About Is This Site Down?
Is This Site Down? answers a simple question: when a site won't load, is it actually down — or is it just you?
How it works
When you check a website, our server makes a request to it from an independent location. If the site responds, it's up, and any trouble you're having is most likely local — your connection, DNS, browser, or network. If our server can't reach it either, the site is probably down for everyone.
About the results
Some sites block automated requests, sit behind a CDN, or respond differently by region, so a result is a strong signal rather than an absolute guarantee. We check over HTTPS first and fall back to HTTP, and we treat any response below a server error (HTTP 5xx) as "up".
Our checker identifies itself with the user agent
IsItDownBot/1.0. If you operate a site and don't want it checked,
you can block that agent.