fluid movement mechanics and automation.
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!
MoreRealisticSurvival999
MoreRealisticSurvival999 brings immersive realism to Minecraft survival by dynamically managing temperature, thirst, crop rot, torch burnout, and natural plant growth for a truly challenging and engaging experience.
VanillaFactions
VanillaFactions allows survival vanilla players an aesthetic way to make use of the /teams utility.
let me stonk
poorly made stonking fix for Hypixel Skyblock
RS Infinity Booster FIXED
A Port from the original mod fixing the infinity boosters when using it in survival
Shulker in a Shulker
Store shulker boxes inside other shulker boxes with configurable nesting depth, anti-dupe protection, and admin GUI control. Perfect for survival servers - includes /ns commands, cooldowns, item blacklisting, and full permission customization.
Inferno - Hardcore
Transforms Minecraft's hardcore mode into an unforgiving survival experience.
True Nature
Realistic MC is a modpack that makes Minecraft feel real. With enhanced graphics, physics, and survival mechanics, it brings a grounded, immersive experience to your world.
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.'
Dragons and Vampires
Dragon survival and vampirism compat. Makes dragon survival dragons immune to vampirism infections.
![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.
Dormant Sigil
Adds an item that has the ability to revive your friends in Hardcore Multiplayer.
Lifesteal999
Battle for survival in this customizable lifesteal plugin featuring heart stealing mechanics, hardcore elimination, combat logging protection, and full configuration control
Hardcore Death Ban
A Datapack That Bans A Players When They Die, Like In Hardcore Mode.
Deaths Accounted For (DAF)
A lightweight mod focused on tracking kills, deaths, and enforcing a configurable death limit for competitive or hardcore servers.
Pivot
A survival-friendly all-in-one display entity editor that allows people to edit display entities ingame, also allows people who dont have the mod to join the server.
Amethyst SkyBlock
This datapack brings you into hardest possible vanilla skyblock ever. Try to survive on one floating amethyst!
BackPackSSS
Custom tiered backpacks with progression crafting, upgrade system and persistent storage — designed for survival servers.
HardcoreNecromancy
A Minecraft Java Plugin that adds the feature to revive people in hardcore mode.
Some KeepInventory
🛡️ Selective KeepInventory (Datapack for Minecraft 1.21.5) Selective KeepInventory lets players keep only specific items when they die — no full inventory saves, no complete loss. It’s a perfect middle ground for survival, multiplayer, and adventure-style
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:
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.
Place Anywhere
A Minecraft mod that allows players to place blocks off the integer grid and rotate them in survival mode. This mod is in early development and has many bugs.
Sol's Hardcore
A typical minecraft hardcore with a few mods that help the player and add some new mechanics
The Smooth Elevator
Fast, smooth, and survival-friendly elevators. Automatically detects player language and features per-rank cooldowns with LuckPerms.
Advanced Mining
A plugin that adds a powerful and customizable Mining System. Similar to the one on Hypixel Skyblock.
Sudden Death
Enhance the monster's abilities, survival becomes impossible.