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← 3D Model Converter

Convert STL to OBJ online

Drop a .stl file to turn it into OBJ. You see the model in 3D before converting, and the file never leaves your device.

What is kept when converting STL to OBJ

Geometry
Kept
Materials
Not in STL
Textures
Not in STL
Animation
Not in STL
Scene hierarchy
Not in STL

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.

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.

How it works

  1. 01

    Drop the .stl file (with its textures or .bin/.mtl files, if any).

  2. 02

    Check the model in the 3D preview; OBJ is already selected.

  3. 03

    Click “Convert” and the .obj file downloads.

Questions

Is the STL to OBJ converter free?+

Yes, without limits, sign-up or watermark.

Is my STL file uploaded?+

No. The STL file is read and converted in your browser; nothing is sent to a server.

Why are textures missing after converting STL?+

Textures stored as separate files must be selected together with the model. OBJ keeps them only if the format supports textures.

Convert STL to other formats

STL → GLBSTL → glTFSTL → PLYSTL → USDZ

Convert other formats to OBJ

GLB → OBJglTF → OBJFBX → OBJPLY → OBJDAE → OBJ3MF → OBJUSDZ → OBJ3DS → OBJVOX → OBJVRML → OBJ3DM → OBJAMF → OBJLWO → OBJKMZ → OBJMD2 → OBJVTK → OBJSVG → OBJ

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