About JustBuild

Build at your own pace

JustBuild.World is a single-player voxel sandbox. Sandbox Mode gives you a block picker, flight and undo so you can work on houses, paths, towers or a landscape of your own. There is no download, account or live multiplayer.

Your world stays with your browser

The game generates terrain from a seed and saves your changes on your device. A world code lets you keep a backup or give someone their own copy. See how saves and world codes work.

Independent work

JustBuild uses its own generated artwork, block names and interface. It is an independent project. Features and browser support continue to evolve; the help page describes the current controls and limitations.

Contact

Send questions, bug reports or feedback to contact@justbuild.world. Include your browser and device, what happened and what you expected. Keep private world codes out of an initial report.