.FXCB File

File extension fxcb is mainly associated with the Crysis, a 3D action shooting computer game by CRYTEK, and used for one of its default file types.

A .fxcb file represents shader cache. It is where the already compiled files are held, and used. By deleting the cache, you force the game to rebuild them while loading.

How to open:

It does not appear possible to manually access this file type, it is generated by the game when loaded.

How to convert:

Cache files are generally not meant to be converted to anything else.