Slime Chunk Finder

Slimes only spawn underground in certain chunks, and you cannot see those chunks in game. This slime chunk finder solves that. Enter your seed, zoom in on the map, and every slime chunk lights up on the grid. Then you can dig your slime farm in exactly the right spot. It works for Java Edition, where slime chunks depend on the seed, and for Bedrock Edition, where they do not.

How to use the slime chunk finder

1. Enter your world seed. In game, type /seed to see it in Java Edition.
2. Pick your edition and version.
3. Zoom in on the map until the chunk grid appears. Slime chunks are highlighted.
4. Hover or click a chunk to read its block coordinates.
5. Travel there and confirm the chunk borders in game.

Look for groups of slime chunks that touch. A cluster lets you build one big farm that covers several chunks at once.

How slime chunks work

About one in ten chunks is a slime chunk. In these chunks, slimes can spawn below Y 40. Light level and weather do not matter there. In Java Edition they spawn in groups of four, while Bedrock spawns them one at a time.

In Java Edition, the game decides with a formula. It mixes the world seed with the chunk X and Z. Then it seeds a random generator with that value and rolls a number from 0 to 9. If the roll is 0, the chunk is a slime chunk. Only the lowest 48 bits of the seed matter.

Bedrock Edition works differently. Its formula ignores the seed completely. Therefore, the same chunks are slime chunks in every Bedrock world.

Building a slime farm

• Dig below Y 40. Slime chunk spawning only happens under that height.
• Clear large platforms. Slimes need room, so make open floors several layers tall.
• Light up the caves around it. This stops other hostile mobs from using up spawn space.
• Stand at a safe distance. Mobs only spawn within a certain range of the player, but not right next to you.

Slimeballs make sticky pistons, leads and slime blocks. So a farm pays off fast for redstone builds.

Common slime chunk mistakes

First, check the difficulty. Slimes do not spawn in Peaceful mode, no matter where you dig.

Second, check the chunk borders. Press F3+G in Java Edition to show them. A farm that is off by one chunk catches almost nothing.

Third, use the right edition. A Java slime chunk map is useless in Bedrock, and the reverse is also true. Finally, remember that negative coordinates round down. Block X −1 sits in chunk −1, not chunk 0.

Slimes in swamps

Slime chunks are not the only source. Slimes also spawn on the surface in swamps and mangrove swamps. There they appear between Y 51 and Y 69 in low light.

The moon matters too. Swamp slimes spawn most often during a full moon and never during a new moon. Because of that, swamp farms are less steady than slime chunk farms. For a reliable supply, a slime chunk is the better choice.

Why use a slime chunk finder

Without a map, finding a slime chunk takes a lot of digging. You clear a big room below Y 40, light the caves around it and wait. If no slimes appear, you move on and try again.

A slime chunk finder skips that guesswork. You see every slime chunk around your base at once. In addition, you can pick a chunk that sits near your storage or under a spot you already plan to dig. That keeps your farm close to the rest of your builds.

FAQ