OwlCAD
Spare Matter Corp v1.0.0
Parametric CAD for 3D printing
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Description
From the marketplace listing
OwlCAD is a browser-based parametric CAD editor built for 3D printing. With this plugin, ChatGPT can create and edit real OwlCAD projects for you: combine shapes with booleans, use built-in generators for gears, threads and Gridfinity storage, insert datasheet-dimensioned library parts, and set every dimension in millimetres. Before calling a part done, ChatGPT can check it: confirm it builds as a watertight solid, measure its size and volume, look for overhangs and thin walls, test whether parts collide, and see whether it fits a specific printer's bed, then cut it into pieces if it does not. Results stay editable. Every model is a tree of named, dimensioned parts rather than a frozen mesh, so you can open the project in the OwlCAD editor and change any value afterwards. Export STL, 3MF or OBJ for your slicer, STEP for other CAD tools, or a 2D drawing. Who it is for: makers, students, teachers and engineers who want printable parts from a description. Limitations: OwlCAD models solid parts. It does not generate images or sculpted organic shapes through this plugin, and it cannot open native files from other CAD programs; it imports STL, OBJ, 3MF and DXF. You need an existing OwlCAD Pro account, and ChatGPT asks you to sign in to OwlCAD the first time you use it.
Language: English · Automatically detected from descriptions.
Competitor profile
From the developer’s listing and package; capabilities are not independently tested. Package observed Nov 2, 2026.
Declared capabilities
- Create parametric 3D parts with millimetre dimensions
- Check printability: overhangs, thin walls and bed fit
- Check assemblies for colliding parts
Declared limitations
- A picture request, not a CAD request. OwlCAD should not be called; ChatGPT should answer without the plugin.
- General buying advice that needs no CAD tool. OwlCAD should not be called.
- OwlCAD cannot open native files from other CAD programs. The plugin should not be called with the file; ChatGPT should explain that OwlCAD imports STL, OBJ, 3MF and DXF and suggest exporting one of those.
Review scenarios; not an exhaustive list.
Cost & access
Nothing is sold in ChatGPT. The plugin signs in to an existing OwlCAD account, and its tools neither show plans nor start a purchase.
Terms may have changed since this observation.
Starter prompt
Design a 60 mm wall hook with two screw holes and check that it prints
Keywords
Files & skills
File archives
Release notes
First release: 29 tools to build, check, export, edit and organise OwlCAD projects from ChatGPT.
Declared in the saved package. Remote tools may change independently.
Package details
Publisher declarations from the archived package. These are separate from our research and the live service's terms.
- Package author
- Spare Matter Corp
- Keywords
- See keywords
- Declared availability
- No country restrictions declaredDeclared regions; live availability may differ.
- Commerce declaration
- Does not support commerceThis does not establish whether access is free or paid.
- Review scenarios
- 5 positive · 3 negativeScenario counts, not test results.
Declared capabilities
- Create parametric 3D parts with millimetre dimensions
- Check printability: overhangs, thin walls and bed fit
- Check assemblies for colliding parts
- Export STL, 3MF, OBJ, STEP and 2D drawings
- Edit, organise and share saved OwlCAD projects
Package observed Nov 2, 2026.
Technical details
- First seen
- Oct 28, 2026 · 18:00 UTC
- Last seen
- Nov 3, 2026 · 12:00 UTC
- Collection status
- Collected
plugin_asdk_app_6ac95358c2e88191b1614e05a19ead85
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