No. Facebook does not notify users who views their profile picture. Any third-party app claiming to show you "visitors" or "HD viewers" is a scam designed to steal your data.

The primary driver behind these viewers is simple: quality. Facebook’s native interface often displays profile pictures in a cropped, lower-resolution format to optimize loading speeds and save data. However, the original files uploaded by users are often significantly higher in quality. HD viewers work by attempting to access the source URL of the image file stored on Facebook's servers, bypassing the front-end scaling. For photographers, digital artists, or anyone who appreciates visual fidelity, the appeal of seeing an image in its intended resolution is undeniable. Navigating the Privacy Gray Area

How higher‑resolution profile pictures are obtained

Here’s a quick breakdown of why most of those tools are misleading or dangerous:

Facebook stores multiple versions of every uploaded image. When you view a profile, the site serves a low-resolution "thumbnail" or a medium-sized preview. HD viewers work by identifying the unique numeric ID

Extensions named "HD Profile Viewer" or "Super Zoom" that ask for permission to "read and change all your data on facebook.com." These are often spyware.