AI Model Generator for 3D Printing STL and 3MF, free

Describe the part you want to print, with millimetre sizes, wall thickness and hole diameters. The AI builds it as a solid, checks it from six views and opens it at real size, ready to export as STL or 3MF.

Free. Use your own Anthropic or OpenAI key.

Also from Innerscene: Circadian Lab, a free lighting calculator for room illuminance, melanopic EML, and glare.

Need flat parts for a laser, Cricut or CNC router? The same AI also makes cut files as SVG and DXF, checked for the kerf.

Watch how it works

How it works

  1. 1. Describe it or add a photoType what you want in plain words, with sizes if you know them, or add a photo as a reference. Describe an object or a person.
  2. 2. The AI builds and checks itThe AI writes an OpenSCAD program for an object, or sets up the character generator for a person. It looks at six rendered views of the result and fixes what is wrong, up to five builds per message.
  3. 3. Refine and exportThe model opens in the viewer at real size. Ask for changes in the chat, move the sliders, then download it or pick a format from the Export menu.

Why make it with AI here

  • Solid OpenSCAD geometry gives watertight meshes that slice cleanly.
  • You can ask for print-friendly design, like flat bottoms, 45 degree chamfers on overhangs and 0.2 mm clearances.
  • Parameters stay as sliders, so you can tweak a fit after a test print.

Prompts to try

Click one to open it in the AI panel, then change the sizes to suit.

Sending it to the printer

  1. Export STL (single colour) or 3MF (with colours and units).
  2. Open it in your slicer: Cura, PrusaSlicer, Bambu Studio or OrcaSlicer.
  3. Check orientation, supports and layer height, then slice.

STL is in millimetres with no colour. 3MF keeps colours for multi-material printers.

Best export formats: STL, 3MF

Open 3D Printing files in the free 3D Printing viewer

Good to know

It does not run print simulation or check overhangs and supports for you. Miniatures and sculpted figures are rough.

Cost and privacy

You use your own Anthropic or OpenAI API key. It is stored only in your browser and sent only to that provider, which bills you directly: a model typically costs $0.05 to $0.30 at Standard quality and up to about $1 at Detailed, and Innerscene charges nothing. Your key and prompts are not sent to Innerscene; we record anonymous usage statistics such as the steps used, the model chosen, token counts, a cost estimate and whether a model was made.

How to get an Anthropic or OpenAI API key

Read the full guide: API keys, refining and exporting

Questions

▶Can AI design 3D printable parts?
Yes. Describe the part with sizes, and the AI builds a solid model you can export as STL or 3MF.
▶How do I get a good fit?
Give the AI the clearance you want, like 0.2 mm, and adjust it with the sliders after a test print.
▶Can it make threads?
It can model simple threads on request, but printed threads under M6 are often better replaced by heat-set inserts or nuts.
▶Can I share my design with others?
Yes. Download the .scad or STL, or submit it to the Free Parts Library for review.

What it can make

Floor plans and layouts

Molecules, proteins and crystals

Make a model for any format

Make a model for your app

More ways to use it

AI Generator