The Wizbrand PDF Protect tool is an online application that allows users to add password protection to PDF (Portable Document Format) files. By setting a password, users can restrict access to the PDF, ensuring that only authorized individuals can view, edit, or print the document. This tool offers a straightforward way to enhance the security of sensitive or confidential information in PDF files, and the protection is applied directly through a web browser without the need for additional software. It is available for free, providing a convenient solution for safeguarding PDF documents.