PDFdu Free Online PDF Encryption

Add password protection for restricting permissions, or entirely locking the PDF from any modifications or even require a password to view the document.
Select PDF File
Owner Password
User Password
Permissions

When the user password is set to empty , setting the permissions

Online PDF Encryption

Quickly and easily add restrictions to the PDF encryption, simple and efficient.
Owner password is the administrator password, user password is the password to open the document.
If you do not need a password to open the document, do not set the user password.
The user password is empty, if not to "Allow Printing" tick, then get this document, open the document can be directly viewed, but not printed.

Five steps to encrypt PDF file:

Click Browse button to specify and upload Pdf file.
Enter Owner Password .
Set Permissions.
Click PDF Encryption and wait.
Download the Encryption PDF to your computer or Directly open in your IE browser.