Free & Instant

Convert OBJ to STL 3D Model Online — Free Converter

Transform OBJ 3D models to STL for 3D printing.

Upload your file

Drag & drop your .obj file here, or browse
Multiple files supported

.OBJ.STL

Maximum file size: 500 MB · Multiple files supported

100% private — files are processed in your browser, never uploaded

How It Works

OBJ to STL in 4 Easy Steps

Convert OBJ to STL in seconds — no sign-up, no upload, no catch.

  1. 1

    Upload OBJ file

    Drop your .obj 3D model or click Browse.

  2. 2

    STL auto-selected

    STL is pre-selected as the output format.

  3. 3

    Convert locally

    Your 3D model is converted to STL in your browser.

  4. 4

    Download STL

    Save your STL file — ready for 3D printing.

Use Cases

Why convert OBJ to STL?

  • Prepare OBJ models for 3D printing
  • Convert models for Cura, PrusaSlicer, and other slicers
  • Make OBJ files usable in CAD software

Related 3D Models Conversion Tools

Need to convert other formats? Try these popular free online tools.

.stl.obj
STL to OBJ
.glb.gltf
GLB to GLTF
.ply.stl
PLY to STL
FAQ

Frequently Asked Questions

Yes. All vertices, faces, and normals are converted faithfully.