If someone messages you shortly after you update your profile picture or come online, it suggests they noticed the change.
Viewing a profile photo directly inside the app is straightforward. : Tap the contact's name at the top. Tap the icon : Press the round profile picture icon. whatsapp profile picture viewer
Adjusting these settings is straightforward: If someone messages you shortly after you update
If you are worried about others viewing your picture, here is the best fix: whatsapp profile picture viewer
If you are simply trying to view a friend's profile picture in full size without any malicious intent, you do not need a shady third-party app. You can do so using official methods:
Only people saved in your address book can see your photo.