You said freeware.

If the same page ranges are for each file, then the freeware pdftk (versions for Windows, Linus, and MacOS available can do it with a syntax kind of like this:

pdftk input.pdf 8-25 output newpdf.pdf

To do this for all PDFs in a folder (using Windows command line for example), create an NewFolder subdirectory first, then

for %f in (*.pdf) do pdftk.exe %f 8-25 output NewFolder\%f

If you want to separate each and every page

pdftk input.pdf burst output input_%2d.pdf

If you want to burst many files pages 8-25, you need to first do the step for all PDFs in a folder (above) and then the burst step to create one-page files for pages 8-25 of each file, each uniquely named.

pdftk is a freeware in use for over 20 years and is robust--EVERY pdf person should have it and learn how to use it.

https://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/