Hey guys! I just came across this site, and figured it’d be useful to others, as well.
You input the URL of your site, and it shows you what it looks like on different screen sizes, to see if you’re page is working responsively. I know you can just resize your browser window to do this, too, but I like how it lays it out. It also helps because sometimes sites look differently when I resize my browser window versus when I pull it up on my cell phone.
Sorry if someone else has posted this before!