To merge different PDF files into one and perform other operations in a few steps, try using the PDF manager tool. It is the best tool to perform multiple PDF operations like Split, Merge, Protect, Unlock, Extract, and Convert PDF Files. It is the one-stop solution for all your needs related to PDF files. Moreover, If you are from a non-tech background, you can handle this tool easily. It is because the software comes with a self-descriptive interface.