Convert STL to OFF
Free online STL to OFF converter. No signup required.
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How to Convert STL to OFF
Follow these simple steps to convert your file in seconds.
- 1
Upload your .stl file
Drag and drop your .stl file into the upload area, or click "Browse" to select it from your device. Your file is uploaded securely and processed on our servers.
- 2
Click "Convert to OFF"
Once your file is uploaded, press the convert button to start the STL to OFF conversion process.
- 3
Wait for the conversion to complete
The conversion usually takes just a few seconds. You can see the progress in real time while your file is being processed.
- 4
Download your converted .off file
When the conversion is finished, click the download button to save your new .off file. The file is ready to use immediately.
Understanding STL and OFF Formats
Learn about the source and target file formats to understand what happens during conversion.
Source Format
STL 3D Model
application/slaSTL (Stereolithography) is a 3D model format that represents surfaces as a collection of unstructured triangular facets, each defined by a unit normal vector and three vertices. Originally developed by 3D Systems for stereolithography 3D printing in 1987, it stores only geometry with no color, texture, or material information. STL exists in both ASCII and binary variants, with binary being more compact.
Advantages
- Universal standard format for 3D printing accepted by all slicers and printers
- Extremely simple format that is easy to generate and parse
- Supported by virtually all 3D modeling and CAD software
Limitations
- No support for color, texture, materials, or any non-geometry data
- Stores only disconnected triangles with no topology or vertex sharing information
- ASCII variant produces very large files; binary is more efficient but still lacks compression
Common Uses
- 3D printing file preparation and slicer input
- Rapid prototyping and additive manufacturing
- Simple 3D geometry exchange between CAD and modeling tools
Target Format
OFF 3D Model
application/x-offOFF (Object File Format) is a simple plain-text 3D model format that stores polygon meshes as lists of vertices and face definitions. It was developed at Princeton University and uses a minimal header followed by vertex coordinates and face indices. OFF is commonly used in computational geometry research and academic settings due to its simplicity.
Advantages
- Extremely simple format that is trivial to parse and generate
- Human-readable plain-text representation of polygon meshes
- Standard format for many computational geometry research datasets
Limitations
- No support for normals, textures, materials, or colors in the basic format
- Not widely supported by commercial 3D software or game engines
- Plain-text format results in large files for complex models
Common Uses
- Computational geometry research and algorithm benchmarking
- Academic 3D model datasets and mesh processing
- Simple polygon mesh interchange in educational contexts
Frequently Asked Questions
Common questions about converting STL to OFF.
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