Open the Facebook app or website
Go to your profile
Select the photo you want to make private
Click or tap the three dots menu
Choose Edit privacy or Edit audience
Select Only me
Save the changes
Repeat for each photo you want to hide
To change album privacy, open the album
Click or tap the three dots menu on the album
Choose Edit
Set the audience to Only me
Save the album settings
To control future photos, go to Settings and privacy
Open Settings
Select Privacy
Adjust who can see your future posts to Only me or Friends
Review tagged photos in Timeline and Tagging settings
Turn on review for posts you are tagged in if needed