Automation · 1.21 Crafter · Java & Bedrock

How to Use the Crafter Block

The Crafter holds a 3×3 recipe and crafts it on a redstone pulse. Load it, disable the slots you want empty, and let redstone do the crafting.

▶ REDSTONE PULSE✦ CRAFTING↓ EJECT RESULT

load the recipe in 3x3

a comparator reads it's full

Load the Crafter's grid with a recipe, toggle off any slots to keep empty, then give it a redstone pulse. It crafts one result and ejects it, ready for the next pulse.

What you need

The Crafter block

Redstone to pulse it

Hoppers to feed and pull

A comparator to read it

Load, toggle, pulse

The Crafter works in three moves. Load the recipe into its grid; toggle off any slots you want to stay empty so fed items never land there; and pulse it with redstone to craft one result. Items fed in spread evenly across the enabled slots, and a comparator can read when the grid is full so it only fires when a craft is ready.

Quick answers

What is the Crafter in Minecraft?

The Crafter is an auto-crafting block added in 1.21. It holds a 3x3 recipe like a crafting table, but instead of you clicking, a redstone pulse makes it craft one result and eject it, so redstone can finally build items on its own.

How do you use the Crafter block?

Place it, open it, and set the recipe in its 3x3 grid. Toggle off any slots you want to stay empty, feed ingredients in by hand or with a hopper, then send it a redstone pulse. Each valid pulse crafts one result and pushes it out.

How do you disable a slot in the Crafter?

Click a slot in the Crafter's screen and it shows a cross, meaning items will never be placed there. Disabling slots lets you craft recipes that do not fill all nine, and controls exactly where incoming items land.

How does the Crafter decide where items go?

Items fed in spread evenly across the enabled slots, filling the emptiest first, and skip any slot you disabled. That even spread is what keeps a fed recipe balanced so it can craft again and again.

How do you trigger the Crafter?

Any redstone pulse works: a button, a clock, an observer, or a comparator circuit. It crafts once per pulse as long as the grid forms a valid recipe, then ejects the result toward the front or into a container or hopper.

Can a comparator read the Crafter?

Yes. A comparator off a Crafter reads how full and ready its grid is, so you can wire it to only pulse when every needed slot is loaded. That makes a clean self-triggering auto-crafter.

Database →

The Crafter block

Look up the Crafter, comparators and the recipes you can automate.

Guide →

Auto crafter farm

Put the Crafter to work in a full hands-free crafting loop.

A crafting table that answers to redstone

It keeps the recipe between uses

The grid inside the crafter stays as you set it, so the block is a recipe you place once rather than a menu you open. That is the difference from a crafting table: the crafter is a machine, and the recipe is part of the build.

Disabled slots are the aiming mechanism

Any slot can be switched off so items skip it, which is how you stop a hopper filling the middle of a three by three when the recipe only wants the corners. Without disabled slots, mixed input scrambles the recipe within seconds.

A comparator tells you how full it is

The crafter reports its contents like other containers, so a circuit can wait until every needed slot has an item before firing. That is more reliable than a timer, because it never fires on a half filled grid and wastes ingredients.