Go to, or log in to your Gmail account and access Hangouts from there.The simplest way to delete a message history with someone is to access Google Hangouts from your computer. You can only remove entire conversations with a single user or with a group. Also, note that Google Hangouts doesn’t offer the option of deleting individual messages. There is no way to delete messages from someone else’s device. That is to say, even if you delete one, the other participants will still be able to access it. Unfortunately, you can’t delete conversations on both ends.
