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3DPrintMates

Image to STL converter

Turn a PNG or JPG into a 3D-printable relief - signs, embossed logos, keychain tags or wall art. Set the size and height, preview it in 3D and download a watertight STL.

Create.png.jpg.webp→ .stlRuns locally

Drop an image here or

.png, .jpg, .jpeg, .webp · processed on your device, never uploaded

How to use the Image to STL

  1. 1Choose a PNG, JPG or WebP image. Logos and line art on a light background work best.
  2. 2Set the width in millimeters; the depth follows the image proportions.
  3. 3Set base thickness and total height. Dark areas rise to the total height.
  4. 4Adjust detail and smoothing, then check the preview.
  5. 5Download the STL and slice it like any other model.

Tips for a clean print

  • Use contrast. Convert photos to black and white with strong contrast before uploading.
  • Mind the detail setting. A 0.4 mm nozzle cannot reproduce features much smaller than about 0.4 mm, so a finer grid mostly adds file size.
  • Print flat. Reliefs print well flat on the bed with no supports. Smaller layer heights give smoother slopes.
  • Two colors: pause or swap filament at the layer where the raised design starts for a two-tone sign.

Image to STL vs lithophane

A relief is viewed by reflected light, so the design stands out from the surface. A lithophane is a thin panel viewed with a light behind it; thickness controls how much light passes through. For backlit photos, use the lithophane maker instead.

Frequently asked questions

How does image to STL conversion work?

Each pixel becomes a point on a 3D surface whose height depends on its brightness. Dark pixels are raised by default, which suits logos and line art on a light background. The result is a closed, printable solid with a flat base.

Can I convert a PNG or JPG to STL?

Yes. PNG, JPG and WebP all work. PNGs with a transparent background are ideal: transparent areas stay flat at the base height.

Will a photo turn into a full 3D model?

No. This tool makes a relief (a 2.5D surface), like an embossed sign or coin. Turning a photo of an object into a full 3D model requires AI reconstruction, which is a different process.

What image works best?

High-contrast images with clean edges: logos, silhouettes, text and line drawings. Increase smoothing for noisy JPEGs or photos.

Is the image uploaded?

No. The image is decoded and converted by your browser. Nothing is sent to a server.