To lock your Facebook profile in 2025, follow these easy steps: For mobile (Android or iOS):

• Open the Facebook app and go to your profile.
• Tap the three dots (- - - ) icon next to the “+Add Story” button.
• Select "Lock Profile."
• Read the description and tap "Lock Your Profile" to confirm.

For desktop:

• Go to facebook.com and log in.
• Navigate to your profile page.
• Click the three dots icon next to "+Add Story."
• Select "Lock Profile."
• Read the prompt and click "Lock Your Profile."

Locking your profile will restrict what people who are not friends with you can see, such as your posts, photos, and profile picture. If you want to unlock it later, you can follow the same steps to revert the settings.