ChunkMapsseed tools

🟫 Superflat preset generator

Build a custom flat world layer by layer, then copy the preset string into Minecraft when you create a new world. Everything happens in your browser.

Start from
Layers (top to bottom)

    Structures and features are not part of the preset code (removed in 1.16). Enable “Generate Structures” in the world options; which ones appear still depends on the selected preset and biome.

    How to use it

    1. Design your layers above and copy the preset.
    2. In Minecraft: Create New World → More World Options.
    3. Set World Type: Superflat, then click Customize.
    4. Paste the string into the preset box and click Use Preset.

    FAQ

    How do I use a superflat preset?

    Copy the preset string, then in Minecraft create a new world, choose World Type: Superflat, click Customize, and paste the preset into the box.

    Where do I paste the preset in-game?

    Create New World → More World Options → World Type: Superflat → Customize → paste into the preset field → Use Preset.

    Does this work on Bedrock?

    The preset format is Java edition. Bedrock uses a different flat-world UI, so the string will not paste directly.