Convert STL to OBJ online — free, no signup, no upload
STL is the 3D-printing triangle mesh; OBJ is widely accepted by 3D modelling and rendering software. Converting STL→OBJ makes a printed-model file editable in more tools. This converter runs entirely in your browser: your file is read on your device, converted, and downloaded — it is never uploaded to a server.
How to convert STL to OBJ
1. Drag your file onto the box above, or click Open STL file. 2. Preview the model in 3D to confirm it's the right one. 3. Click Convert to OBJ & download — the new file saves straight to your device.
Frequently asked questions
How do I convert STL to OBJ?
Drop your .stl above or click Open, preview the model, then click Convert to OBJ & download. It all happens in your browser.
Is the shape identical?
Yes — the triangle geometry is preserved exactly; only the file format changes.
Is my STL uploaded anywhere?
No. Conversion runs entirely on your device.