Blox Builder

BLOX

Build. Connect. Customize.

BLOX is a free 3D building game that runs directly in your browser. Place, stack, shape, and paint blocks to create whatever you can imagine — no download or installation required.

Build anything

Create structures with cubes, bricks, slopes, spheres, arches, cylinders, cones, and more. Design your own worlds on a flexible build plate, then save your creations and keep improving them.

Take on challenges

Complete main, daily, and weekly building challenges to earn XP and Bits. New challenges give you fresh ideas and goals to work toward.

Collect and customize

Unlock block and terrain skins, then paint your creations with grass, stone, brick, metal, sand, snow, wood, water, and other textures.

Join the community

Share your best builds, explore what other players have made, and find inspiration from the growing BLOX community.

FeaturesBuild anything. Customize everything. Play instantly in your browser.

Free browser-based 3D building

No download or installation

Multiple block shapes and building pieces

Daily, weekly, and main challenges

XP progression and Bits

Unlockable block and terrain skins

Save and share your creations

Community feed with likes and comments

Desktop-focused controls with fullscreen support

Best played on desktop.

Play the main game and learn more at bloxbuilder.io

BLOX is made by Universal Labs Games.