This is where Print Friendly PDF comes in handy. All you need to do is copy the url and paste it into where it says enter a url. You just wait for a pop up and download your PDF to save to your computer.
Some websites/bloggers already have this option available for their posts which is great but some don't. This is something I stumbled across, probably from a Facebook post, which I find very useful for copies of freebie patterns that I wish to keep. It gets rid of all that extra unnecessary stuff like ads.
That being said not all websites work with this print friendly option. Pictures may be missing or it may just not work. It's hit and miss but it does come in handy.