Clearing a chat allows you to clear all messages inside a chat. The chat will still be listed in your chats tab.
Clear an individual or group chat
- In the Chats tab, swipe left on the individual or group chat you want to clear.
- Tap More > Clear Chat.
- Tap Delete all except starred or Delete all messages.
Clear all chats at once
- Go to WhatsApp Settings > Chats > Clear All Chats.
- Enter your phone number > tap Clear All Chats.