It's up! Know if you're down in a click.
Is it up?
Paste any URL to see if the site is up or down. We validate and ping it server-side, following redirects and handling timeouts.
How it works
We normalize your input into a proper URL (accepting http/https, subdomains, all TLDs, IPs, localhost, and full paths), then issue a HEAD request. If the server doesn’t support HEAD, we retry with GET, following up to 8 redirects and timing out after 8 seconds.
We consider the site up if it responds with a successful status, or a response like 401/403/429 (which indicates the host is alive but restricted). Network/DNS errors, timeouts, or 5xx typically count as down.
FAQ
Why does a site show as up even with 403? The server responded, so it’s reachable; it just denied access. That’s different from being offline.
Could results differ from my location? Yes. Firewalls, CDNs, geo-blocking, and DDoS protections can make results vary by region.