Slime Chunk Finder
Find Minecraft Java slime chunks from a world seed with a local interactive map. Supports signed 64-bit and text seeds, negative coordinates, block ranges and nearest chunk coordinates.
World & position
Java Edition only. Enter a signed 64-bit seed or the text used to create the world.
Numeric seed: 12345
Selected chunk
Regular chunk- Chunk (X, Z)
- 0, 0
- Block range
- X: 0…15
Z: 0…15 - Center (X, Z)
- 8, 8
Slime chunk map
Green: slime chunk · crosshair: your position
Click a chunk or use the arrow keys while the map is focused. North is at the top.
Nearest slime chunks in this map
Guide
How to use
- 1Enter your Java world seed and current block X/Z coordinates.
- 2Choose a map radius. Green cells are slime chunks.
- 3Select a chunk to see its block range, or copy a nearby chunk center.
Good to know
Java Edition only
The Java slime chunk algorithm uses the world seed and chunk coordinates. Bedrock uses a different algorithm and is not supported here.
Finding the seed
Use /seed with permission, or copy the numeric seed from your world settings. If you enter text, its Java String hash is used; use the numeric seed when available.
Spawn conditions
Slime chunk spawning is below Y=40. Space, mob caps, player distance and difficulty still apply; a green chunk does not guarantee an immediate spawn.
Questions
Do negative coordinates work?
Yes. Block positions are floored when converted to chunks, and the seed calculation reproduces Java integer overflow and its 48-bit random generator.