A full first-person voxel sandbox in the browser tab: infinite procedurally generated terrain with six biomes, caves and ore veins, 35 block types, a 20-minute day-night cycle, and creative flying - no install, no account, nothing uploaded.
Infinite terrain, six biomes, caves and ores, a day-night cycle, 35 block types, flying. The engine (about 0.9 MB) downloads once from this site when you press Play, then the browser caches it.
Voxel World Builder
Press Play and you are standing in an infinite procedurally generated world: walk in any direction and new land streams in, with six biomes (plains, forest, desert, snowy tundra, mountains, ocean), cave systems underground, and ore veins from coal down to diamond.
Building is first-person and creative-style: hold left click to break a block (each type has its own hardness and crack animation), right click to place, and open the block picker with E to drop any of the 35 block types into your 9-slot hotbar. Blocks are infinite, sand and gravel fall, and TNT explodes when broken. Double-tap SPACE to fly over your build.
Controls at a glance:
| Action | Key or button |
|---|---|
| Move | W A S D |
| Jump / swim up | SPACE |
| Sprint | CTRL or double-tap W |
| Sneak (edge-safe) | SHIFT |
| Fly (toggle), then up / down | Double-tap SPACE, then SPACE / SHIFT |
| Break block | Hold left click |
| Place block | Right click |
| Pick the aimed block | Middle click |
| Hotbar slot | 1-9 or mouse wheel |
| Block picker | E |
| Debug overlay | F3 |
| Pause / Options / Controls | ESC |
The world autosaves to this browser every few seconds while you play, and the same seed always rebuilds the same terrain - enter a seed on the title screen to revisit a layout you like, or leave it empty for a random one. A 20-minute day-night cycle runs overhead with sunrise tints, stars, and drifting clouds; the pause menu's Options tune render distance, field of view, mouse sensitivity, volume, and smooth lighting.
Every texture is painted procedurally and every sound is synthesized in the tab, so the one-time download is about 0.9 MB from this site and the game makes no other network calls. It plays with a keyboard and mouse - on a phone or tablet the world renders but there are no touch controls.
Weighing this against an installed sandbox game? See Voxel World Builder vs a desktop game for a side-by-side comparison.
Frequently Asked Questions
What does Voxel World Builder do?
It is a first-person voxel sandbox that runs entirely in the browser tab: infinite procedurally generated terrain with six biomes, caves, and ore veins, 35 block types on a creative picker, flying, and a 20-minute day-night cycle. Hold left click to break blocks, right click to place them.
How is my world saved?
The world autosaves to this browser every few seconds while you play and again when you quit to the title screen - closing the tab does not lose the build. The save lives in this browser's storage only, so clearing site data deletes it and it does not follow you to another device. The seed on the title screen rebuilds the same terrain anywhere, but not the blocks you placed.
How big can I build?
The terrain is infinite - new chunks generate as you walk - with a world height of 128 blocks. You choose how much renders at once with the render distance option (4 to 12 chunks) in the pause menu.
Does it work on a phone?
The page and the world render on a phone or tablet, but the game has no touch controls - moving, looking, and building need a keyboard and mouse, so a desktop or laptop is the way to actually play.