Minecraft Superflat Generator

A superflat world is built from a list of layers, bottom to top. Each layer has a block and a thickness. The first layer sits at the bottom of the world, at Y -64 in current versions, and the last layer is the surface. Everything above the last layer is air. A world has room for 384 blocks (Y -64 to 319), so the total thickness of your layers cannot be larger than that.

These are our own presets. Change any layer after you load one.

Java Edition reads the flat world from the generator-settings line in server.properties. The generator writes that JSON for you, including the biome, the Features and Lakes switches and the structure sets (villages, strongholds and so on). Bedrock Edition stores a list of block layers and a numeric biome id instead, and has no structure toggles in the flat world data. Pick the edition at the top and copy the matching output.

We started the official Java 26.3 server with the generated settings and tested every layer with /execute if block, then checked the biome and the air above the top layer: 9 of 9 checks passed. For Bedrock we put the generated layer data into a flat world on the official Bedrock Dedicated Server and tested every block with /testforblock: 8 of 8 passed. The numeric Bedrock biome ids are the long-standing ids; we did not test the biome on the Bedrock server.

Keep bedrock as layer 1 unless you want a void world, because without it players can fall out of the world. Turn Features off for a perfectly clean surface, and Lakes off to stop water pools in the grass. For a village start, keep the Villages structure on and use a plains or desert biome. Delete the old world folder before you start the server with new settings, because the generator only runs when the world is created.