Convert PNG to STL
Turn your transparent PNGs, logos, and designs into solid STL files. Perfect for 3D printing, CNC machining, and laser engraving workflows.
Image to 3D Model Converter
Upload any image — photo, sketch, product shot — and watch our AI transform it.
Maintenance in Progress
We are currently updating our moderation system.
Upload an image
Drag and drop or click to browse
No images? Try these examples
Configuration
By uploading an image, you agree to our Terms of Service. Generated models are private by default.
From 2D PNG to Physical 3D Print
We specialize in interpreting PNG alpha channels to create watertight geometry for makers.
Lithophanes
Turn family photos into glowing 3D prints. Darker areas become thicker, lighter areas thinner, revealing the image when backlit.
Watertight Meshes
Our AI ensures the output is "manifold" — meaning no holes or reversed normals. Drop the STL straight into Cura or PrusaSlicer.
Logo Extrusion
Upload a black and white logo, and we will extrude it into a 3D badge aimed for printing or laser engraving.
How to create a 3D Print from PNG
Prepare your file for the printer in three steps.
Upload PNG
Ensure your PNG has transparency for shape cutouts, or use grayscale for lithophanes.
Generate STL
Our algorithm calculates height maps based on pixel brightness and alpha values.
Slice & Print
Download the .STL file and open it in your favorite slicer (Cura, PrusaSlicer, etc) to print.
Understanding the PNG to STL Process
PNG files are raster images, made of pixels. STL files are vector-based meshes, made of triangles. Converting one to the other requires translation rules. At imgto3d.io, we use two primary methods depending on your image:
Alpha Extrusion
Best for logos and shapes. We ignore transparent pixels and "pull" variable pixels up to create a solid 3D block in the shape of your image.
Height Mapping
Best for photos. The brighter a pixel is, the higher it sits on the Z-axis. Black is flat, White is peak height. This creates a relief surface.
Slicer Settings Tips
- • Scale: STL files from images are unitless. You WILL need to scale them up in your slicer (e.g., 500% or to specific mm dimensions).
- • Infill: For lithophanes, set infill to 100% to ensure light passes through correctly without grid patterns appearing.
- • Orientation: Print flat objects vertically (standing up) for better resolution on FDM printers, or flat on the bed for resonance/strength.
Common Use Cases
- Cookie Cutters: Take a simple black outline on white background, convert to STL, and print a custom cutter for your bakery.
- Keychains: Convert a company logo, add a loop in your 3D software (or punch a hole), and print custom merchandise.
- Topographic Maps: Use a grayscale heightmap from geographic data to print a tangible 3D map of a mountain range.
Frequently Asked Questions
Does it handle transparent PNG backgrounds?
Yes. The AI recognizes transparent areas in PNGs and treats them as empty space, extruding only the visible pixels. This is perfect for logos.
Is the STL ready to print?
Yes. We generate watertight, valid STL binary files. You can drop them directly into any slicer software.
What is the scale of the output model?
The model is generated in normalized units. You should scale it to your desired physical dimensions (e.g., in millimeters) inside your slicer software.