If your emulator doesn't recognize the file after conversion, the byte order might be wrong. Always ensure you start with a true .z64 file.
The search for “z64 to iso” stems from a common misunderstanding about how cartridge-based games differ from optical disc games. While it is technically possible to wrap a Z64 file inside an ISO container, doing so offers no practical benefit for standard emulation, flash carts, or preservation. z64 to iso