01
Plain-English design
Describe a part the way you'd explain it to a machinist. FusynCAD turns the intent into parametric JSCAD.
AI CAD · JSCAD · STL / Onshape
Describe the part.
Get a printable file.
FusynCAD turns plain-English descriptions into parametric 3D models you can preview, refine in conversation, and export. No CAD experience needed.
5 free designs · no sign-in required
L-bracket, M5 holes
ExportL-bracket for a shelf. 80 mm wide, 60 mm tall, 4 mm thick, M5 holes, with a gusset so it doesn't flex.
FusynCAD
Here's your bracket. I kept the 4 mm wall and added a 45° gusset on each end for stiffness.
Part generatedSTL ready · 4 holes
Round the cornersAdd countersinks
Ask for a change…
Part preview3DCodeSTL
80 × 40 × 60 mmdrag to orbit
Motor mountsEnclosuresBracketsGearsSpacersShaft collarsCouplingsCustom parts
Features
Built for real workflows
Everything you need to go from idea to printable geometry without leaving the browser.
02
Instant 3D preview
The model renders in your browser seconds after you ask. Orbit it, check dimensions, read the code.
03
Iterate in conversation
“Make it 5 mm taller.” “Add countersinks.” Follow-ups edit the current part instead of starting over.
04
Export anywhere
Download STL for printing, JSCAD for editing, or follow the guided steps to bring it into Onshape.
05
Sketches as input
Paste a photo or sketch, or attach an existing STL or JSCAD file as a reference for the design.
06
Projects and files
Group designs into projects, rename chats, and find every generated file in one place.
How it works
Three steps, one conversation
01
Describe
Type what you need in plain English, as detailed or as brief as you like.
Spacer, 10 mm OD, M5 hole, 12 mm long
02
Generate
FusynCAD writes parametric JSCAD and renders a 3D model in your browser.
const od = 10, id = 5.3 subtract(cylinder(od), cylinder(id))
03
Export
Download the STL, keep refining with edits, or send it to Onshape.
spacer.stlspacer.js→ Onshape