Effortlessly view and inspect STL (.step, .stp, .stl, .ply, .off, .igs, .iges, .brp, .brep) files online. Marathon OS CAD Viewer delivers fast, secure, and high-performance rendering with no downloads needed.
Drag & drop your 3D files here
Supported formats:
File stay private
Automatically deleted after 24hrs
add upto 300MBMarathon OS CAD Viewer renders any CAD file instantly with a proprietary engine, ensuring seamless, lag-free visualization—no matter the model size.
Marathon OS optimizes real-time CAD visualization with smooth performance, even for large and intricate models.
View STEP, IGES, STL, BREP, and more with precision and clarity—right in your browser.
Skip heavy software—just upload and start viewing instantly.
Files stay private and automatically delete after 24 hours for security.
Designed for engineers, manufacturers, and designers needing quick, high-quality CAD previews.
Effortlessly upload and view CAD files with a high-speed, secure, and scalable tool. Experience smooth, real-time rendering—no software installation required.
Upload STEP, IGES, STL, BREP, and more for instant visualization without delays.
Powered by a proprietary rendering engine, ensuring zero lag even for intricate designs.
View 3D models directly in your browser—no downloads or plugins needed.
Your files are encrypted, private, and automatically deleted after 24 hours for security.
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.
Simplifying Cloud PDM & PLM