Industries we serve

CAD viewers built for every engineering discipline

Marathon OS opens, inspects, and reviews CAD files for teams across automotive, aerospace, manufacturing, and beyond — directly in the browser, with no installs.

32+

Industries

50+

File formats

300MB

Per file

Pick your industry

Each industry page includes part libraries, supported file formats, and tailored review workflows.

32 industries

Don't see your industry?

Marathon OS supports any team working with 3D engineering files. Get in touch and we'll help configure the right viewer for your workflow.

Marathon-OS Design Hub

Everything you need to design faster, smarter, and with more impact.

Trigyrate Rhombicosidodecahedron 1 | 3D CAD Engineering Model
Trigyrate Rhombicosidodecahedron 1 | 3D CAD Engineering Model
Nextruder Heater Block CAD Model
Nextruder Heater Block CAD Model
Plastic Loop for 3D Printer Filament Loading
Plastic Loop for 3D Printer Filament Loading
Protection Cap Tcf254.254 (Moldable) | 3D Engineering Design File
Protection Cap Tcf254.254 (Moldable) | 3D Engineering Design File
Ender 3 Pro Spool Holder | High-Quality CAD Model
Ender 3 Pro Spool Holder | High-Quality CAD Model
Whale Bookmark 1 | 3D CAD Engineering Model
Whale Bookmark 1 | 3D CAD Engineering Model
Core Xy 3D Printer | High-Quality CAD Model
Core Xy 3D Printer | High-Quality CAD Model
Chakra Blade Naruto 1 | 3D CAD Engineering Model
Chakra Blade Naruto 1 | 3D CAD Engineering Model
3D Printed Adapter O20 Mm Pvc Pipe To Garden Hose | 3D CAD Engineering Model
3D Printed Adapter O20 Mm Pvc Pipe To Garden Hose | 3D CAD Engineering Model
Drill Bit Holder 5 | 3D CAD Engineering Model
Drill Bit Holder 5 | 3D CAD Engineering Model
Mechanical Direction Reverser with Threaded Design for 3D Printing Applications
Mechanical Direction Reverser with Threaded Design for 3D Printing Applications
3D Printer Sc051 - Phenolic Rails And V Wheels - Downloadable CAD Representation
3D Printer Sc051 - Phenolic Rails And V Wheels - Downloadable CAD Representation
Box | 3D Engineering Design File
Box | 3D Engineering Design File
3D Printed Art Toy Model for Creative Design
3D Printed Art Toy Model for Creative Design
Ruthex Threaded Inserts for 3D Printed Products
Ruthex Threaded Inserts for 3D Printed Products
Kyg We A 2300 500 Blu 1 | 3D CAD Engineering Model
Kyg We A 2300 500 Blu 1 | 3D CAD Engineering Model
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