3D CSG Boolean Modeler

Combine, subtract, and intersect 3D shapes with a few clicks — the quickest way to create complex geometry in your browser.

What this tool does

Constructive Solid Geometry (CSG) lets you combine primitive 3D shapes using Boolean operations: Union (add), Subtract (cut), and Intersect (keep overlap only). Build complex models from simple shapes without learning CAD. Powered by BabylonJS.

Who this is for

• Makers who need custom shapes not possible with primitives alone
• Students learning Boolean modelling concepts
• Designers quickly prototyping complex geometry
• 3D printing enthusiasts creating unique objects

How to use this tool

1. Add primitive shapes (box, sphere, cylinder, cone) to the scene
2. Position them relative to each other
3. Select two shapes and apply a Boolean operation (Union / Subtract / Intersect)
4. Repeat to build complexity, then export

Inputs

• Primitive shapes — Box, sphere, cylinder, torus, cone
• Position & scale — Move and size each shape precisely
• Boolean operation — Union, Subtract, or Intersect

Outputs

• OBJ — Import into Blender or any 3D tool
• GLB — Share or embed in web viewers

Example use cases

• Hollow sphere — Subtract a smaller sphere from a larger one to create a shell
• Keyed box — Cut a rectangular hole from a box for a sliding lid
• Custom bracket — Union cylinders and boxes to form a mounting bracket
• Ring — Subtract a cylinder from a torus to create a clean ring cross-section

Related tools

• 3D Revolve Shape Modeler
• 3D Mould Builder
• 3D Hinge Customizer
• SVG to 3D Converter

Frequently asked questions