The "SysTools PDF Split & Merge" software to divide large PDF files into smaller PDF files. The tool can also combine multiple small PDF files into a large PDF file. Also, it can combine multiple small PDF files into a large PDF file. The final divided PDF file pages will be saved in the sequential manner as the pages were numbered originally this ensures that the original data is kept intact including all the images, text, etc. The software can split the PDF files in a customized manner that is by specifying the odd, even and range of the page. When the user selects the Split by odd option, Then the software will split all the pages with odd numbers. When the user selects the option to split by range. Then, the user has to provide range of page numbers and then the specific pages with the page numbers will be Splitted out. All the final splitted files are saved to a new location. The software with all the latest PDF File formats. The software requires Adobe reader 11.0 on the computer system. Also, The software is compatible with the windows 10 Operating System & performs effectiely and efficiently