how to hide chat in whatsapp, WhatsApp itself doesn't provide a built-in feature specifically designed for hiding messages in the traditional sense. However, you can achieve some level of privacy or organization using the following methods:

Archive Chats:

In WhatsApp, you can archive chats to move them out of the main chat list.
On Android: Long press on the chat, tap on the archive icon (box with an arrow) at the top.
On iPhone: Swipe left on the chat, tap on "Archive."
Use Fingerprint/Touch ID or PIN Lock: https://whatsmb.com/

WhatsApp allows you to enable fingerprint or facial recognition/Touch ID on iPhone and Android devices.
You can set up these security features under WhatsApp Settings > Account > Privacy > Fingerprint lock.
Custom Notifications:

Customize notifications for specific chats to hide the content of messages on the lock screen.
On Android: Long press on the chat, tap on the three dots, go to Custom notifications.
On iPhone: Open the chat, tap on the contact's name at the top, go to Custom Notifications.
Third-Party Apps: