Astroworld Circle & Dome Generator vs BlockBlend

Astroworld Circle & Dome Generator is a free web tool for planning Minecraft structures with pixel grids. It generates circle outlines, filled circles, domes and sphere shells from whole-block diameters between 1 and 256. The selected shape’s total block count appears before construction. Gold cells indicate blocks to place, while dark cells indicate empty space; large grids are compressed to fit the screen. A layer slider lets you inspect dome and sphere-shell builds one layer at a time. The page says block positions are calculated in your browser from the diameter entered. You can embed the generator in a website or server wiki with an iframe and set its width, height and theme. The free plan costs nothing, with no sign-up and no ads. It is intended for Minecraft builders planning towers, arenas, greenhouses, planetariums and spheres.

BlockBlend is a free browser tool for making Minecraft block palettes and geometric build blueprints. Its Circle Generator creates circles, rings, spheres, domes, and cylinders, with block counts, bounding-box information, and layer-by-layer views. Outputs include WorldEdit commands, ASCII blueprints, and JSON. The CraftLab palette library contains more than 300 blocks and can generate combinations around moods such as Medieval, Cyberpunk, Fantasy, and Oceanic. Palettes can be previewed in 3D, shared with the community, and exported as weighted WorldEdit //set commands. The Free plan is listed at free and includes unlimited palettes, all blocks, WorldEdit export, and community sharing. Image-to-palette conversion, schematic import, and map art are marked as coming soon. The privacy policy describes collection of account details and page, feature, and device usage information, as well as Google Analytics for aggregated usage analytics. Account data is retained while an account is active; deleted account data is removed within 30 days.