14 Interactive Builders · Free · No Downloads

Design in 3D.

Build rockets, robots, pirate ships, airships, race cars, submarines, castles and more , all live in your browser. Design it, colour it, export it.

Ages 8+ 100% Free Runs in Browser Three.js Powered
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Lumo's Pick

New to 3D building? Start with the Rocket Builder , 17 steps, instant launch animation. Got a 3D printer? The Phone Stand Builder exports a print-ready STL file. Every builder works right in your browser, no downloads needed.

Choose Your Builder

Pick any builder below and start creating. No account needed.

Open the 3D Builder shell (all 11 projects) →

Prefer to jump straight in? Every builder below still has its own page.

Rocket Builder , design and launch your own 3D rocket 3D Builder
🚀
Rocket Builder
Design your own launch vehicle , nosecone, body, fins, boosters, engines and more. Live 3D preview with launch animation.
Robot Builder , design a custom 3D robot 3D Builder
🤖
Robot Builder
Build a custom robot , head, torso, arms, legs, weapons and chest reactor. Stat bars, profile card, and activation animation.
Pirate Ship Shipyard , design a full 3D pirate vessel 3D Builder
🏴‍☠️
Pirate Ship Shipyard
Design a full pirate vessel , hull, masts, sails, cannons, figurehead, flags and more. Animated water and set-sail sequence.
Steampunk Airship Dockyard , design a 3D steampunk airship 3D Builder
🛩️
Steampunk Airship Dockyard
Craft a steampunk airship , hull, balloon, gondola, engines, propellers, wings and weapons. Guided mode and free-build sandbox.
Race Car Builder , design your own 3D race car 3D Builder
🏎️
Race Car Builder
Design your own race car , body style, engine, wheels, aero package, livery and exhaust. Live 3D preview with race animation.
Submarine Builder , design a 3D submarine 3D Builder
🤿
Submarine Builder
Design a submarine , hull, conning tower, periscope, propeller, torpedoes and more. 16 steps with an underwater dive animation.
Castle Builder , design a 3D medieval fortress 3D Builder
🏰
Castle Builder
Design a medieval fortress , walls, towers, gates, moat, drawbridge and more. 16 steps with torch-light atmosphere.
Space Station Builder , design a 3D orbital station 3D Builder
🛰️
Space Station Builder
Design an orbital station , modules, solar panels, docking ports, antennas and more. Earth backdrop, 16 steps.
Fairy Tale Builder , design a 3D whimsical cottage 3D Builder
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Fairy Tale Builder
Design a whimsical cottage , roof, garden, towers, lanterns and fairy lights. 16 steps with a firefly evening animation.
Phone Stand Builder , design a 3D-printable phone stand 3D Printable
📱
Phone Stand Builder
Design a 3D-printable phone stand , angle, grip, cable slot, branded text. 14 steps with STL export for your printer.
Voxel Studio , build a 3D model cube by cube Browser Studio
🧊
Voxel Studio
Stack and paint cubes on a real 3D grid, spin the model, then export an OBJ mesh and a Minecraft .mcfunction build.
3D World Builder , block out a game level Browser Studio
🧱
3D World Builder
Block out a game level , floors, walls, ramps and platforms on a grid. Export an OBJ mesh and a level.json for Godot, Unity or Blender.
TinkerCAD Mod Studio , design a 3D-print model 3D Printable
🖨️
TinkerCAD Mod Studio
Lay out a 3D model from simple shapes and download a real STL you can import into TinkerCAD or send to a 3D printer.
Blender Mod Studio , build a 3D scene script Browser Studio
🎬
Blender Mod Studio
Lay out a 3D scene , primitives, lights and cameras , and export a real Blender Python script that builds it for you.

Every Builder Includes

The same toolkit ships with every builder , no hunting for features.

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Live Stats
Your creation's stats update in real-time as you build each step
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Random Build
One click generates a completely random creation for instant inspiration
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Save & Load
Save your builds locally and reload them in any future session
📸
PNG Screenshot
Export your creation as a high-quality image to share anywhere
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3D Export
Download as OBJ, MTL or GLB for Blender, Unity or Godot
🔗
Share Links
Generate a URL that encodes your entire build , share with one link
🎨
Colour Presets
Quick livery schemes , or build your own palette with colour pickers
🃏
Profile Cards
Generate a trading-card-style image with your stats and creation
⌨️
Keyboard Shortcuts
Arrow keys, Ctrl+Z undo, F for fullscreen , build without your mouse
🏅
Badges & Progress
Earn badges as you complete builders and track your overall progress

Ready to Build?

Pick any builder above. No sign-up, no downloads , just open a tab and start creating in 3D.

🚀 Start with Rocket Builder