If you ask a modder for a CPK editor, is likely the first name you’ll hear. Originally a command-line tool, it has been wrapped in various graphical user interfaces (GUIs) over the years to make it user-friendly.
To give you the best advice on which tool to download, could you tell me: specific game are you trying to mod? Are you on (like Switch or PS4)? Are you looking to change graphics, audio, or text I can provide a link to the specific modding script of the tool that works best for that title! cpk file editor