Free Online CAD Viewer for the Automotive Industry.
A lightweight, online tool to convert 3D file formats—anytime, anywhere, without installing any software.
Drag & drop your 3D files
Supported formats: STEP (.step, .stp), IGES (.igs, .iges), STL (.stl), PLY (.ply), OFF (.off), BREP (.brp, .brep)
File stay private
Automatically deleted after 24hrs
add upto 300MBRole of CAD file in Automotive Industry
CAD files are central to the design and development of vehicles including powertrain systems, body structures, suspension, and interior components. Engineers use these files to run simulations for crash safety, thermal performance, and fluid dynamics. CAD files also serve as the foundation for generating CNC toolpaths, validating manufacturability, and assembling complex systems digitally before production begins.
Common CAD File FormatsSTEP, IGES, BREP, STL, OBJ
Who uses CAD files?
Mechanical EngineersCAD DesignersSimulation AnalystsNeed CAD access
Sales EngineersProcurement ManagersField TechniciansWhy they cant view CAD files?
Most non-technical roles lack access to expensive CAD software, powerful computers, or the technical skills to handle large or complex CAD files. They often rely on engineers for screenshots or simplified versions, which slows down collaboration and decision-making.
The Solution: Marathon-OS CAD Viewer
Why Choose Marathon OS CAD Viewer?
Marathon OS CAD Viewer renders any CAD file instantly with a proprietary engine, ensuring seamless, lag-free visualization—no matter the model size.
Lightning-Fast Rendering
Marathon OS optimizes real-time CAD visualization with smooth performance, even for large and intricate models.
Supports Multiple Formats
View STEP, IGES, STL, BREP, and more with precision and clarity—right in your browser.
No Installation Required
Skip heavy software—just upload and start viewing instantly.
Cloud-Based & Secure
Files stay private and automatically delete after 24 hours for security.
Engineered for Professionals
Designed for engineers, manufacturers, and designers needing quick, high-quality CAD previews.
Essential Features of Marathon OS CAD Viewer
Effortlessly upload and view CAD files with a high-speed, secure, and scalable tool. Experience smooth, real-time rendering—no software installation required.
Seamless CAD File viewing
View STEP, IGES, STL, BREP, OBJ, PLY, OFF, and more—instantly and without setup delays.
Handles Large & Complex Models
Optimized to convert even intricate engineering models with accuracy and speed—no matter the size or complexity.
No Installation Required
view 3D files directly from your browser. no plugins—just drag, drop, and go.
Secure & Privacy-Focused
Your files are encrypted during upload, processed securely, and automatically deleted after 24 hours to protect your data.
FAQ
Find answers to common questions about Marathon OS CAD Viewer. Whether you're getting started or looking for advanced features, we've got you covered.
What is Marathon OS 3D CAD File Viewer?
What file formats are supported?
Is Marathon OS 3D File viewer free to use?
How is my data stored and secured?
Do I need any special software or training?
Can I view large and complex CAD models?
Simplifying Cloud PDM & PLM