Convert STL to OBJ
The fastest way to convert Stereolithography to Wavefront OBJ online. Free, secure, and works on any device.
1How to convert STL to OBJ
Drag & drop your STL file into the box above.
Click "Convert" to transform it to OBJ instantly.
Save your new file to your device.
2Why use Flux Converter?
Zero Data Usage
Files are converted in your browser. No uploading means no data usage and total privacy.
Lightning Fast
Powered by WebAssembly, conversions happen instantly on your device.
No Limits
Convert as many files as you want, of any size.
Universal
Works on Windows, Mac, Linux, Android, and iOS.
3Why convert STL to OBJ?
Understanding the strengths and limitations of each format helps you decide when converting from STL to OBJ makes sense. STL was created by 3D Systems for their stereolithography machines in 1987. It became the universal standard for 3D printing despite its limitations. OBJ was developed by Wavefront Technologies in the 1980s for their Advanced Visualizer software. It remains one of the most universally supported 3D formats.
STL
OBJTarget
4Technical Details
| Feature | STL | OBJ |
|---|---|---|
| Full Name | Stereolithography | Wavefront OBJ |
| MIME Type | model/stl | model/obj |
| Category | 3D | 3D |
| Use Cases | 3D printing and prototyping, CAD model exchange, Medical modeling (implants, prosthetics), Engineering visualization | 3D model exchange between tools, Game asset creation, Architectural visualization, Scientific visualization |
| Description | STL is a file format native to the stereolithography CAD software created by 3D Systems. It describes only the surface geometry of a three-dimensional object. | OBJ is a geometry definition file format first developed by Wavefront Technologies. It is a simple data-format that represents 3D geometry alone. |
5Frequently Asked Questions
What is the difference between STL and OBJ?
STL (Stereolithography) and OBJ (Wavefront OBJ) serve different purposes. STL is a file format native to the stereolithography CAD software created by 3D Systems. It describes only the surface geometry of a three-dimensional object. On the other hand, OBJ is a geometry definition file format first developed by Wavefront Technologies. It is a simple data-format that represents 3D geometry alone. Converting between them lets you leverage the strengths of each format depending on your needs.
Does converting STL to OBJ lose quality?
This depends on the formats involved. For data and document formats, conversion typically preserves all content accurately. Our converter uses the best available algorithms to minimize any quality difference.
Is it safe to convert files here?
ABSOLUTELY. Unlike other sites, we do NOT upload your files to a server. All processing happens locally on your device using advanced browser technologies. Your files never leave your computer.
Is this service really free?
Yes, 100% free. No hidden fees, no watermarks, and no registration required. We support ourselves through non-intrusive advertising.
When should I use STL instead of OBJ?
STL is best for: 3D printing and prototyping and CAD model exchange. OBJ is better for: 3D model exchange between tools and Game asset creation. Choose whichever format best fits your workflow and compatibility requirements.
Can I convert STL on mobile?
Yes! Our converter works on iPhones, iPads, and Android devices. All processing happens in your browser — no app download needed.
Privacy Guarantee
Your files are yours. We do not store, view, or claim ownership of any content you convert. Processing is done entirely in your browser.