You may remove multiple photos using both the Facebook website and the official Facebook app for Android, iOS, and Windows Phone devices. In all situations, deleting an entire album is the only method to delete many pictures.
On Facebook, you cannot select and delete multiple images in one go. One method to get rid of a lot of photographs is to remove an album. You can only remove photos that you submitted to Facebook or albums that you made. A photo that you did not upload will not be removed.
Tap in the bottom right corner of Facebook, then your name. Scroll down and select Photos from the drop-down menu in the top right. Tap Albums in the upper right corner to go back to the album lists. Go to the album you wish to remove. Tap Edit Album in the top right corner, then Delete.
You can then do any of the following: Select all or untag one or more pieces of content by tapping on the circle to the left of each item. To select all of your activity logs, go to the top left and choose Select All. To remove tags from you, tap Remove Tags in the lower right corner.