Paid

Prompt2CAD

Describe a functional part in plain words and get a dimensioned CAD model to print

Prompt2CAD is a paid browser tool for functional printed parts described in plain words with exact measurements. Free trial: up to 160 credits on Google sign-in (a new model is typically about 100, an update about 50), PNG export only. STL, 3MF and the other 3D exports unlock for good after your first top-up, from $10 for 1,000 credits; $25 or more adds 10 to 20% bonus credits. Credits expire after 3 months. No subscription. Exports STL, 3MF, STEP, OBJ and GLB. Last checked 26 September 2026.

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Opens prompt2cad.com

At a glance

Price: Free trial: up to 160 credits on Google sign-in (a new model is typically about 100, an update about 50), PNG export only. STL, 3MF and the other 3D exports unlock for good after your first top-up, from $10 for 1,000 credits; $25 or more adds 10 to 20% bonus credits. Credits expire after 3 months. No subscription.
Runs on: Browser
Exports: STL, 3MF, STEP, OBJ, GLB
Multicolor: No, single color
Account: Required to download
Open source: No
Skill level: Easy: a few settings to tune
Best for: Functional printed parts described in plain words with exact measurements
Selling prints: Allowed Terms section 5: you keep full ownership of the designs and files you export and Prompt2CAD claims no IP rights; checking third-party IP and safety before selling is up to you.
How we checked: Read the tool page and docs App lobby loads with Direct prompt and Guided setup but both need Google sign-in; docs list 160 trial credits and lock STL/3MF until a first $10 top-up
Last checked: 26 September 2026

Open generator

Sources: Prompt2CAD top-up prices, Prompt2CAD export formats, Prompt2CAD terms of service (checked 26 September 2026)

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What is Prompt2CAD?

Prompt2CAD is a pay-as-you-go browser app from a two-person Lisbon team that turns a written brief into a dimensioned CAD model you can export for printing. You describe the object and its measurements, paste a photo or sketch, or open an existing STL, OBJ or GLB file. An AI agent built on Google Gemini plans the part, builds the geometry and checks its own work from several angles. You then adjust it with the sliders and switches it creates, which cost no credits, or by typing requests such as making a slot 1 mm wider.

For 3D printing there is a guided setup that asks what the part has to fit, hold or mount, aimed at brackets, drill jigs, replacement knobs, cable clips and electronics enclosures. Exports include STL and 3MF for your slicer, plus STEP, OBJ, GLB and DXF for other CAD software. The main focus is furniture and built-ins, and it is not made for figures or sculptures.

It suits printer owners who know the measurements they need but not a CAD program. The catch is cost: trial credits let you design and save PNG images, but every 3D download stays locked until your first top-up of at least $10. Use the 3MF, which is in millimeters; the STL is written in meters.

What you can make

Wall brackets and mounts
Drill guides and workshop jigs
Replacement knobs and cable clips
Electronics enclosures with lids
Organizers and small furniture parts

How to use Prompt2CAD

Sign in with Google at prompt2cad.com and open the app
Choose Guided setup or describe the part with its measurements, adding a photo if you have one
Check the dimensions, then move the sliders or ask for changes in the chat
Top up at least $10 once to unlock exports, then download the 3MF or STL and slice it

What you'll need to print it

Filament and parts that suit what you make with Prompt2CAD.

Matte PLA

PETG

M3 screws

Bambu Lab Fastener Kit Bambu Lab
Hilitchi M3 socket head cap screw assortment kit (affiliate link) Amazon

Also handy

Digital calipers

Some of these are affiliate links: we may earn a small commission, at no extra cost to you. More about that

Prompt2CAD pros

Builds real dimensioned geometry you can check by clicking each part, not a sculpted mesh
Guided setup asks about fit, holes, clearances and wall thickness before it generates
Exports 3MF in millimeters for the slicer and STEP for a final pass in Fusion or FreeCAD

Prompt2CAD cons

No printable download at all until you top up at least $10 once
Google sign-in is the only way in, and the trial credits cover roughly one model and one change
Built mainly for furniture, weak on organic shapes, and the docs say meshes can have open edges that need a slicer repair