crz to fcz conversion is most likely related to export of character animations, riggings, or similar content between two formats specific to Poser 3d modeling tool.
We have not found any mention of such an export, beyond the fact that both files come from Poser. If you need specific exports or are having difficulty handling these file types, it may be best to reach out to the online Poser / DAZ community for assistance. We have no information about any crz to fcz converter or other software for this.
Updated: February 14, 2024