Minecraft schematic generator: new .schem files from an image or a prompt

A schematic is a file that stores a region of blocks so it can be pasted somewhere else. The usual way to get one is to build something by hand and copy it, or to download a file from a schematic library. A Minecraft schematic generator skips both: you describe the build or show a reference image, and the file is created for you.

On Spaleforce, the AI starts from the floor plan and builds the structure, roofs, facades, furnished interiors, decor and terrain. Only real Minecraft blocks are used, with a coherent palette, and the build is assembled in stages so the export stays light. The output is one .schem you can drop into any world that runs WorldEdit or FAWE.

The .schem extension belongs to the Sponge schematic format, the one WorldEdit uses since Minecraft moved to named block states. It records the size of the region, a palette of block states and the blocks themselves. Because states are stored by name, a stair keeps its facing, a slab stays a top or bottom slab, and a lantern still hangs.

Generated files follow version 3 of that specification. The older .schematic extension comes from the MCEdit era and relies on numeric block IDs, which is why modern tools favor .schem.

Pasting a generated build takes a few commands. On a server, the workflow looks like this:

If a paste lands in the wrong place, //undo reverts it. For large builds such as a full castle with its village, FastAsyncWorldEdit is a comfortable choice.

Downloading a file blind and pasting it into a live world is how builds end up buried in a hillside. Every generated schematic opens first in a 3D viewer that uses the real Minecraft block models, so you can orbit around it, look into the rooms and check the roof from above.

The viewer also replays the construction step by step, from the floor plan to the finished scene. It is a quick way to understand the layout before choosing where the build goes.

The build generator exports .schem. It does not export .litematic directly, so if your workflow is built around Litematica, plan for that.

Our free schematic viewer opens .schem, .litematic and .schematic files in the browser without an account, which helps when you are comparing files from different sources. And if you start from a 3D model rather than an idea, our free OBJ to .schem converter turns it into a build for WorldEdit and Litematica users.

A few free tools cover the jobs the AI generator does not:

If you would rather browse first, the Spaleforce marketplace lists more than 400 published builds.