About IsItDown
Last updated: 2026-10-11
IsItDown is a free website status checker. When a page will not load and you are not sure whether the problem is the site or your connection, this tool gives you a fast, practical answer: can our servers reach that site right now, and how?
Why a server-side check
A check run inside your own browser can be wrong in both directions: browsers block some responses by design (opaque “no-cors” results), and a site that is fine for everyone else can look broken from one network. So IsItDown runs the check from its own backend on a neutral vantage point. That separates a real outage from a local problem and gives you a second opinion you can share:
- One verdict, everyone the same. A shared status link shows the same server-side result to every visitor, so “is it down for you too?” has a concrete answer.
- Details, not just up/down. The verdict includes the HTTP status, the response time, and which step failed (DNS, connection, TLS or timeout) when the site is down.
- History. The backend keeps the last few checks for each domain in memory, so the page can show a short history chart and the last time the site was down.
What the check does
When a status page loads, this site’s backend attempts an HTTPS connection to the address with an 8 second timeout. If the server answers — with any HTTP status, even an error page — the site is marked up and we show the status code and the round-trip time. If the connection fails — the domain does not resolve, the connection times out, or the TLS handshake breaks — the site is marked down and the verdict names the failing step.
What the check does not do
- It does not run a full crawl or load the whole page.
- It does not monitor a site continuously — results are computed on demand and kept in memory only, resetting on every deploy.
- It refuses private and local addresses (your router, 127.0.0.1, intranet names) so it cannot be used to probe your network.
- It checks from a single vantage point, so a region-specific problem that does not affect our servers will not show up.
Who is behind this site
IsItDown is part of a small collection of free, single-purpose web tools. The sites are built as plain, fast pages that work on phones and desktops alike, and they are kept running with the help of third-party advertising. You can read exactly how advertising and data handling work on our Privacy Policy.
Got feedback?
If something is broken, misleading, or missing, we would genuinely like to know. Reach us at david.castillo.comms.inbox@pm.me or through the contact page.