Is there a way to "scan" a link to a website or page to see if it is a "threat"?

There are some tools you can use.

First is WOT if you don't use it. It gives you a decent indication on whether a site is safe. Its an addon for your browser. Just download for whichever one you use: https://www.mywot.com/en/download Green circle means good, Red means you probably shouldn't go onto the site. Yellow...proceed with caution

Another thing you can do is go here: https://www.virustotal.com/
-Select URL and paste the site address on there. It'll list a number scanners and if they come up clean.