A free 3D block builder that runs in your browser
BLOX gives you a 3D build plate and 17 block shapes. Click to place, drag to orbit, paint anything. It loads in a browser tab, so there's nothing to install.
Play BLOX freeSee community builds →Real 3D, not a flat grid
Every block sits in true 3D space. Orbit the camera all the way around, zoom in for detail and stack as high as you want. Slopes, ramps, corners, spheres, cylinders, cones and pyramids let you build curves and roofs instead of only square boxes.
Colors and textures
Paint blocks any color or swap to textured skins: grass, wood planks, stone, brick, metal, sand, snow and water. Terrain skins change the build plate itself, so your model sits in a scene.
From quick sketch to giant world
A 12 × 12 plate is good for a quick model; 96 × 96 fits a whole village. Undo, rotate and erase are one key away.
Something to aim for
Daily and weekly challenges show a ghost outline to rebuild. Finish them to earn XP and Bits, then spend Bits on new skins.
FAQ
Is this 3D block builder free?
Yes. BLOX is free, with no ads and no paywall.
Does it work on a Chromebook?
Yes. It runs in Chrome, Edge, Firefox and Safari, including on Chromebooks.
Do I need an account?
No. You can start building as a guest. A free account saves your builds to the cloud and lets you post to the community.