Secure your new PDF
When you save and create your PDF within Preview, you will be given the option to password-protect your document. Doing so will encrypt the file and ensure that anyone wanting to access its content will have to enter a password first. You will also find two other options. These allow you to prevent any unauthorised copying of the text and images in the PDF and prevent the file from being printed without a document. Adding security is useful if you’re looking to share your PDF.
The Portable Document Format, more commonly known as PDF, is a universal and well-used standard. It allows content to be neatly packaged into a compact and portable format. The files are also easily shared and viewed by others, with the additional benefit that you can password-protect PDF documents that contain private information.