Minecraft sphere and dome generator

Width, height and depth and the block sphere is ready: a hollow shell for a planetarium, a dome for a cathedral, a bowl for a fountain. Different sizes per axis give an ellipsoid. Layers show every ring, export to .litematic and .schem.

How it works

1. Set the dimensions with the sliders — the shape is recalculated instantly and shown in 3D.
2. Pick a block (some tools take two: main and secondary).
3. Turn on Layers to see the shape slice by slice — handy for building by hand.
4. Download .litematic for Litematica or .schem for WorldEdit.

Examples

• Sphere 21
• Dome 31
• Solid ball 11

FAQ

How do I build a dome without mods?

Pick Dome, turn on Layers and lay the rings bottom to top on the grid. A hollow sphere saves blocks: empty inside, one-block wall.

How do I build this without mods?

Open the schematic in the viewer, turn on Layers and place blocks layer by layer on the grid. With Litematica or WorldEdit the schematic is pasted in one go.

Why does the shape look stepped?

Blocks are whole, so every curve turns into steps — the game does the same. An odd size gives a clean centre block, an even size gives two.

Is it free, no sign-up?

Yes. Everything is computed in the browser; the file is built locally and never uploaded.

See also: Cylinder · Minecraft builder tools