Free Online 3D Model Converter
Securely convert STL, OBJ, GLB, and 3MF files in your browser.
Drag & Drop your 3D file here
Supports: STL, OBJ, GLB, GLTF, 3MF
Stop Converting. Start Printing.
Did you know you don't always need to convert your files? Polar Cloud's Universal Slicer accepts nearly any 3D format and prepares it for your specific printer automatically.
| Format | Usage | Polar Cloud Support |
|---|---|---|
| STL | Standard legacy format. Geometry only. | ✅ Native Support |
| OBJ | Common for design software (Blender, Maya). | ✅ Native Support |
| 3MF | Modern standard. Contains color, materials, & scale. | ✅ Native Support |
Your IP Never Leaves Your Device
Unlike other free converters, we do not upload your files to a cloud server to process them. Our converter runs 100% locally in your browser using WebAssembly. We cannot see, store, or steal your designs.
Frequently Asked Questions
Is this tool really free?
Yes. You can use the tool for free as a guest (up to 3 times a day) or create a free Polar Cloud account for unlimited conversions.
Why convert 3MF to STL?
While 3MF is superior, many older slicers only accept STL. This tool allows you to downgrade modern files for legacy machines.
Can I convert GLB/GLTF to STL?
Yes! This is perfect for 3D printing assets from web marketplaces or Blender exports that are usually in web-ready GLB format.
Why use Polar Cloud instead of converting?
Polar Cloud's "Universal Slicer" supports most major 3D formats natively. You can often skip conversion entirely by just uploading the file to your Cloud Library.