OBJ to STL Converter

Free online 3D file converter — convert your OBJ to STL format in seconds

1Choose Files

2Convert To

3Convert Now

Drag & drop your OBJ file here or click to browse

Max. size 50MB

stl

How to Convert OBJ to STL

Transform your 3D model from OBJ to STL in three simple steps

Step 1

Upload Your OBJ File

Select the OBJ file you want to convert from your computer, Google Drive, or OneDrive. You can also drag and drop it directly into the upload area.

Step 2

Select STL as Output

Choose STL as your desired output format. Our 3D converter will handle the rest automatically.

Step 3

Download Your STL File

Click "Export" and download your converted STL file in seconds. Your 3D model is ready to use.

OBJ vs STL: Format Comparison

Understanding the key differences between OBJ and STL helps you choose the right 3D format for your workflow

Feature	OBJOBJ	STLSTL
File Extension	.obj	.stl
Geometry Data	✓ Supported	✓ Supported
Color Support	✓ Supported	✗ Not supported
Texture Mapping	✓ Supported	✗ Not supported
3D Printing Compatible	✓ Supported	✓ Supported
Animation Support	✗ Not supported	✗ Not supported

What is a OBJ File?

OBJ Converter

OBJ is a widely supported 3D model format that supports vertex positions, texture coordinates, normals, and materials via companion MTL files. It is ideal for editing and rendering workflows.

What is a STL File?

STL Converter

The Stereolithography (STL) format stores surface geometry as triangulated mesh data. It is the universal standard for 3D printing but lacks support for colors, textures, and materials.

Frequently Asked Questions

Everything you need to know about converting OBJ to STL

Upload your OBJ file using the drag-and-drop area above, select STL as the output format, and click "Convert Now." Your converted file will be ready to download in seconds. No software installation is needed.

The geometry of your 3D model is fully preserved during conversion. However, format-specific features like textures, materials, or animations may not carry over if the target format does not support them. The mesh shape and dimensions remain identical.

Yes, you can upload multiple files at once. Simply drag and drop all the 3D models you want to convert into the upload area, or use the Choose Files button to select several at once. Each will be processed individually.

Yes, our 3D converter is completely free for basic use. You can convert files up to 50MB without creating an account. For larger uploads or batch processing, we offer affordable premium plans.

Absolutely. All transfers are encrypted using SSL/TLS. Your 3D models are processed on secure servers and automatically deleted within 24 hours. We never share, sell, or access your data.

No, our converter works entirely in your web browser. There is nothing to download or install. Upload your file, choose the output format, and click to convert.