Password Protect PDF: lock and secure your PDF file For Free
How to password-protect a PDF?
With pdfFiller, you can add a password to PDF and protect it in a few simple steps.
Use the Encrypted Folder in the Documents section to add an additional layer of security to your documents with two-factor authentication.
To activate the Encrypted Folder, enter your mobile phone number. Receive an activation code and create and confirm a password for the Folder.
To add documents to the Encrypted Folder, move them from any other folder. Lock the Encrypted Folder by clicking the key icon or wait for it to lock automatically after 10 minutes of inactivity.
Now your documents are securely stored in the Encrypted Folder and won’t appear in My Documents. Access them by entering the password you’ve set.