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Domain tools
Website & Hosting Checks
What's running on a domain and whether it's up.
Is This Website Down? Uptime Check →
Check a site from several regions right now.
Free · live now
Who Is Hosting This Website? →
Identify the host behind a domain.
Free · live now
CMS & Technology Detector →
WordPress, Shopify, Wix and the stack behind a site.
Free · live now
Redirect Chain Checker →
Follow 301/302 chains and spot loops.
Free · live now
HTTP Headers Viewer →
Response headers for any URL.
Free · live now
Website Speed Test →
Load time and Core Web Vitals snapshot.
Free · live now
Robots.txt & Sitemap Checker →
Validate crawl rules and sitemap reachability.
Free · live now
Subdomain Finder →
Discover public subdomains of a domain.
Free · live now
Open Port Checker →
Is 25, 80, 443 or 587 open on a host?
Free · live now
Ping & Traceroute →
Reachability and path to a host.
Free · live now