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3D Model Viewer vs Online 3D Viewer: catalog facts
3D Model Viewer	Online 3D Viewer
Free Free and open source under the MIT licence.	Free Free and open source.
Android	Web
Opens OBJ, STL and DAE files Readable source code useful for learning OpenGL	Opens many 3D and CAD formats, including STEP, IFC and FBX Runs in the browser with no install
Deliberately basic feature set Viewing only, no editing	A viewer only, not a modeling tool
Downloadable app	Web application
Open source	Open source
License: MIT	License: MIT
Not stated if an account is needed	No account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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