glTF: the web
Compact, modern, color/material aware — ideal online.

These three mesh formats overlap but are not interchangeable. The right choice depends on where the model is going: a browser, a DCC/animation tool, or a simple cross-tool handoff.

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Compact, modern, color/material aware — ideal online.
Rich features for Max, Maya, Blender and engines.
Simple and widely supported for basic interchange.
For browser, real-time and AR/VR, choose glTF/GLB for the best size and fidelity balance.
For animation and game pipelines, choose FBX; for the simplest possible geometry handoff, choose OBJ.
glTF and FBX carry materials well; OBJ supports basic materials via MTL but is more limited.
If color fidelity matters most online, glTF is the safest pick.
glTF/GLB — it is compact and designed for real-time rendering.
FBX is the traditional choice for DCC and game pipelines.
When you just need simple, broadly compatible geometry interchange.