STL converter, in your browser.
Convert STL files to OBJ, GLB, PLY and glTF, or turn other files into STL. Everything on this page is converted in your browser, so your files never leave your device.
Drop STL files here
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from Photos or Files
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About STL
STL describes a surface as a list of triangles and nothing else: no colour, no materials, no units. That simplicity made it the standard input of 3D printers and slicing software. It exists as binary and as text; the binary one is much smaller.
STL has no colour, no units and no texture, and it is large for detailed models. STL is accepted by every 3D printer and slicer.
- Stands for
- Stereolithography file
- Type
- 3D model
- Compression
- None
- Introduced
- 1987, by 3D Systems
- Opens in
- Every slicer and 3D printing program, CAD tools and Windows 3D Viewer
- Best for
- 3D printing
- File extension
- .stl
- MIME type
- model/stl
Questions
How do I open an STL file?
STL opens in: every slicer and 3D printing program, CAD tools and Windows 3D Viewer. If your device or app cannot open it, convert it to OBJ or GLB above.
What can I convert STL to?
toany converts STL to OBJ, GLB, PLY and glTF.
What can I convert to STL?
toany creates STL files from OBJ, PLY, glTF and GLB.
Are my files uploaded?
No. Every STL conversion listed here runs inside your browser. The files stay on your device.
Other 3d model formats
- OBJOBJ converterA plain-text 3D mesh that nearly every 3D program reads and writes.
- PLYPLY converterThe Stanford polygon format used by 3D scanners; stores vertex colours.
- GLTFglTF converterThe JPEG of 3D: an open web and AR format, as a JSON file.
- GLBGLB converterglTF packed into one binary file; the usual format for web 3D and AR.