To delete your Grok chat history on grok.com/app and X, open each chat, select...
https://touch-wiki.win/index.php/How_Do_I_Export_Grok_JSON_and_Turn_It_Into_Something_Readable%3F
To delete your Grok chat history on grok.com/app and X, open each chat, select delete, and confirm. Remember, this only removes messages, not files or Imagine media—they need deleting separately