You can view a profile picture in HD without any software by manipulating the URL.
A common DIY trick involves changing the www in a profile's URL to mbasic (e.g., mbasic.facebook.com/username ). This loads the legacy mobile version of the site, which sometimes allows users to right-click and save the profile picture in a larger format. Popular Facebook Profile Picture Viewer Tools (2024–2026) How to Utilize Facebook Profile Lock on Android and iOS facebook profile picture viewer