Here are some sites with useful tools for 3D printing.
Several of these have conversions for many types of files.
- I went from a PNG to GLB and then to an STL and printed photos of my kids.
- Image to GLB
- Meshy: GLB to STL Free 3D File Converter
- Another GLB to STL site
- 2D PNG/JPG Images to 3D STL Mesh files
- Convert Image to STL with AI
- And this is super helpful
- STL repair tool!