Minecraft Java 1.21 Mods
Browse 150 free mods for Minecraft Java 1.21 — popular picks include SpacePvP, Restricted Rockets, Vortex.
Updated daily
SpacePvP
Unique plugin for battles using /pvp or custom cabins.
Restricted Rockets
Restrict how many rockets players can use while flying with an elytra before having to land again.
Vortex
Server-side modpack analytics developed by Atmospace. Tracks player usage of modded blocks, items, crafting, and entities. View in-game summaries and get CSV reports on shutdown to optimize your modpack based on actual player engagement.
Sticky Fireworks
Rockets that stick to nearby mobs and launch them into the sky!
SpaceFrog's Hungry Hungry Frogs
Frogs extra hungry & extra powerful: Frogs can eat all hostile vanilla mobs, and the elusive, immortal, insatiable ÜberFrog will one-shot kill any hostile! Build a frog army today!
Eternal Firework Rocket
A non-consumable firework rocket has been added, which can only be obtained in the End City or by command. 增加了不会消耗的仅飞行用烟花火箭，只能在末地城或用指令获取。
Steroid Planet
Steroid Planet adds a high-stakes bodybuilding system to Minecraft! Unlock tiered steroids (I/II/III) to boost muscle mass, reduce body fat, and chase extreme milestones.
Interstellar: Galaxy
Travel throughout the galaxy
Sky Crushes
SkyCrushes is a progression-based processing mod that adds mechanical Trituradores (Crushers) to process raw minerals, geodes, and space materials.
Fast Path Original
You run faster when running on a path (original from planetminecraft)
AFK-Preventer
Prevents AFK kicks by randomly pressing movement keys (W/A/S/D/Space) every 20-40 seconds while you are in-game.
Infini Rockets! 🚀
Infinite Rockets here we come!
Space Station Craft 14
This project aims to recreate the game Space Station 14 in Minecraft.
RocketLauncher
Adds a new enchantment for the crossbow that makes you fly through the air when you fire a rocket of any level.
Mega World Height
Mega World Height expands the Overworld build and generation height, giving you much more vertical space for mining, building, exploration, and custom world generation. By default, Minecraft’s Overworld height is limited to a smalle
Laicaps
[Alpha] A fantasy space exploration mod - for neoforge 1.21.1
Stellar Depths
Drift through cosmic emptiness. A space exploration mod built around scale, silence, and the unknown.
Space Update
dannytaylor's April Fools' 2025 "Update"
MAKE YOUR BUILDING LIMIT UP
Think Minecraft doesn't have enough building space? Want to build taller buildings? Try our data pack and you can increase the building limit up to 4064 blocks!!
MrMexican
A client thats use on CosmicPrisons with QOL features
Elytra toggle
This mod allows you to deactivate your elytra while flying by simply pressing the spacebar.
PriorityQueue
Make space for your VIPs on your server
Fantastic Smelting
A small mod to boost your smelting-experience. Allows you to smelt raw resource blocks, saving you time and space.
TickWarpSleep
Changes sleep to skyrocket the game's tick rate instead of flat out skipping through a night or thunderstorm. Makes the grind a little easier, and may set your server on fire!
Firework Durability
Add durability to firework rockets
Carpet Sky Additions Miller's Planet
Carpet extension providing a world like Miller's Planet from movie Interstellar, with new ways to obtain resources.
Space Explore
This mod allows you to explore an entire galaxy of unique planets
Police Space Chase
Get chased by the police for committing crimes! Reset your heat level by escaping. No resource pack
Even more Fantastic Smelting
A small mod to boost your smelting-experience. Allows you to smelt raw resource blocks, saving you time and space. Adds various recipes from the furnace to the blast furnace.
Little Adventure
Adds a backpack for extra inventory space, a torch wand for quick lighting, a mine helmet, and changes some item mechanic like holding compass will show coordinates and clock will display time.
Better Elytra Flying
When you are flying with an elytra or take off, you can click space to quick use a firework in your hotbar.
Planet Craft
A mod to create a universe with Planets, Suns and Black Holes all customizable to your liking.
Way(More)Points
Tired of lodestone compasses taking up inventory space? Repurpose them as lodestone waypoints and see important locations on your HUD! Customize each waypoint with over 50 million combinations.
DeathRecord
Records your death locations and lets you navigate back via waypoint pins, a world-space marker, and a HUD compass.
CommunityVault
A shared vault with unlimited space for all players on the server
Stellaria
A mod dedicated to fighting enemies in a space-like environment!