Combine PDF is a free tool to merge multiple PDF documents into one PDF file. The tool allows you to choose any number of PDF files to merge, and it is compatible with Windows. Once the files have been merged, you can save them to your device or send them to your friends via email or social networks. It is very easy to use, and it has a simple interface.

In order to use the tool, you need to install it on your device. The installation process is quite easy, and it only takes a few minutes. Once the tool is installed, you can start using it right away.