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 fullLoad 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 pullA comparator to read itLoad, 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.