PDF Unlock & Lock

Nowadays, PDF is the most used file format for storing and sharing documents. That's because PDF files have a couple of advantages over other document types. For example, they take up less hard disk space, can be opened using a very small application and they cannot be modified. But the problem is that some users may want to restrict the possibility of a user to copy the contents of a PDF file into the Windows clipboard. In this case, the best idea is to lock the file with a password, for making it impossible to copy or print by unauthorized users. But a question arises: how to do that. The best solution to this question is the PDF Unlock & Lock application.

You can guess what this program is about just by looking at its name. It's a simple Windows software for easily locking and unlocking PDF files using a single mouse click. It's much easier to lock PDFs with PDF Unlock & Lock than with Adobe Acrobat, the popular application for editing and creating PDF documents.

PDF Unlock & Lock is very simple to install, as a couple of clicks are enough to get the program into your system. After installing and running the application, the user will be presented with a simple and graphical interface which allows the user to lock and unlock PDFs using a single mouse click. Several PDF documents can be locked and unlocked at the same time.

When locking a PDF file, the user can select various restrictions to be applied to the locked file. There are two types of passwords that can be set, a owner and a user password. Setting both of them will make the document impossible to be modified by unauthorized users.