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Minecraft Java 1.21 Mods

Browse 501 free mods for Minecraft Java 1.21 — popular picks include Noodlemancy, Performance Optimization Patch, Emerald Rails.

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Noodlemancy
1.21.3fabric

Noodlemancy

Builds upon the existing Minecraft magic systems with new redstone components, blocks, items, enchantments, and potions.

292downloads
Performance Optimization Patch
1.21.10fabric

Performance Optimization Patch

A performance optimization patch bundle, suitable for all vanilla survival players and redstone players.

286downloads
Emerald Rails
1.21.6fabric

Emerald Rails

A redstone-powered Emerald Rail for Fabric that boosts minecarts 15x faster than powered rails.

280downloads
Gateways
1.21.1fabric

Gateways

A vanilla-esque teleport pad mod for both blocks and entities with redstone compatibility

278downloads
Create: Redstone Tweaks
1.21.1neoforge

Create: Redstone Tweaks

This Create addon adds the ability to control the Frogport using redstone.

260downloads
Better crafter
1.21.1fabric

Better crafter

Adds a Smart Crafter block that automates crafting with recipe locking patterns and intelligent inventory management for redstone systems.

260downloads
QuasiDusting
1.21fabric

QuasiDusting

This Fabric mod modifies Minecraft's quasi-connectivity (QC) behavior, making it directional and toggleable by using redstone on a QC affected block

259downloads
Сreate:Connected Vessel compat fix
1.21.1neoforge

Сreate:Connected Vessel compat fix

Compatibility hotfix for a server crash caused by Create: Connected Fluid Vessels on Create contraptions hen Destroy included into modpack.

240downloads
ProxyPlayer
1.21

ProxyPlayer

Powerful player simulation for Paper 1.21.11. Spawn persistent proxies to load chunks, run farms, and test redstone without extra accounts.

239downloads
Crops growth detector
1.21neoforge

Crops growth detector

Enhance your farms with the new crops growth detector, a machine that outputs a redstone signal depending on the crops age.

228downloads
UltClearLagg
1.21

UltClearLagg

Advanced lag reduction, automatic cleanup systems, mob optimization, TPS monitoring, smart entity management, redstone lag prevention, Bedrock GUI support, and real-time server performance tools.

214downloads
Gravity Core Block
1.21.4fabric

Gravity Core Block

The Gravity Core Block is a redstone-powered device that creates an 8-block radius anti-gravity field

211downloads
Elektrofy
1.21.3

Elektrofy

A lightweight GUI resource pack designed with a redstone and energy aesthetic, perfect for tech-themed builds or mods.

210downloads
Chunk Border Redstone Highlighter
1.21.11fabric

Chunk Border Redstone Highlighter

A client-side performance debugging tool that highlights redstone components sitting on chunk borders — the #1 cause of server lag. Toggle with one keypress (O).

208downloads
Create: APU
1.21.1neoforge

Create: APU

Adds a dedicated APU (Auxiliary Power Unit) for engine cold starts and mid flight power loss. Activated with redstone and powered by coal, no need for handcranking.

204downloads
Create: Signalworks
1.21.1neoforge

Create: Signalworks

Create: Signalworks is a small Create addon for building more varied redstone control systems.

202downloads
Create Physics Staff
1.21.1neoforge

Create Physics Staff

This mod introduces a Remote Physics Staff that allows you to transform structures into fully physical contraptions from afar and seamlessly restore them back into blocks.

200downloads
Missed Tinkering
1.21.1fabric

Missed Tinkering

The combat and tinkering update added some cool things! This mod expands on the tinkering theme to provide some fun new redstone items.

194downloads
Contraptions o' Plenty
1.21.4

Contraptions o' Plenty

A Minecraft Datapack that adds in (5) Brand New redstone components!

180downloads
RegexRails
1.21

RegexRails

Add redstone logic for your detector rails. Compare minecart names, change them, and add to them.

179downloads
SerialCraft
1.21.11fabric

SerialCraft

Bring Redstone to life! A simple mod to connect Arduino and Minecraft via serial port. No complications, just plug and play.

177downloads
Redwork
1.21.1neoforge

Redwork

Redstone automation mod

176downloads
SimpleChunks
1.21

SimpleChunks

An easy-to-use chunkloader with a modern GUI, teleport system, and secure permission management — ideal for farms, redstone, and automated systems.

176downloads
Redstone Timer
1.21.1fabric

Redstone Timer

A simple Redstone Timer block for Minecraft, made to control redstone signals with a customizable delay.

175downloads
Lagmanager
1.21.4

Lagmanager

This plugin monitors redstone entity lag and keeps your TPS high through optimization ideal for server admins.

171downloads
McCastle's To the Skys!
1.21.1neoforge

McCastle's To the Skys!

Create Aeronautics holds a whole new way to apply amazing physics to your contraptions and world. To the Sky! is a mod pack that is centered around create aeronautics with a few additional mods to add to the experience for us nerds who love to tinker.

169downloads
Create: Throwrope
1.21.1neoforge

Create: Throwrope

Throw a rope to dock your contraptions!

158downloads
NoRedstone
1.20

NoRedstone

Disable redstone components in specific worlds

152downloads
Peaceful Silverfish
1.21.1neoforge

Peaceful Silverfish

Peaceful Silverfish lets silverfish spawn from vanilla infested stone even on Peaceful. Great for Create farms and contraptions, but works perfect in vanilla too. Includes an option to mute silverfish sounds so your base stays quiet.

151downloads
Hot Redstone Wires
1.21.5fabric

Hot Redstone Wires

Wires get hot! Makes redstone dust and blocks painful to step on.

150downloads
Skybound Chronicles
1.21.1neoforge

Skybound Chronicles

A private modpack for me and my friends, built around Create and Create: Aeronautics at its core — featuring airships, mechanical contraptions, and a handpicked selection of mods for an immersive experience.

149downloads
Sculk Eye
1.21.11fabric

Sculk Eye

Adds a new Sculk Eye Block - scans entities of a given type in a given radius and emits redstone signal based on the count

147downloads
Biznesmod
1.21.8fabric

Biznesmod

This mod adds new biomes, a new villager proffesion, new mechanics (upgradable abilities, collecting iron dust to make iron ingots, etc...), new custom structures (10+), a TNT cannon which shoots tnt where you look and some new redstone components.

129downloads
Create:SoftMotion
1.21.1neoforge

Create:SoftMotion

This mod is a client-side accessibility addon that slows down the visual rotation of Create machinery and contraptions for players with visual hypersensitivity.

128downloads
Redstone Lamp  Link
1.21

Redstone Lamp Link

A Plugin to Control a Redstone Lamp with a Button without a Redstone Wire

118downloads
Create ReLinked
1.21.1neoforge

Create ReLinked

A simple mod that allows Create redstone links to differentiate based not only on dye (for leather items), but also on renamed items.

117downloads