JPG photo to color 3MF: color-printed photo reliefs and badge previews, free and online.
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Turn everyday JPGs into colored 3MF for color printing and slicer preview. Use heightmap mode for color photo reliefs; contour mode for solid badge outlines (JPG has no transparency, so keep the background clean). Final colors depend on your printer and material.
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 and drop your JPG file or click to browse.
Choose contour or heightmap mode and adjust parameters.
Click Convert and immediately download your 3MF file.
Choose 3MF when you want color preview or color printing; use STL for single-color geometry. For photo reliefs where you need to see color regions, 3MF is more intuitive.
The tool preserves JPG colors in the 3MF as much as possible, but printers, materials, and slicer color management all affect the result. Test print a small swatch first, and correct the tone in the image beforehand if needed.
Contour mode relies on brightness contrast: use a white background or high-contrast image, or cut out the subject in an image editor, export a transparent PNG, and use the PNG to 3MF tool. Heightmap mode is better for full photo reliefs.
A photo with a clear subject, moderate contrast, and a simple background. Very dark, overexposed, or heavily JPEG-blocky images reduce both relief quality and color fidelity.
In contour mode, the depth setting (1-100mm) controls the solid thickness, and bevel softens the edges. In heightmap mode, max height sets the highest point and base thickness adds a solid slab underneath. All vertical dimensions are in millimeters.
Switch the contour target so it extracts light areas instead of dark ones (for example a light logo on a dark background), and the design becomes recessed into the solid. Check the preview before exporting to confirm the direction.
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