Turn practical ideas into CAD for 3D printing
Own a 3D printer but not years of CAD experience? Design brackets, jigs, organizers, enclosures, and replacement parts through guided questions and conversation.
Up to 160 trial credits where available · No credit card required
Brief → plan → model
Describe the object, dimensions, materials, and constraints. The agent turns the brief into editable CAD.
Select → ask → refine
Select the part you mean, ask for a change, and let the agent inspect the updated model.
Prompt2CAD gives 3D-printer owners a faster way to create custom functional parts without starting from a blank CAD workspace. Use guided setup, describe the part in plain language, upload a reference image, or open an existing STL, OBJ, or GLB model and continue designing it with the agent. The agent builds real, dimensioned CAD geometry rather than a decorative polygon-soup mesh. Inspect the model, click parts to review their dimensions, and revise the same design through conversation: "make the slot 1mm wider", "move the mounting holes 5mm inward", or "add a chamfer to this edge." Export 3MF or STL for slicer preparation and validation, or STEP for further tolerance, fit, and engineering work. Always check manifoldness, wall thickness, clearances, orientation, supports, and material-specific tolerances before printing.
From a brief or existing model to editable CAD
No CAD experience needed. The agent handles the modeling loop while you control the object, dimensions, and final export.
Brief the agent or open a model
Describe the object, upload a reference image, or open an existing DWG, DXF, SKP, OBJ, STL, or GLB model and continue designing from it.
The agent plans and builds
The agent asks for missing details when needed, plans the structure, and uses CAD tools to create real parametric geometry at the dimensions you specified.
Inspect and refine
The agent renders and checks its work from multiple angles. Use controls or say "make it wider" or "add a back panel" to refine the same model.
Present or hand off
Review the geometry-derived parts list, download it as CSV, or export STEP, DXF, OBJ, STL, or GLB for downstream CAD, prototyping, and production preparation.
Start with the part, not an empty CAD workspace
Choose Guided setup in a fresh project and Prompt2CAD will turn what the part must fit, hold, guide, or protect into a structured brief before generating geometry.
Choose a part family
Pick Mechanical parts, Products & enclosures, or Workshop & fabrication, then select the closest type of part.
Answer fit questions
Enter the envelope, mounting interfaces, holes, wall thickness, clearances, materials, and other dimensions you already know.
Describe unusual details
Use text fields for the hardware it must match, how it should attach, and any custom cutouts, ribs, bosses, or print constraints.
Generate, inspect, refine
Review the brief, generate the CAD model, inspect dimensions, and request fit changes before exporting for slicer validation.
How the CAD agent helps
Real CAD for practical parts
Create brackets, jigs, organizers, mounts, enclosures, and replacement parts with explicit dimensions you can inspect and revise — not a frozen decorative mesh.
Adjust fit through conversation
Ask to widen a slot, change a bore, move a hole pattern, thicken a wall, or add a chamfer. The agent updates the same design so you can check another iteration.
Inspect dimensions before export
Review the overall envelope and click individual parts to inspect their dimensions. Agent-authored controls let you tune key values when the model exposes them.
Start from an image or existing model
Paste a photo or dimensioned drawing, or open an STL, OBJ, or GLB model as a Prompt2CAD project. Build from the visible dimensions and features, or continue modifying and extending the imported geometry through conversation.
3MF, STL, and STEP handoff
Export 3MF or STL for preparation and validation in your slicer. Export STEP when you want to continue tolerance, fit, or engineering work in Fusion, FreeCAD, or SOLIDWORKS.
Built for makers and engineers
From DIY builders and product designers to mechanical engineers, people are using Prompt2CAD to design and iterate on real projects.
"I spent weeks trying other AI and modeling tools for built-in storage in oddly shaped rooms. Prompt2CAD was the first that gave me a precise design I could verify and build from, without needing a CAD background."
DIY home renovator, United States
"I designed a custom L-shaped walk-in closet, 240 by 140 cm, with oak panels, hanging sections, drawers, and recessed lighting. I described the layout in detail and refined the proportions as I went. Saved me a long session in modeling software."
Furniture designer, East Asia
"I needed a custom planter for a terrace with an unusual stepped floor, so the base had to follow an L-shape. I described the geometry, refined a few details, and walked away with something I could actually build from. Much faster than starting from scratch in CAD."
DIY builder, Italy
Brief the CAD agent
Include dimensions, constraints, materials, and intended use when you know them.
Parts list and CAD exports
Review a geometry-derived list of part IDs, dimensions, quantities, and materials, download it as CSV, or export the model for downstream CAD and prototyping. Verify production details before fabrication.
Simple, transparent pricing
Start free. Top up when you need more.
Free
No credit card required
Includes up to 160 trial credits where available, so you can create your first CAD model. AI chat is charged by actual token usage.
- Up to 160 trial credits where available
- Free PNG viewport exports
- Photorealistic AI renders (50 credits each)
- Unlimited projects
- Full AI chat & parametric controls
Pay as you go
Top up whenever you need
Includes 1,000 credits — typically ~10 new CAD models or ~20 model updates.
- Everything in Free
- STEP, DXF, 3MF, GLB, DAE, OBJ & STL exports unlocked
- Full parts list & CSV cut-list export
- Printable PDF drawings
- New CAD models typically ~100 credits, complex 150+
- Model updates typically ~50 credits, complex 80+
- Priority AI model access
Common questions
Can you 3D print without CAD?
Yes. You don't need CAD software or CAD experience to create printable parts — you need a dimensioned model. Prompt2CAD builds that model for you: describe the part in plain language (or answer a few guided questions), inspect the dimensions on the generated geometry, adjust anything that's off through conversation, and export 3MF or STL straight into your slicer. The CAD step is handled by the agent, not by you.
Do you need CAD for 3D printing?
You need a 3D model, not CAD skills. A slicer can only print what it's given, so someone has to produce dimensioned geometry — traditionally that meant learning Fusion, FreeCAD, or SolidWorks. An AI CAD tool collapses that step: state what the part must fit, hold, or mount, with the measurements you know, and get real parametric geometry you can verify and export as 3MF, STL, or STEP. For engineering-critical tolerances, take the STEP export into a traditional CAD tool for the final pass.
Ready to model your custom build?
Describe your build, refine the dimensions with the agent, and export it to your workflow.
No CAD experience needed · Up to 160 trial credits where available · No credit card required.