Minecraft Java 1.21 Mods
Browse 16 free mods for Minecraft Java 1.21 — popular picks include Auto Rocket+, Stellar Depths, Space Update.
Updated daily
Auto Rocket+
This project has been archived due to low downloads and no motivation to continue updating. Auto Rocket+ automatically equips fireworks while flying with an Elytra and restores your previous offhand item when you land. Toggle it anytime with R.
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"

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!
Nerflytra - Nerf elytra boosting
Disable or discourage using rockets while flying, performant and configurable.
Chickenfix
A really hacky workaround for chickens suffocating when growing in a 1x1 space, designed for my fox-based chicken farm (temporary fix for MC-9568)
Quiet Apocalypse
Atmospherice, cosmic horror mod (megalophobia)
Simple Space Mod
Extends world build limit and add damage on height above 500 blocks and without water breathing effect
Pocket Lint
A progression mod built on the paradox of scaling worthless domestic debris into god level cosmic utility.
MagicFactory
Mod adding a new liminal space
Only Auto-jump!
deletes your ability to jump by yourself using Space
RPG PLUGIN
Create a highly detailed RPG-7 weapon mod. The weapon is based on a crossbow and fires explosive rockets instead of arrows. Rockets create a large explosion on impact, destroying nearby blocks
Unslotted
Removes a considerable portion of your inventory slots, turning them into a space you can drag items around freeform instead.
SpaceAccents
A minecraft plugin that allows adding new, customizable accents to your minecraft server!
Weapons of Mass Destruction
A redstone-powered mystery cube that dispenses gloriously unbalanced weapons - over-enchanted gear, a rocket launcher, a drivable tank, a fighter jet, and a tactical nuke. Endlessly repeatable, fully configurable, and land-claim friendly.
Minecarts Load Chunks
A quick and dirty data pack to load a 3x3 chunk space around every minecart in the world.