Convert OBJ to STL online
Drop a .obj file to turn it into STL. You see the model in 3D before converting, and the file never leaves your device.
What is kept when converting OBJ to STL
- Geometry
- Kept
- Materials
- Lost
- Textures
- Lost
- Animation
- Not in OBJ
- Scene hierarchy
- Lost
About OBJ
Wavefront OBJ
OBJ is a simple, widely supported text format for polygon meshes. Materials live in a separate .mtl file and textures in image files; there is no animation.
About STL
Stereolithography
STL describes only the surface of a model as triangles — no colors, materials or textures. It is the default format for 3D printing and slicers.
How it works
- 01
Drop the .obj file (with its textures or .bin/.mtl files, if any).
- 02
Check the model in the 3D preview; STL is already selected.
- 03
Click “Convert” and the .stl file downloads.
Questions
Is the OBJ to STL converter free?+
Yes, without limits, sign-up or watermark.
Is my OBJ file uploaded?+
No. The OBJ file is read and converted in your browser; nothing is sent to a server.
Why are textures missing after converting OBJ?+
Textures stored as separate files must be selected together with the model. STL keeps them only if the format supports textures.
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