Have built in Print To PDF features. Here are tutorials for each OS.
1. Apple: http://osxdaily.com/2018/02/13/save-webpage-as-pdf-ios-easy/
2. Windows 10: https://www.nextofwindows.com/3-ways-to-save-web-page-as-pdf-in-windows-10
I disabled the link as it's not relevant to the question.
How do I capture / Convert the pages on this site to PDF format.
Moderator note: Off topic link disabled.