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Minecraft Java 1.21 Mods

Browse 33 free mods for Minecraft Java 1.21 — popular picks include Redstone Sound Slider, Industrial Heavy Metal Thunder, Gauges, Switches & Modules.

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Redstone Sound Slider
1.21.11fabric

Redstone Sound Slider

Adjust your piston / dispenser / trapdoor / buildstone volume separately from other blocks.

55kdownloads
Industrial Heavy Metal Thunder
1.20.1forge

Industrial Heavy Metal Thunder

10+ Decorative metal block palettes

55kdownloads
Gauges, Switches & Modules
1.21neoforge

Gauges, Switches & Modules

An unofficial NeoForge/Fabric port of the classic RsGauges mod. Adds stylish analog/digital gauges, switches, and sensors for redstone monitoring. And new Blocks/Items.

22kdownloads
Crossroads
1.21neoforge

Crossroads

A tech mod with the goal of making automation interesting. No one block solutions, just simple pieces that combine to make complex contraptions. Crossroads is a mod where you make Rube Goldberg machines, except they're the simplest way to do things.

7.6kdownloads
Redstone Lantern
1.21.11fabric

Redstone Lantern

A mod that adds a Redstone Lantern as both a decorative block and redstone component

6.5kdownloads
Laseredstone
1.21.8fabric

Laseredstone

Redstone but we use lasers to transfer signals

4.6kdownloads
Spark Scatter
1.21.1

Spark Scatter

Redstone components release brief particle bursts when activated, creating visual feedback across the server.

4.1kdownloads
Create: Lights & Controls
1.21.1neoforge

Create: Lights & Controls

More lights and wireless redstone switches that plug straight into Create's Redstone Link network

3.2kdownloads
PowerStones
1.21.11neoforge

PowerStones

Overlapping wires of Redstone, Bluestone, Greenstone and Yellowstone

3.1kdownloads
SG Tracks
1.21.1neoforge

SG Tracks

SG Tracks adds tracks that work like regular wheels for Create Aeronautics. You don't need any extra mounting blocks — just place the tracks directly on your machine and build your contraption.

2.8kdownloads
Hendrix's Better Copper Age
1.21.11fabric

Hendrix's Better Copper Age

Make Copper Golems interact with Copper Buttons, like originally intended, and boost your builds with new decorative blocks!

1.6kdownloads
Quantum's Lamps
1.21.4neoforge

Quantum's Lamps

Alphabetical, Numerical, and Punctuation Redstone Lamps.

1.5kdownloads
Create: Tow & Haul
1.21.1neoforge

Create: Tow & Haul

Towing gear for Create physics vehicles: a redstone winch that reels a real steel rope, tow bars to hook it to, and a coupling that joins two tow bars with a rigid drawbar so you can actually pull a trailer. For Create: Aeronautics / Simulated.

1.4kdownloads
Create: Easy Redstone Links
1.16.5

Create: Easy Redstone Links

Adds a signal reception indicator to the upper side of the receiver from Create Mod

1.3kdownloads
Proximity Lamp
1.21.9

Proximity Lamp

Adds 4 light modes: proximity, nocturnal, permanent and proximity-nocturnal. Works with redstone_lamp, candles, copper_bulbs and campfires.

1.2kdownloads
Create: Restone (link) Funktions and Colored Pixels
1.21.1neoforge

Create: Restone (link) Funktions and Colored Pixels

RedstF extends Create with new Redstone Link mechanics: programmable functions, more frequencies, and RGB displays.

1.2kdownloads
Neon Light
1.21.1neoforge

Neon Light

A simple mod that adds a singular block featuring 17 color variants, the Neon Sign! A glowing modular block suitable for large sign creation and displaying both letters and symbols in large glowing letters. Decorate your builds or server with custom signs!

598downloads
Create: Red Button
1.21.1neoforge

Create: Red Button

Adds a wireless Redstone button that can be used in the world and linked to Redstone Links.

543downloads
The Secret of Minecraft(The Secret of the Mimic mod)
1.21.1fabric

The Secret of Minecraft(The Secret of the Mimic mod)

Adds a mechanic to the Iron Door, so that when you place an emerald block next to it, it becomes permanently blocked, preventing any redstone signals from reaching the door. And how can I open it? With the Data Diver! This is your master key, allowing you

467downloads
Cobalt of Imagination
1.21.8neoforge

Cobalt of Imagination

Push and pull blocks with redstone. Cobalt Imagination comes with a whole variety of blocks and items.

367downloads
Dice-Blocks by Limo4317
1.21.1neoforge

Dice-Blocks by Limo4317

There are just blocks here, one for each of the numbers 1 to 6. And then you can simply build a dice machine with a redstone mechanism.

345downloads
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
RGBCraft
1.21.1neoforge

RGBCraft

Programmable RGB strips, panels, controllers and networks for NeoForge, with animated effects, redstone control, CC:Tweaked support and optional colored lighting.

94downloads
rtx 5090 mod
1.21.8neoforge

rtx 5090 mod

This mod adds a decorative model of the RTX 5090 graphics card. It is crafted from a diamond, 4 pieces of iron, 2 green dyes, redstone, and a stone button.

90downloads
POWERED
1.21.1fabric

POWERED

Revamps automation. Adds a ton of configurable & polished redstone components, allowing you to do more than ever before.

81downloads
Structure-technique-redstone
1.21.4neoforge

Structure-technique-redstone

A mod for learning and viewing redstone systems like a portal, furnace, iron factory, etc.

61downloads
RedStoneSpread
1.16

RedStoneSpread

RedstoneSpread is a Bukkit plugin that generates organic, terrain-adapting block veins with customizable spread patterns and physics.

52downloads
Craftable Creakings
1.21.4

Craftable Creakings

This simple data pack allows one to craft a creaking egg in survival! Now you can build redstone machines that activate simply by looking at a creaking that doesn't despawn! (The creaking will not despawn if named)

32downloads
Create: Bells & Whistles Mod (1.21.1, 1.20.1) – 36 New Additions
1.21.1neoforge

Create: Bells & Whistles Mod (1.21.1, 1.20.1) – 36 New Additions

Create: Bells & Whistles Mod is an add-on for the Create mod that focuses on the player experience, adding over 36 new decorative and utility blocks specifically suited for Create builds and contraptions. Features: Train Pilot Blocks Ornate Iron Trapdoor Headlight Station platform block Metro Palette of Blocks Andesite, Brass, and Copper Grab Bar Blocks […]

Immersive Engineer Decor&Controls&Tool Reforged
1.21.1neoforge

Immersive Engineer Decor&Controls&Tool Reforged

⚙️ Industrial decor, workshop machines, storage fittings, and redstone control blocks for NeoForge factory builds.

2.3kdownloads
Create Automatics Mod (1.21.1) – Build Self-Driving Contraptions
1.21.1

Create Automatics Mod (1.21.1) – Build Self-Driving Contraptions

Create Automatics Mod adds autopilot systems for Create and Sable contraptions. This mod lets you plot custom driving routes, set movement speeds, and command assembled vehicles to drive themselves. You can also place decorative traffic cones on the ground, wear them as hats, or shoot them onto mobs using dispensers. Features: Build automated paths for […]

Create Modpack (26.2, 1.21.1) – Build Moving Machines And Fly
1.21.1

Create Modpack (26.2, 1.21.1) – Build Moving Machines And Fly

Create Modpack focuses entirely on building moving machinery and physical contraptions to explore your world. It blends vanilla-friendly decoration with a deep, mechanical power system that rewards creativity. You will need to build real, working vehicles to travel far, making every journey a true engineering project. Features: Rotational Power System: Machines run on physical energy […]