Sphere generator
A round build. One layer at a time. Java & Bedrock
Build your sphere, layer by layer
3D: drag to rotate, scroll or pinch to zoom. In Explore mode, click a block to jump to its layer.
Layer plan: the exact blocks for the selected Y level. The gold band in 3D shows this layer.
Progress: mark individual blocks or a whole layer. Green means built. Undo restores the previous state.
Keyboard: focus the plan. Page Up / Down changes layers; arrows select a cell and Enter marks it. R resets the camera.
Take this layer with you
Layer-by-layer block counts
Build from the bottom up: layer 1 is Y 0. Click a layer to select it.
Rows in this layer
In the layer plan, X runs left to right and Z runs top to bottom. All coordinates start at zero.
How to build a Minecraft sphere
Start at the bottom
Choose a diameter from 1 to 128 blocks. Hollow spheres use fewer materials; solid spheres include every interior block. Wall thickness grows inward without changing the outside dimensions.
Switch to Layer plan for exact placement. Begin at layer 1 (Y 0), then move up one layer at a time. Hollow spheres have filled caps at the bottom and top.
Keep your place
Use Mark placed for individual blocks, or Mark layer built after finishing a layer. Undo reverses the whole last action. Save project keeps your settings, selected layer and progress on this device.
Look inside your build
Full sphere shows the finished shape. Cutaway opens a quarter to reveal the interior. Up to layer hides everything above your selected height. These views do not change the required blocks or full sphere exports.
Take the plan into Minecraft
Layer PNG and SVG show only the selected layer. CSV exports preserve X, Y and Z coordinates; the complete sphere export includes the interior of solid builds. The Java .mcfunction places blocks relative to the execution position. Preview block textures come from Minecraft Java 1.21.5; the block plans also work in Bedrock.