PDF Password Protect is a WordPress plugin designed to enhance the security of PDF files on your website. This tool allows users to set passwords to restrict access to their documents, ensuring that sensitive information remains protected. Key features include the ability to add user passwords to prevent unauthorized access, as well as owner passwords that can disable specific permissions such as copying text, printing, or commenting on the PDFs. The plugin also supports bulk password application, making it efficient for users with multiple files.

In addition to password protection, PDF Password Protect offers functionalities to remove existing passwords and overwrite owner passwords. Users can restrict viewing or downloading of PDF files and even sell WooCommerce downloadable PDFs with unique passwords for each customer. However, it is important to note that the plugin requires the installation of QPDF and GhostScript packages for optimal performance, particularly when handling complex PDF files.