You can clear all the messages of a single chat or all chats at once on WhatsApp.
Here is how you can clear all the messages of a single chat at once:
That's it. All done.
If you want to delete all messages from all chats at once, then follow the below steps:
Delete media from my phone - Select this option if you want the media from all the chats to be removed from your phone.
Clear All Messages - Clear all the messages from all the chats at once.
Cancel - Close this confirmation popup.
Clear All Except Starred - Clear all the messages from all the chats at once except the starred messages.
That is all. All done.
I hope that this post is useful to you. If it is, share this post with your friends.
How to Clear All Messages on WhatsApp