Minecraft Java 1.21 Mods
Browse 3,821 free mods for Minecraft Java 1.21 — popular picks include Candles Modpack for Hypixel Skyblock, 10% Opacity Totems, Heartcore (Hardcore Alternative).
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Candles Modpack for Hypixel Skyblock
client-side modpack made around Hypixel Skyblock
10% Opacity Totems
10% Opacity totems for pvp and survival worlds

Heartcore (Hardcore Alternative)
(Made for the Heartcore modpack.) Is hardcore too annoying, and survival too easy? Than this mod is for you! Lose hearts after death, regain them by eating a Homunculus Heart!
Red-Light Green-Light Challenge
A high-intensity Red Light Green Light game inspired by Squid Game, where movement detection and timed phases create a thrilling survival challenge.
CampFirePlus
Level-up campfires: fuel, grow power, immersive survival.
TheConstant
A Fabric mod that channels Don’t Starve–style hardcore survival into Minecraft: manage health, hunger, and sanity; survive seasons, temperature, darkness, and food spoilage with crock-pot cooking and recipe planning.
Skyblock Itemtracker
This mod adds a system that tracks every time you get an item in Hypixel Skyblock for the first time.
Celestial Skyblock
A mod pack for hypixel skyblock with QoL
One Life [NanoVirus]
You have only one life (Like in hardcore) but also after your death a corpse is spawn (Last thing that they will have after you)
CoSMP
Welcome to CoSMP, a Cobblemon-powered survival experience where trainers and adventurers come together in a world full of exploration, competition, and discovery.
SpaceFrog's Cat Variant Changer
Change a cat's breed (variant type) using a vanilla/survival-friendly method. Choose from all kitty varieties: black, calico, jellie, orange (red), persian, ragdoll, shorthair, siamese, tabby, tuxedo, white & a special random type.
Minecarts with Blocks
put a block in a cart! survival friendly!
qTonttuzz Pack
This Resource Pack Is Made For PvP And Survival!
InvFrame | [Skript] | Invisible frames for survial
A simple script that allows toggling the invisibility of item frames. Friendly for Survival mode.

Bamboo Unpack
Lets you cut Bamboo Blocks into Bamboo using a stonecutter. Simple and survival-friendly.
SkyBlock But Better!
Vanilla Friendly Challenge!
Schematicon
A creative planning dimension for builders. Switch from survival to creative and back with fully separate inventories and no balance disruption.
Survival Reworked
This mod adds many custom ores, tools, armor sets, and items to the game
Special Potions
Adds new powerful potions with unique abilities like Fire, Ocean, Wind, Warden, Ender, Speed, and Strength effects for survival and PvP gameplay.
25% Opacity Totems
25% Opacity totems for pvp and survival worlds
Hero's Immersive VR
This project makes for a perfect, vanilla friendly, VR Co-Op survival experience.
Extra bone Variants!
a mod that makes the skeleton variants drop unique bones, craftable to unique variants of bonemeal and bone blocks!
Craftable Iron
A simple datapack that adds a crafting recipe for iron ingots. Originally made to skip the grind in skyblock.
Good Survival Modpack
Adds a bunch of visual mods with some technical to enhance yout survival playthrough!
Item Discovery
A small mod which lets survival players name all items whatever they want without imposing any pre-existing names.
Pass the torch
Ultra hardcore minecraft inspired from FlamingMoai's UHC: Generations, when you die the world will pass to a new player.

Real Temp
A realistic client-side temperature survival mod with dynamic biomes, weather, altitude, armor insulation, and seasons. Survive freezing winters, scorching summers, and extreme climates with immersive environmental mechanics.
(PSG) Project survival gila
Modpack for people who are doing the PSG challenge
CobbleGenerators
Modifies how cobble generators work, good for the SkyBlock gamemode
CampHealSURVIVE
A survival mechanic that turns campfires into healing sources inspired by Fortnite-style campfires.
BYD_WORLD_ULTRA
Vanilla Survival Server Basic Integration Plugin
Proclamations
Proclamations is a Minecraft datapack that lets you add in-game announcements (using the /title command) to your Survival Mode builds.
Survival Nerf
Minimalistic vanilla-flavored design and balance overhaul. Mostly reverting bad decisions the devs have made. Intended for use with Etomb's Better Survival modpack.
Block4Block Plugin - Advancements
(Recommended Plugin) Survival mode with a unique cost to breaking blocks.
OBE x Hypixel Skyblock
Adds textures for some Hypixel's Skyblock skulls so they can be optimized by OBE
Stamina and Weight
A configurable survival mod with two main mechanics: stamina and weight. Stamina affects movement and combat, while weight changes how equipment and items impact gameplay. Most features can be balanced through config files.