TraptionLab Launch!

TraptionLab is a 2D physics sandbox where you build, wire up, and watch contraptions come to life. Drop in shapes, bolt them together with hinges, motors, pistons and springs, hit Play, and see whether your idea was a stroke of genius or about to fly apart at the seams.

Whether you're recreating a Rube Goldberg machine, sketching out a wacky vehicle, stress-testing a bridge, or just flinging stuff at things to see what happens — TraptionLab gives you a clean set of tools and a fast feedback loop. No download. Runs straight in your browser, on desktop or mobile.

What you can build with

• Shapes — rectangles, circles, triangles, custom polygons, gears, racks, chains, and a freehand pen tool for any silhouette you can draw
• Joints — fixed welds, hinges, motors, pistons, springs, ropes, thrusters, magnets, blast joints and particle emitters
• Boolean ops — union, subtract and intersect shapes to carve out exactly the part you need
• A real physics engine under the hood (planck.js / Box2D), so everything collides, balances and breaks the way you'd expect

Make it yours

• Snap to grid, round corners, offset edges, scale, rotate, recolor
• Tweak gravity, simulation speed, density, friction and restitution per body
• Add text and line overlays to label or annotate your creation

Share & compete

• Save contraptions to the cloud and load them anywhere
• Publish to the community gallery
• Set up Challenge Mode — define a build area, a target area and a target object, then dare other players to solve it

Free, with optional Pro

The core sandbox — shapes, basic joints, simulation, saving locally — is free, no signup. A free account unlocks gears and particle emitters. Pro unlocks the advanced toolkit (boolean ops, pen tool, rope, thrusters, magnets, springs, racks, blast joints, corner & offset tools, Challenge Mode authoring, and community publishing).