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.
Introducing Workbench: your printer's real tolerances, built into the model
A calibrated part fits the first time. Workbench keeps your printers, nozzles, quality presets and filaments in one place, walks you through guided clearance and printability calibrations, and feeds those real numbers straight into the editor — so holes, fits and features are sized for the machine you'll actually print on.
Read the postHardware: the printer and the material decide half your design
A new guide in Kapy CAD's Learn hub: printers, filaments and resins, and the real tolerances your machine imposes. 30 articles —in English and Spanish— on why the number on the datasheet is never the number you print, and how to turn your own hardware into calibrated fits.
ReleaseJul 6, 2026Designing to a standard: the new Learn guide for parts that fit what you already own
A new guide in Kapy CAD's Learn hub: Gridfinity, Skådis, LEGO, VESA, 2020 extrusion, bottle threads and IKEA. 39 articles —in English and Spanish— on the shared dimensions that let a printed part drop into an ecosystem someone already owns, and what FDM does to those tolerances.
ReleaseJun 25, 2026Learn: three in-depth guides to designing parts that actually work when printed
Kapy CAD's Learn hub is live: 139 articles —in English and Spanish— on tolerances, strength, threads and printed mechanisms, with diagrams, schematics and 3D animations of real catalog parts.
ReleaseJun 22, 2026KapyCAD 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.
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.
Your next part is already half-designed.
Start from a SmartObject, constrain to function, and ship. No installs, runs in the browser.