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Minecraft Java 1.21 Mods

Browse 16 free mods for Minecraft Java 1.21 — popular picks include Auto Rocket+, Stellar Depths, Space Update.

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Auto Rocket+
1.21.10fabric

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This project has been archived due to low downloads and no motivation to continue updating.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.

1.4kdownloads
Stellar Depths
1.21.1neoforge

Stellar Depths

Drift through cosmic emptiness. A space exploration mod built around scale, silence, and the unknown.

461downloads
Space Update
1.21.4fabric

Space Update

dannytaylor's April Fools' 2025 "Update"

453downloads
TickWarpSleep
1.21.10fabric

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!

385downloads
Nerflytra - Nerf elytra boosting
1.21

Nerflytra - Nerf elytra boosting

Disable or discourage using rockets while flying, performant and configurable.

265downloads
Chickenfix
1.18

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)

147downloads
Quiet Apocalypse
1.21.1fabric

Quiet Apocalypse

Atmospherice, cosmic horror mod (megalophobia)

126downloads
Simple Space Mod
1.21.10fabric

Simple Space Mod

Extends world build limit and add damage on height above 500 blocks and without water breathing effect

125downloads
Pocket Lint
1.21.1fabric

Pocket Lint

A progression mod built on the paradox of scaling worthless domestic debris into god level cosmic utility.

96downloads
MagicFactory
1.21.4neoforge

MagicFactory

Mod adding a new liminal space

61downloads
Only Auto-jump!
1.21.8fabric

Only Auto-jump!

deletes your ability to jump by yourself using Space

51downloads
RPG PLUGIN
1.20

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

46downloads
Unslotted
1.21.1neoforge

Unslotted

Removes a considerable portion of your inventory slots, turning them into a space you can drag items around freeform instead.

43downloads
SpaceAccents
1.21

SpaceAccents

A minecraft plugin that allows adding new, customizable accents to your minecraft server!

30downloads
Weapons of Mass Destruction
1.21

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.

6downloads
M
1.21.10

Minecarts Load Chunks

A quick and dirty data pack to load a 3x3 chunk space around every minecart in the world.

332downloads