Works great
- A sketch or drawing of the part you want
- A photo of a broken piece you need to replace
- A logo or silhouette to emboss, cut, or turn into a badge
- A photo of a pet or object to sculpt as a figurine
Turn an image into
a 3D model you can print.
Drop in a photo, a sketch, or a reference and describe the part. GrandpaCAD generates a printable, editable 3D file, not a messy scan you can never change.
Start Free - No Credit Card Required
+1k
Loved by 2,000+ makers4,500+ models generated
Thinking...
One upload, two very different engines
"Image to 3D" means two different jobs, and most tools only do one. GrandpaCAD reads your image and picks the right engine: parametric CAD for parts, organic sculpting for characters. You can also just tell it which one you want.
Sketch to CAD
A drawing becomes a dimensioned part
Sketch the part on paper, photograph it, and give the dimensions in chat. The AI compiles a parametric model with real millimetres: threads, chamfers, clearances. This is image to 3D CAD, not a traced outline.
- Exact dimensions from your message, not guessed from pixels
- Threads, fillets, and tolerances modeled properly
- Every measurement stays adjustable with a slider
Photo to organic
A photo becomes a full-color figurine
Turn a picture into a 3D model of the sculpted kind: a photo of your dog becomes a printable figurine with color regions already segmented for a multi-material printer. No sculpting, no manual painting.
- Full-color output, pre-split into filament shells
- Works from a single photo, no scanning rig
- Watertight mesh that slices without repair
How it works
From image to printable file in three steps
- 1
Drop in your image
A sketch, a photo, a spec drawing, or a logo.
- 2
Describe what you want
Give the dimensions and the fit; the AI builds to match.
- 3
Tweak and download
Adjust any dimension with a slider, then download and print.
What to expect
An image is a starting point, not a magic scan.
Most "image to 3D" tools hand you a lumpy mesh you can't edit and can't print cleanly. GrandpaCAD reads your image for intent, then generates a real model you can keep adjusting in plain English until it fits.
Reach for a 3D scanner instead
- Reproducing a complex object exactly from one photo
- Scan-grade capture of fine surface texture
- A game-only asset you never intend to print
The differentiator
A model you can change, not a mesh you're stuck with
Photogrammetry and mesh generators produce geometry that is frozen the moment it lands. GrandpaCAD output stays live: change the hole spacing, thicken a wall, or resize the whole part with a sentence, and the geometry rebuilds cleanly.
- Watertight geometry that slices without repair
- Parametric parts expose every dimension as a control
- Change requests in plain English, no CAD skills needed
Why makers pick GrandpaCAD
Most image-to-3D tools optimize for game assets. We optimize for parts you actually print and can edit later.
 GrandpaCAD | Photogrammetry apps | Mesh AI generators | |
|---|---|---|---|
| Output | Editable parametric model | Dense static scan | Un-editable mesh |
| Print-ready | Watertight, slices clean | Needs heavy repair | Often non-manifold |
| Change it later | One sentence | Re-scan the object | Start over |
| Input needed | One image plus a sentence | Dozens of photos | A text prompt only |
One toolbox for every 3D modeling job, all in one chat.
- Describe it, get a real modelA phone stand tilted 15°
- Exact measurements that stickM5 bolt, 32 mm spacing
- Sculpt organic shapesA coiled dragon
- Precise and artistic, fusedNewDragon on a measured base
- Turn a photo or sketch into a part
- Engrave names and patternsEngrave a name on the lid
- Looks up real part specsNew
- Asks before it guesses
Start from an image, or from any of these
Open any model in the public library and tell the AI what to change. No account needed to look around.
Loved by makers
2,000+ people making real prints
Unedited feedback from the in-app rating prompt. We only show country to keep makers anonymous.
"generated a printable design on the first try!"
"Fast easy and good quality"
"It's working good. Grandpa!"
"yay so fun"
Pulled from real CSAT survey responses inside the GrandpaCAD app.
Made for My Grandpa
This tool was created for my grandfather who loves 3D printing but struggles with complex modeling software. He doesn't speak English, which makes most 3D design tools inaccessible to him.
Despite these challenges, he's passionate about creating 3D prints for our family. He uses his BambuLab A1 printer and now can easily create custom models by simply describing what he wants.
Read His Story
Same quality on every plan.
Every plan generates the same models at the same quality. The difference is how much you generate and how much control you want. Tweaking a finished model with the sliders never counts as a generation.
Free trial
$03 models, no card
Just to get a feel for it. The output is the same quality as every paid plan.
- 3 generations
- Full-quality output
- No credit card
Credit packs
$12+one-off, valid one year
For a single project. A fixed number of generations, no recurring charge.
- Starter $12 · Plus $22 · Pro $45
- Costs more per model than a plan
- Valid for one year
Subscription
$24per month, 26% off yearly
For power users who want the full platform and more generations than they will realistically use.
- 70 generations a month
- Private models, commercial license
- Multiple workspaces and more control
Common questions
Can I turn a photo into a 3D model for printing?
Yes. Drop in a photo and GrandpaCAD generates a sculpted, full-color model from it. It works best when the subject is clear: a pet, a character, an object on a plain background. You get a watertight mesh that slices without repair.
How do I turn a sketch into a CAD model?
Upload the sketch, then describe the part and its key dimensions in the chat. The AI reads the shape from your drawing and compiles a parametric model to the millimetres you give it. Every dimension stays adjustable afterward.
Is the generated model editable?
Yes, and that's the point. Parametric parts expose every measurement as a slider, and any model can be changed by asking in plain English: make it taller, add a hole, thicken a wall. Tweaking never costs a generation.
What file formats can I download?
STL, 3MF, OBJ, GLB, and GLTF. The 3MF loads 1:1 in Bambu Studio, PrusaSlicer, and Orca, with multi-color models already split into filament regions.
Is there a free version?
You get 3 free generations with no credit card, at the same output quality as every paid plan. After that, credit packs start at $12 and subscriptions at $24 a month.
Related guides and tools
- How image to 3D works under the hoodThe blog post on what the image pipeline does with sketches, photos, and drawings.
- Sketch modeDraw directly in the app and turn the drawing into a part.
- Organic modeHow sculpted, multi-color generation works and what it's good at.
- CAD for 3D printingThe no-CAD route to precise printable parts, compared with the usual suspects.
- 3D modeling for 3D printingA beginner's map of every way to get a printable model.
- Convert 3D filesFree converters between STL, 3MF, OBJ, GLB, STEP, and more.
Upload an image.
Print the part tonight.
3 free models, no credit card. See what the AI makes of your first image.