Kubik

A 3D modeller that runs in your phone's browser. No install, no account — tap the link and start modelling.

Kubik is a low-poly mesh editor that runs in a browser tab, on a phone or on a desktop. It's built to be used one-handed — you drag with a thumb, and the tools bloom wherever it's touching. It's a general-purpose modeller: nothing in it assumes what you're making.

Nothing to install, no account, no sign-up. Open it and push a cube around.

Try it →

Scan with a phone camera — it's built for one, so that's the way to see it properly. Then Share → Add to Home Screen for fullscreen.

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What it's like

There is no gizmo. You grab what's selected and drag it. No arrows to hunt for, no handle to miss on a small screen.

Nothing is on screen that doesn't need to be. Press and hold, and the tools that apply right now appear around your finger. Lift, and they're gone.

It shows you what a tap will pick before you lift. The vertex, edge or face under your finger lights up the moment you touch, so a near miss is fixed before it happens.

Underneath that it's a real modelling app:

• object, vertex, edge and face selection, with box and lasso;
• extrude, inset, bevel, bridge, loop cuts, knife, subdivide, solidify, array, symmetry and mirroring;
• booleans that let you choose the faces along the cut (n-gons, triangles, quads, or the body's own edge loops);
• curves you can turn into tubes or spin into lathed shapes;
• materials with masks, and UV seams, unwrapping and a 2D UV view;
• an outliner with groups, undo, saves that stay in the app, and export to glTF, OBJ or STL. Bring in .glb, .obj, .stl or .fbx.

There's a Help card in the app: open the menu and tap Gestures and tools. It covers every gesture, every ring and every tool.

Running it

It's one self-contained HTML file. Serve it from anywhere:

python -m http.server 8000   # then open http://localhost:8000

It won't work opened straight from disk as a file:// URL — it loads three.js as an ES module, and browsers block module imports from local files. GitHub Pages, Netlify and itch.io all serve it as-is.

Add ?debug=1 for an on-screen console and diagnostics.

Built with

three.js via CDN. No build step, no bundler, no dependencies to install.

If you want to work on it, read CURRENT_STATE.md first — it describes the app as it stands, and lists several obvious-sounding features that were built, tried and deliberately removed.

Licence

See LICENSE.