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Autodesk Viewer vs Mayo: catalog facts
Autodesk Viewer	Mayo
Free Free to use in the browser.	Free Free and open source.
Web	Windows, macOS, Linux
Opens many CAD formats, including DWG, RVT, STEP and SolidWorks files No software to install	Converts between STEP, IGES, STL and other CAD formats Clip planes, exploded views and measurement
Requires a WebGL-capable browser A viewer only, not an editor	A viewer and converter, not a modelling tool
Web application	Downloadable app
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	No account needed
Needs internet	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.