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.

3D Photo Scanning Turntable with Nema 17 Motor Mount
3D Photo Scanning Turntable with Nema 17 Motor Mount
3D Printed Protective Case for Environmental Sensor
3D Printed Protective Case for Environmental Sensor
Filament Spool Holder Cerality K1Max K1C K1 1 | 3D CAD Engineering Model
Filament Spool Holder Cerality K1Max K1C K1 1 | 3D CAD Engineering Model
Hanger Ape 1 | 3D CAD Engineering Model
Hanger Ape 1 | 3D CAD Engineering Model
AC Remote Holder - Secure and Convenient Storage Solution
AC Remote Holder - Secure and Convenient Storage Solution
Raspberry Pi4 Three Section Outer Box 1 | 3D CAD Engineering Model
Raspberry Pi4 Three Section Outer Box 1 | 3D CAD Engineering Model
Mendel Revisited 3D Printer 1 | 3D CAD Engineering Model
Mendel Revisited 3D Printer 1 | 3D CAD Engineering Model
3D Print-in-Place Fidget Rings with Stand for Prototyping
3D Print-in-Place Fidget Rings with Stand for Prototyping
Precision Adjuster Wheel for Fine Calibration Applications
Precision Adjuster Wheel for Fine Calibration Applications
Hello Kitty 3D Model for Design Projects
Hello Kitty 3D Model for Design Projects
Bambu Lab Printer Sign 1 | 3D CAD Engineering Model
Bambu Lab Printer Sign 1 | 3D CAD Engineering Model
Compact Accessory Case for SD Cards and Card Readers on 3D Printers
Compact Accessory Case for SD Cards and Card Readers on 3D Printers
Laser Tree P Da 01 1 | 3D CAD Engineering Model
Laser Tree P Da 01 1 | 3D CAD Engineering Model
One Of Seven | 3D CAD Engineering Model
One Of Seven | 3D CAD Engineering Model
Adapter for Elegoo Mars 5 Ultra Build Plate to Elegoo Mercury X Washing Machine
Adapter for Elegoo Mars 5 Ultra Build Plate to Elegoo Mercury X Washing Machine
Micro Two-Cylinder Steam Engine Model for 3D Printing
Micro Two-Cylinder Steam Engine Model for 3D Printing
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