FBX is common in character, rigging and game-asset pipelines. Reviewing animation often means waiting for a DCC application or engine to load a project, even when the immediate question is simply whether a clip or rig behaves as expected.
3D Viewer Pro narrows that loop. Open the asset, inspect the geometry and material view, then use the animation controls to play the clip, step frames and inspect skeletal motion. The result is a visualization and review tool, not an animation editor.
The asset is parsed on the Windows device. This keeps quick reviews local and avoids sending proprietary animation data to an online converter.