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Minecraft Superflat World Generator

Design custom flat worlds — stack layers, pick a biome, and export the preset string for Java Edition.

Quick presets

World cross-section

4 / 320 blocks3 layers
Bedrock×1
Dirt×2
Grass Block×1

Layers · top first (rendered bottom-first in the preset string)

grass_block_top
dirt
bedrock

Block library

World settings

Biome

Generation

Structure overrides

Output

minecraft:bedrock,2*minecraft:dirt,minecraft:grass_block;minecraft:plains;village,decoration

Paste this into Customize → Preset when creating a Superflat world.

Import preset

How to use

  1. 1. In Minecraft, choose Create New World → More → World Type: Superflat.
  2. 2. Click Customize, then Presets, and paste the string into the bottom field.
  3. 3. Hit Use Preset and start the world.
  4. 4. For datapacks, drop the JSON into data/[namespace]/dimension/[name].json and reload.