Skip the boring parts.
Design what makes yours unique.
Drop in the standard parts — holes, inserts, hinges, textures — from a library of SmartObjects, and spend your time on what's actually yours. A real parametric CAD, right in your browser.
News, releases & deep dives
Release notes, engineering write-ups and field notes from the Kapy team.
KapyCAD 1.0 is now in public beta
A parametric CAD for 3D printing, entirely in your browser. Version 1.0 is live — try it free.
Read the postNaming faces is hard: stable topological references
Why a fillet on a boolean can break a reference, and how KapyCAD keeps it alive across a regen.
EngineeringJun 18, 2026How we solve your sketches: the 2D constraint solver
What a constraint solver is, and how it turns "these sides are equal" into geometry that adjusts itself.
EngineeringJun 16, 2026A B-Rep CAD in the browser: OpenCascade, WASM and two WebWorkers
How KapyCAD runs a real CAD kernel inside a tab, without freezing the interface.
Sharpen your craft
Guides on driving the editor, tolerances and designing for 3D printing.
Designing for FDM
How molten plastic actually stacks up — orientation, overhangs and the wall-and-infill choices that decide whether a part prints clean.
Tolerances and fits
Clearance, transition and interference fits, and the real-world gaps that make printed parts slot together.
Strength and structure
Where FDM parts break and how to stop them — layer adhesion, ribs, living hinges and shedding weight without losing stiffness.
Threads, fasteners and hardware
Threads, heat-set inserts, captive nuts and snap-fits: joining printed parts to hardware that actually holds.
Newest in the library
Freshly published parametric parts, ready to drop into a model.
Your next part is already half-designed.
Start from a SmartObject, constrain to function, and ship. No installs, runs in the browser.