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F3D vs 3D Model Viewer: catalog facts
F3D	3D Model Viewer
Free Free and open source.	Free Free and open source under the MIT licence.
Web	Android
Opens many 3D and CAD formats in one viewer Gaussian splatting and volume rendering support	Opens OBJ, STL and DAE files Readable source code useful for learning OpenGL
A viewer, not an editor Minimal interface with few editing features	Deliberately basic feature set Viewing only, no editing
Downloadable app, Web application	Downloadable app
Open source	Open source
License not stated	License: MIT
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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