OBJ to STL
Convert OBJ files to STL for 3D printing in seconds. Upload your .obj model and download a print-ready .stl that opens in any slicer.
Convert OBJ to STL in one step
Upload an OBJ model and get back an STL file ready for your slicer. OBJ is the format most 3D apps and model libraries hand you; STL is what 3D printers and slicers expect. This converter swaps one for the other at full fidelity, so the shape comes across exactly as it is.
How to convert OBJ to STL
- Upload your .obj file.
- Run it.
- Download the .stl and open it in Bambu Studio, PrusaSlicer, Cura, or any other slicer.
Features
- Full-fidelity geometry. Converted through Blender, so every vertex and face comes across unchanged.
- Print-ready output. A standard STL that every common slicer opens.
- Nothing to install. Runs in your browser.
- Works with any OBJ. Model-library downloads, 3D scans, or models from Image to 3D Model.
FAQ
How do I convert an OBJ file to STL?
Upload the OBJ here and run it. You get an STL back in seconds, with no software to install.
Will I lose colours and textures?
Yes. STL stores geometry only, so the materials, colours, and textures in an OBJ are dropped. The shape itself is kept exactly.
Do I need to upload the .mtl file?
No. The MTL file only describes materials, which STL does not support.
Is the STL ready to print?
It is a valid STL your slicer will open. If the original model has holes or broken geometry, run it through STL Repair first so it slices cleanly.
Can I convert STL back to OBJ?
Yes, use STL to OBJ.
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