Pixel Circle Generator

This geometric utility creates precise pixelated circle templates for block-based building games like Minecraft, Terraria, and Stardew Valley, or for digital pixel art creation. Since grids cannot represent true curves, the tool calculates the optimal block placement to approximate circles of any given diameter using rasterization algorithms similar to Bresenham's circle algorithm, ensuring symmetry and visual smoothness.

Users specify the desired diameter in blocks/pixels and receive an immediate visual grid showing exactly where to place blocks. Features include adjustable diameters (from small 5-block circles to massive 128-block arenas), toggleable grid lines for easy counting, and outline vs. filled mode visualization. The interface renders the pattern as a high-contrast guide, often highlighting the pixel count for each segment of the arc to simplify the building process (e.g., "place 5, then 3, then 2...").

Common applications include planning castle towers, circular arenas, domes, and lighthouses in survival games where trial-and-error building is resource-intensive and dangerous. Digital artists use it to generate base outlines for sprites or retro-style graphics. The tool allows downloading the generated template as an image file for second-screen reference while playing. All calculations scale instantly in the browser without server latency.