Easily convert your . files to . format using our powerful online 3D CAD converter—no downloads or installations required.
Drag & drop your 3D files here to convert
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add upto 300MBStereolithography is a widely used file format for 3D printing and computer-aided design (CAD). It is primarily used for representing 3D models in a way that can be understood by 3D printers, CNC machines, and other manufacturing technologies.
OBJ is a popular file format used for representing 3D geometry, primarily in the fields of computer graphics, 3D modeling, and animation. It was originally developed by Wavefront Technologies for their Advanced Visualizer software, and has since become a widely adopted format for exchanging 3D models across various applications.
Marathon OS lets you convert 3D CAD files between formats effortlessly with a powerful, cloud-native engine—fast, secure, and optimized for professionals.
Convert your 3D CAD files in seconds, no matter the size or complexity. Marathon OS uses a high-performance backend to deliver rapid results.
Forget bulky desktop tools—just upload your file and convert directly from your browser.
Built for engineers, designers, and manufacturers who need reliable, high-quality conversions to suit their workflows.
Convert between STEP, IGES, STL, OBJ, PLY, OFF, and BREP formats—all from a single, unified interface.
All files are securely processed in the cloud and automatically deleted after 24 hours to ensure your data stays safe.
Effortlessly convert 3D CAD files with a fast, secure, and scalable cloud tool. Experience seamless format conversion—no software installation required.
Convert STEP, IGES, STL, BREP, OBJ, PLY, OFF, and more—instantly and without setup delays.
Optimized to convert even intricate engineering models with accuracy and speed—no matter the size or complexity.
Convert 3D files directly from your browser. No downloads, no plugins—just drag, drop, and go.
Your files are encrypted during upload, processed securely, and automatically deleted after 24 hours to protect your data.
Find answers to common questions about Marathon OS 3D CAD File Converter. Whether you're getting started or looking for advanced features, we've got you covered.
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