Free STL Converter: STL to OBJ, 3MF, GLB & PLY
Convert 3D files between STL, OBJ, 3MF, GLB and PLY in seconds. Resize your model on the way. Everything runs in your browser, so your files stay private.
How it works
- Open your STL, OBJ, 3MF or PLY file.
- Choose the output format and, if needed, a new scale in percent.
- Click “Convert & download”. The new file is saved to your device.
Which format should I choose?
- STL: works with every slicer.
- 3MF: best for Bambu Studio, PrusaSlicer and Orca.
- OBJ: for Blender and 3D apps.
- GLB: for websites, AR and game engines.
- PLY: for MeshLab and 3D scans.
Resize while converting
Set the scale to 200% to double the size, or 50% to halve it. The model info panel shows the original size, so you can calculate the exact scale you need.
Frequently asked questions
Is my file uploaded?
No. Everything runs in your browser. Your file is read locally and never leaves your device, so it is safe for private and paid models.
Is it free?
Yes, it is 100% free, with no sign-up, no watermark and no file limit.
Can I convert STL to 3MF for Bambu Studio?
Yes. Choose 3MF as output format. The file uses millimeters, so it opens at the right size in Bambu Studio, PrusaSlicer and Orca Slicer.
Can I convert OBJ or 3MF to STL?
Yes. Open the OBJ or 3MF file and choose STL. Binary STL gives the smallest file; ASCII STL is readable as text.
Are colors and textures kept?
No. The converter keeps the geometry of the model, which is what you need for 3D printing. Colors, textures and print settings are not converted.