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PNG to 3MF

PNG → Color 3MF: transparent backgrounds for color-printed badges and stamps, or color photo reliefs. Free online.

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About This Tool

Turn a PNG into a color 3MF, ready for color print previews and modern slicers. The transparent channel helps extract badge and logo contours; photos can become color reliefs through height maps. Final color still depends on your printer and material.

Tips

  • 1Transparent PNGs work best for color badges and stamp outlines
  • 2Color data survives in 3MF, unlike a plain STL export
  • 3Print a small test swatch before scaling up production

How to Use

  1. 1

    Upload your PNG

    Drag in a PNG: transparent areas suit color badges and stamp outlines, while photos can be turned into color reliefs with a height map.

  2. 2

    Choose a mode and adjust detail

    Pick contour or heightmap mode, then tune the resolution and level of detail.

  3. 3

    Export the color 3MF

    Save the 3MF and preview it in a color printer or modern slicer; final colors depend on the printer and material.

About Configuration Options

Conversion Mode

Conversion Mode

Outline Extrude
Select how the image should be converted into 3D geometry.
  • Outline ExtrudeRecommended: Generates solid shapes with uniform thickness from image outlines. Ideal for stamps, logos, nameplates, and other uniform-thickness objects.
  • Heightmap: Creates a relief surface from the image's light and dark areas. By default darker parts are raised; change it under Raise By to lighter, vivid colors, or custom per color. Great for photo reliefs, terrain models, and artistic surfaces.

Size

Width (X)

100mm10mm – 500mm
Final model width, including the base. With the aspect ratio locked, the length follows the shape's proportions and does not change with Detail.

Length (Y)

Locked to the width by the shape's aspect ratio. Editing it rescales the width.

Lock Aspect Ratio

on
When on, the height follows the width using the shape's proportions. Turn off to set width and height separately (the model is stretched).

Background

Background

By Brightness
By Brightness: transparent areas of a PNG are the background; opaque images are split by Threshold. Remove by Color: transparent areas plus pixels close to any picked color are removed. Keep Background: nothing is removed.

By Brightness · Remove by Color · Keep Background

Background Colors

#ffffff
Pixels close to any of these colors are removed. Add a second color for gray-and-white checkerboards or two-tone backgrounds (up to 4).

Tolerance

150 – 100
Higher values also remove colors further from the picked ones. Raise it if a colored fringe remains or the background is uneven.

Transparent Fill

White
Fill transparent areas with this color and keep the whole image.

White · Black

Format Information

Input format

Extension:
png
Full Name:
Portable Network Graphics
Type:
Image
Format:
PNG
Tools:
Photoshop、GIMP、Krita、Paint.NET
Open With:
Image Editor、Windows Photos、Preview (Mac)
Description:
PNG is a lossless raster format with 8-bit alpha transparency, offering sharp edges and no artifacts. It is preferred for converting silhouettes to 3D models, avoiding color banding and producing cleaner meshes than JPEG. The trade-off: larger file sizes than JPEG, no CMYK support. For 3D conversion: use 16-bit grayscale for height maps; transparent backgrounds are auto-detected, so manual masking is unnecessary.

Notes:

  • Transparent backgrounds are automatically detected and handled

Supported Features:

  • Lossless compression preserves image quality
  • Alpha channel transparency for precise contour extraction
  • Wide color support (24-bit RGB + 8-bit alpha)

Output format

Extension:
3mf
Full Name:
3D Manufacturing Format
Type:
3D Model
Format:
3MF
Tools:
Bambu Studio、PrusaSlicer、OrcaSlicer、Cura
Open With:
Windows 3D Viewer、3MF Viewer Online、Blender、3D Model Viewer
Description:
3MF is a modern 3D printing format from the 3MF Consortium, based on XML and packaged as a ZIP container. It preserves mesh data and supports per-part color, material, texture, and print properties. It is recommended for multi-color and multi-material printing. Major slicers (Bambu Studio, PrusaSlicer, OrcaSlicer) have native support. Compared to STL, 3MF carries richer information but is more complex. Some older slicers and printers may not recognize it. When converting from other formats, color and material mapping depend on source data. For simple single-color printing, STL remains sufficient. For multi-color, multi-material, or print parameter transfer, choose 3MF.

Notes:

  • Some older slicers and printers may not support 3MF
  • More complex than STL but carries richer information

Supported Features:

  • Per-part and per-vertex color support
  • Material and texture preservation
  • XML-based with ZIP compression
  • Native support in Bambu Studio, PrusaSlicer, OrcaSlicer

Frequently Asked Questions

View all FAQs

What's the difference between PNG to 3MF and PNG to STL?

3MF can carry color, which makes it better for color-printed badges and color relief previews; STL is geometry only. Choose 3MF whenever color matters, and use PNG to STL only for monochrome solids.

How is a transparent background handled?

Transparent areas usually generate no geometry, leaving a hollow cutout with only the opaque subject. This suits transparent PNG stamps, badges, and silhouette-style logos.

Will the colors be fully preserved?

The tool writes PNG colors into the 3MF as faithfully as possible. Clean, high-contrast images produce the most stable results; the final print color still depends on your printer, material, and slicer settings, so run a small test print first.

What kind of PNG works best for color printing?

Images with clean edges and clear subject-background separation perform best. For badges and logos, favor transparent backgrounds; for photo reliefs, use an evenly lit, non-overexposed image and crop the subject if needed.

Why do the colors in my 3MF look simplified or banded?

Outline Extrude mode merges similar colors into flat regions, so smooth gradients become stepped bands and subtle shading gets flattened. Heightmap mode keeps the photo colors as a textured surface, so choose it when you need smooth gradients.

Can I get different colors on different parts of the model?

Yes. Each extracted color region keeps its own color in the 3MF, so a multi-color logo appears in color in your slicer. Whether regions map to separate material slots depends on the slicer and printer; on single-material machines the colors act as a preview.