Minecraft Flat World Generator
AlaCraft Flat World Generator — 67 blocks, 60+ biomes, Modern and Legacy format simultaneously
AlaCraft Flat World Generator builds custom Minecraft superflat presets with 67 supported blocks across stacked layers and 60+ vanilla biomes — from Plains and Desert to Mushroom Fields and Deep Dark. Set per-layer block and height, attach features and structures, then copy the Modern preset string (Minecraft 1.16+) and Legacy preset (1.15 and below) at the same time for creative builds, redstone testing or server superflat configs.
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The flat world generator builds a superflat preset — the world where instead of mountains and caves you get a level surface made of the layers you define.
Every layer is a block plus its thickness. There is plenty to pick from: the library holds over two hundred blocks, and you set the stacking order yourself, bottom to top.
Then choose the biome — Plains, Desert, Mushroom Fields, Deep Dark and dozens more. The biome decides the grass colour, the weather and which mobs spawn in your flat world.
The finished string comes out in two formats at once, modern and legacy. The difference matters: current Java reads only the layers from a preset, while villages, mineshafts and strongholds go in through the legacy format alone. Copy the one that fits your version and paste it when creating the world.