STL → OBJ

Convert STL to OBJ

Convert STL files to OBJ in seconds. Geometry, UVs and materials are carried over where OBJ supports them, and the model lands the right way up.

  • Geometry, UVs and materials kept where supported
  • Correct orientation and scale
  • Runs on your computer: nothing is uploaded
No file yet
Drop an STL file or
Files stay on your computer.
Done

How to convert STL to OBJ

  1. Add your STL file

    Drop it on the converter above or click browse. It opens in your browser, so nothing is uploaded.

  2. Check the format is OBJ

    OBJ is already selected. You can switch to any other output from the menu.

  3. Convert and download

    Click Convert and your OBJ file is ready in seconds. Download it straight away.

What is STL?

STL describes a surface as a list of triangles, with no colour, material or unit information. It is the default file for 3D printing and is exported by almost every CAD and modelling program.

Full name
Stereolithography
Type
Triangle mesh
Used in
Cura, PrusaSlicer, Bambu Studio, Blender, Fusion 360, SolidWorks
Strength
Universal support in 3D printing software.
Limits
Only triangles: no colours, no materials, no units, no editable CAD features.
More about STL

What is OBJ?

OBJ is a plain-text mesh format with optional texture coordinates and normals; materials and textures live in a companion .mtl file. It opens almost everywhere, from Blender to 3D printing software.

Full name
Wavefront OBJ
Type
Triangle mesh
Used in
Blender, Maya, 3ds Max, Cinema 4D, ZBrush, most slicers
Strength
Opens in nearly every 3D program and keeps textures through its .mtl file.
Limits
No animation; large files because it is text.
More about OBJ

Related conversions

STL → STEPSTL → STPSTL → IGESSTL → BREPSTL → FBXSTL → GLBSTEP → OBJSTP → OBJIGES → OBJFBX → OBJGLB → OBJglTF → OBJ

Questions

Are materials and textures kept?

Colours and texture coordinates are carried over when OBJ supports them. Texture images are kept for formats that can hold them.

Will my model be upside down?

No. STL and OBJ may use different "up" directions, and we rotate the model so it stands the same way in your software.

Are my files uploaded?

No. The conversion runs inside your browser.