How to Generate Symmetrical Pixel Shapes for Minecraft Builds with MinecraftShapes.com

Updated

Open MinecraftShapes.com with JavaScript enabled, choose a shape from the generator menu, set your coordinates and dimensions, then download the result as SVG or PNG. The tool guarantees regular, symmetrical polygons, which is the main reason to use it over drawing pixel shapes by hand in an image editor. It works for flat pixel-art patterns you intend to place block by block in Minecraft; it does not import a build or output a schematic file.

Before You Start

  • JavaScript must be on. The site states plainly that the shape generator requires JavaScript. If the controls don't appear, that's the first thing to check.
  • Know your target size. Decide roughly how many blocks wide the shape should be before you start, since the coordinate and diameter fields drive everything else.
  • Expect pixel units, not block IDs. The generator produces a pixel grid; you translate that grid into blocks yourself when building.

Step 1: Pick a Shape

The shape selector covers:

  • Line (A to B)
  • Equilateral Triangle
  • Quadrilateral
  • Pentagon, Hexagon, Septagon, Octagon, Nonagon, Decagon, Dodecagon
  • "More sides…" for anything beyond that
  • Circle (Ellipse)
  • Angle

For a Minecraft build, the practical choices are usually the triangle, pentagon, hexagon, octagon, and circle. The higher-sided polygons are available, but see the circle caveat below before committing to one.

Step 2: Set Coordinates and Dimensions

The generator exposes these inputs:

Input What it controls
Start coords (x, y) One anchor point of the shape
End coords (x, y) The opposite anchor point
Sides Number of sides for the polygon
Top width Width at the top of the shape
Diameter Overall size for circles/ellipses
Height Vertical extent
Skew Slant of the shape
Angle Rotation
Rotation Orientation of the shape
2×2 centre Option to force the shape onto an even-sized centre

Set start and end coordinates first to define the bounding area, then adjust sides, diameter, or height to fit. If you need the shape centered on an even number of blocks (common for symmetric builds), use the 2×2 centre option and let the tool try to force it.

Step 3: Choose Thickness and Fill

Under Thickness you have three options:

  • Thin — a single-pixel outline
  • Thick — a heavier outline
  • Filled — a solid shape

For most Minecraft floor patterns and decorative outlines, thin or thick is what you want, because you'll be placing blocks along the outline. Filled is better for solid areas like a circular plaza or a filled banner motif.

The FAQ gives a useful trick for extra-thick outlines: either start thin and thicken until it looks right, or build several thin shapes at different radii around the same centre.

Step 4: Add Extras Like Stars

The Extras section includes stars (stellations) and radii. Stellations are star shapes made by joining the vertices of a polygon in different orders — the FAQ refers to them as the "{7/3}" style shapes. These are a quick way to get a star pattern that stays symmetrical, which is hard to do freehand.

Step 5: Check the Result and Fix Problems

Why does my shape look wonky?

The site explains that rasterized geometry is direction-dependent: which direction you draw a line changes how the pixels land. The generator enforces symmetry where you'd expect it, so a slightly odd edge is usually a rasterization artifact rather than a bug. If something looks genuinely wrong, the site invites you to get in touch.

Why does my polygon look like a circle?

Two reasons, both from the FAQ: more sides brings you closer to a circle, and shorter sides mean lower definition, so the difference becomes hard to see. If you want a visibly polygonal shape, use fewer sides or a larger overall size.

Can't I just do this in Paint?

You can try, but the site's own answer is that hand-drawing gives irregular, nonsymmetrical, or imperfect polygons. The generator's value is guaranteed regularity and symmetry.

Step 6: Read the Block Count and Coordinates

The interface includes a block count display and a "Show coords" option with crosshairs. Use these to:

  • Confirm the total number of blocks you'll need before gathering materials.
  • Track where you are in the pattern while building.
  • Mark your place: right-click or long-press a square to highlight it.

You can also copy cell coordinates and use the arrow keys to move around the grid, plus a permalink option to save and share a specific shape configuration.

Step 7: Download and Build

Download options are SVG, PNG, and pixels. For Minecraft work:

  • PNG or pixels is the practical choice — you get a grid you can count against while placing blocks.
  • SVG is useful if you want to scale the shape or bring it into another design tool first.

Once downloaded, build from the grid: place blocks row by row, using the block count to plan materials and the coordinates to keep your placement aligned.

Quick Reference: Common Tasks

Goal Setting to use
Circular tower footprint Circle (Ellipse), set diameter, thin outline
Octagonal room floor Octagon, set height and top width, filled or thick
Star decoration Polygon in Extras, pick a stellation
Symmetric even-width shape Enable 2×2 centre
Outline only Thickness: thin or thick
Solid area Thickness: filled

Limitations to Know

  • The generator covers all regular polygons, so if a shape isn't listed, it likely isn't a regular polygon — the FAQ says as much.
  • Feature requests go by email, and the developer notes updates aren't immediate.
  • The tool is donation-supported; there's no indication of paid tiers or login requirements in the site's own text, so treat access as it appears rather than assuming any account setup.
  • You can submit build pictures to the gallery by sending the image and your build's name.