Propsize is a small browser 3D editor: a tray of primitives, a transform gizmo, real materials, and code emitters for Three.js, R3F and Threlte. Everything on this page was made with those parts alone.
Box, cylinder, cone, sphere, icosahedron, torus, lathe. Snap them to a half-unit grid so parts actually meet.
Name things, nest them, share one material across a whole roof. Flat shading does most of the styling for you.
Ready-to-paste Three.js, R3F or Threlte — or a scene document you can load straight back in. No runtime, no lock-in.
Hover to stop the drift and turn one yourself. Nothing here was modelled elsewhere — no meshes were imported.
Short walkthroughs — one per primitive, then one per prop in the pack. Slots are reserved below.
A demonstration piece. Propsize is a complete, working 3D editor — hierarchy, gizmos, materials, autosave, export — built to show the kind of tool I can design and ship end to end.
It is free, it needs no account, and it stays in your browser. Open it, make something, take the code with you.
Open the editor