How to Convert an Image to STL

Converting a 2D image into a 3D-printable STL file is a common need for makers, hobbyists, and 3D printing enthusiasts. This guide covers three methods — from quick online conversion to professional software workflows.

Method 1: Online Converter (Recommended)

The fastest way is using our online Image to STL converter. No software to install, no registration required. Simply:

  1. Upload your image (JPG, PNG, or SVG).
  2. Adjust the height, smoothness, and base thickness using sliders.
  3. Preview the 3D model in real-time — rotate, zoom, inspect.
  4. Download the STL file and open in your slicer.
Try the Converter

Method 2: Using Blender

Blender is a free, open-source 3D modeling suite. Its Displace modifier can generate a mesh from any grayscale image. Steps:

  1. Create a subdivided plane (Add → Mesh → Plane, then subdivide 50+ times).
  2. Add a Displace modifier, set the texture to your image.
  3. Adjust the strength to control relief depth.
  4. Apply the modifier, then export as STL (File → Export → STL).

Method 3: Cura Image Import

UltiMaker Cura (the popular 3D printing slicer) can directly import images and generate lithophane-style prints:

  1. Drag and drop a JPG or PNG into Cura.
  2. Configure the height, base, and width/depth settings.
  3. Cura generates the model and you can slice directly.
  4. Works great for lithophanes but less flexible for custom relief designs.

Method Comparison

Method Speed Control Cost
Online Converter Instant Basic Free
Blender 10-20 min Full Free
Cura 2-5 min Limited Free