Down for everyone, or just you?
There's a small ritual every developer knows. A page won't load, and before you panic you ask the one question that decides everything you do next: is it down for everyone or just me? It matters because the two answers send you in opposite directions. If the site is genuinely down, there's nothing to fix on your end and you wait or raise the alarm. If it's just you, the problem is sitting on your side of the wire and no amount of refreshing the real server will help.
The catch is that your own machine is the worst place to judge from. A stale DNS entry, a half-connected VPN, an ISP hiccup, an extension gone rogue, or a cached error page can all make a perfectly healthy site look dead to you and nobody else. That's exactly why 'is it down for everyone or just me' became a genre of tool in the first place — you can't trust the verdict from the one browser that might be the actual culprit.
So here's how to check if a website is down without fooling yourself: hit it from somewhere that isn't your laptop. That's what the checker above does: it sends a fresh request to the URL from our servers, with no cache and none of your local baggage, and tells you what comes back. If it answers for us but not for you, the fault is local — flush your DNS, drop the VPN, try another network. If it doesn't answer for us either, it really is down, and now you know it's the site and not your setup.