Is it down right now, or is it just you? Check any site from outside your network: whether it responds, with what status, through which redirects - and a timing waterfall showing exactly where the milliseconds go.
check_website, so an AI agent in your browser can run the check and read the JSON back instead of
filling in the form. How it works This check runs from AlertKick's infrastructure, not your machine - so it answers the question your own browser can't. If the check succeeds while your browser fails, the problem is on your side: local DNS cache, VPN, office firewall, or ISP. If both fail, the site is genuinely unreachable from the outside, whatever its own dashboard says from inside the network.
Each phase points at a different suspect. DNS slow: your resolver records or their DNS provider. TCP connect slow: network distance or a struggling host. TLS handshake slow or failing: certificate or proxy trouble - run the SSL checker next. Time to first byte slow: the application itself - the server got the request and took that long to think; databases and cold caches live here. A healthy small site lands under ~500ms total from a nearby region.
If the check fails from here too, the site has a real outage, not a local glitch. The error names the failure mode: a timeout means requests go unanswered (silence, packets dropped); connection refused means a machine answered but nothing is listening on the port; connection reset means something actively killed the connection. Each has its own fix path, covered in three guides: connection timed out, ERR_CONNECTION_REFUSED, and ERR_CONNECTION_RESET. A one-off check only answers "is it down right now"; an uptime monitor repeats it every minute and alerts before users notice.
Note that a 200 OK proves the server answered - not that the page works. Apps serve styled error pages with 200 codes all the time, which is why real monitoring pairs the status check with a keyword check. The website monitoring setup guide covers the full checklist.
A one-off check tells you about now. An AlertKick uptime monitor runs it continuously from multiple locations, requires two to agree before alerting, watches response-time trends and your SSL expiry, and pages you through escalations when it matters. Free.
Monitor this site - free