Kubz.io — Free Multiplayer Voxel Sandbox

The core loop

Start with your fists: punch wood to collect logs, craft them into planks, and build your first pickaxe. From there it's a ladder — mine stone to make stone tools, then dig for iron, gold and diamond to craft the best gear in the game.

Desktop controls

Move: WASD
Look: Mouse
Jump / swim up: Space
Sprint / descend: Shift
Mine / attack: Left-click (hold to break blocks)
Place block: Right-click
Hotbar: keys 1–9
Menus: Q crafting · B shop · G rewards · K skins · O settings

Mobile controls

Move: left on-screen joystick
Look: drag on the right side of the screen
Actions: on-screen buttons to jump, dive and place — hold to break

Pro tips

Match the pickaxe to the ore: you need the right tier to mine tougher blocks — wood, then stone, then iron.
Farm mobs for coins: save them for land protectors and bulk blocks in the shop.
Claim your land: place a protector so other players can't grief your build.
Keep eating: food restores health, so stay stocked before a big fight.

Kubz.io is a free-to-play multiplayer voxel sandbox that turns the classic mine-and-build loop into a shared online adventure. Drop into a blocky world, punch trees for your first planks, and work your way up to a full arsenal of tools, weapons and armor — all without a single download.

What makes Kubz.io stand out is choice. Play a private offline world at your own pace, invite friends into a co-op realm, or jump into busy public servers where mobs roam and PvP breaks out over the best loot. Every ore tier you unlock — stone, iron, gold, diamond — opens up tougher mining, stronger gear and bigger builds. Fight monsters for coins, spend them in the shop, and stake a claim on land that's yours to keep.

Whether you want to raise a fortress, grind for diamond armor or just show off a custom skin, Kubz.io runs straight in your browser on desktop and mobile.

Full voxel crafting ladder — go from wooden tools all the way to diamond gear, weapons and armor.
Play your way: solo offline, a private co-op world for friends, public shared servers, or free-build Sandbox mode.
Real-time multiplayer with mob combat and PvP on shared worlds.
Coin economy — defeat mobs to earn coins and spend them in the in-game shop.
Land claiming with protectors so nobody can grief your builds.
Custom skins to personalize your character and stand out in public worlds.
Runs right in the browser on desktop and mobile — no download or install.

Kubz.io — first-person view holding a stone pickaxe in a blocky forest, ready to mine and gather wood.

Kubz.io — a player wields a glowing diamond sword next to another character in a snowy voxel forest.

Kubz.io — mining a vein of copper ore blocks in a snow biome, with the health and hotbar HUD on screen.

Kubz.io — a wide overview of the green voxel landscape with rolling hills and a mountain to explore.

Kubz.io — swinging a diamond sword through a lush forest of trees and cherry blossoms at the edge of the snow.

Is Kubz.io free to play?

Yes. Kubz.io runs free in your browser with no download or install. There are optional in-app purchases, but the full mine-craft-survive loop is available to every player.

Can I play Kubz.io with friends?

Absolutely. Open a "My World" private world and invite friends for co-op, or join public "Shared" servers to play alongside — and against — other players in real time.

How do I mine iron and diamond?

You need the right pickaxe tier. Start with a wooden pickaxe for stone, craft a stone pickaxe to reach iron, and keep upgrading. Each tier unlocks the next ore, all the way up to diamond.

How do I protect my base from other players?

Earn coins from mobs and buy a land protector in the shop. Placing it claims and locks your area so other players can't break or grief your build.

Does Kubz.io work on mobile?

Yes. It's fully playable on phones and tablets with touch controls — a left joystick to move, drag-to-look on the right, plus on-screen buttons for jumping, diving and placing blocks.