JPG photo → printable STL: heightmap relief/lithophane or contour stamp, free online.
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For everyday JPG photos: heightmap maps brightness to a relief, great for portrait reliefs and lithophane panels; contour extracts outlines into solid stamps or silhouettes. JPG has no transparency channel, so crop complex backgrounds first. Everything runs locally in your browser.
Original
Contour
Heightmap
DefaultContour
Select how the image should be converted into 3D geometry.
Generates solid shapes with uniform thickness from image outlines. Ideal for stamps, logos, nameplates, and other uniform-thickness objects.
Creates a relief surface based on image brightness, so brighter areas are raised and darker areas are recessed. Perfect for photo reliefs, terrain models, and artistic surfaces.
DefaultOff
Swap which parts of the image become solid and which become empty. Useful when the background is lighter than the subject.
Default128
Range0 – 255
Controls the brightness cut-off point that determines which pixels become solid geometry. Lower values include more pixels as solid; higher values only include the darkest areas.
Default10
Range1 – 100
The thickness of the extruded geometry in millimeters. Controls how tall the final 3D model will be.
Default0.5
Range0 – 5 · step 0.1
Adds rounded edges to the contour shape for a smoother, more polished finish. Higher values create more rounded edges.
Default3
Range1 – 8
The number of segments used to create the bevel curve. More segments produce smoother bevels at the cost of more geometry.
Default0.8
Range0 – 1 · step 0.1
Preserves sharp corners and fine details by controlling the angle threshold. Lower values protect more detail; higher values smooth more aggressively.
Default1
Range0.1 – 2 · step 0.1
Controls the resolution of the generated mesh. Higher quality produces smoother surfaces but larger file sizes.
Default5
Range0.5 – 20 · step 0.5
The maximum height of the raised areas in millimeters. Controls the overall relief depth.
Default1
Range0 – 5 · step 0.5
The thickness of the flat base plate beneath the relief. A thicker base provides more stability for printing.
Default2
Range0 – 10
Applies smoothing to the heightmap surface to reduce noise and stair-stepping artifacts. Higher values produce smoother surfaces.
Default400
Range100 – 400 · step 50
Controls the detail level of the generated mesh. Higher resolution preserves more image detail but increases file size.
DefaultOff
Swap the height mapping, so brighter areas become recessed and darker areas become raised.
Drag in a JPG; crop busy backgrounds first and choose high-contrast subjects for sharper reliefs.
Heightmap builds a relief or lithophane from brightness; contour extracts outlines for a solid stamp.
Balance detail against polygon count, then download the STL and print it.
It is best for photo reliefs and lithophane panels using the heightmap mode. Simple high-contrast images can also become stamp-style solids with the contour mode. Since JPG has no transparency, cutout stamps are easier with a transparent PNG.
A heightmap maps brightness to thickness: lithophanes use backlighting to reveal the image while regular reliefs rely on surface variation. The contour mode extracts outlines and extrudes them into a solid. You can switch modes and adjust resolution before converting.
First increase contrast, crop out cluttered backgrounds, or convert the image to grayscale before uploading. The tool relies mainly on brightness information, so clean black-and-white or grayscale images are usually more reliable.
No. STL stores geometry only. For a color photo model, use the JPG-to-3MF tool or paint the print after it finishes.
Everything runs locally in your browser, so a huge image takes longer and creates a heavier model. Lower the resolution setting (100-400) to convert faster with fewer polygons, or resize the image first.
JPEG compression noise can carry into the relief surface. Increase the smooth level (0-10) to soften it, and start from a higher-quality export for the cleanest result.
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