Voxel Circle Generator

How to use this tool

Set your radius with the slider — the canvas updates in real time. Choose a shape: Hollow gives you just the outline, Filled gives a solid disc, and Ring lets you set both inner and outer radii for a hollow cylinder wall.

Download the result as a PNG to use as a build reference, or copy the text pattern (█ = block, · = empty) to paste into a spreadsheet or notes app.

What is a voxel circle?

A voxel circle is an approximation of a geometric circle on a discrete integer grid. Because voxels sit at whole-number coordinates, a perfect mathematical circle can't be represented exactly — the algorithm finds the closest grid cells to the ideal circle boundary.

This tool uses the midpoint circle algorithm (Bresenham's), which exploits 8-way symmetry to trace the tightest possible approximation with no gaps or doubles. New to voxels? Read what a voxel is or browse our free voxel tools.

Used in Minecraft & voxel games

Circular builds in Minecraft — towers, arenas, lakes, dome roofs, portals — all require knowing which blocks to place at each radius. This generator removes the guesswork so you can plan material counts before you start.

For game development, use circle templates for round rooms, wheels, eyes on characters, or any radially-symmetric structure. The coordinates are centered at origin (0, 0) for easy engine import. For more on the craft, see our guide to voxel art.

How do I make a circle in Minecraft?

Pick the Hollow shape and set the radius you need, then use the on-screen pattern or downloaded PNG as a block-by-block reference. The center axes mark the origin so you can line the circle up with an existing build.

What radius should I use?

For small details (eyes, dots) try radius 3–5. Round rooms and towers usually look best at radius 8–16. Large arenas and lakes use radius 20+. The block count updates live so you can budget materials before building.

Is the voxel circle generator free?

Yes — this tool is completely free with no sign-up. For full 3D voxel models you can also try the free VoxelAI Studio editor and voxel art gallery.