← Monitoring resources
Free tools
No account needed. Look things up, check an outage, plan an uptime target.
Investigate a domain or IPWHOIS/RDAP, DNS, email security, IP owner, subdomains, security headers and a live uptime check.Open ↗Is it down for everyone?Check a website from 6 regions to see whether an outage is real or local to you.Open ↗Uptime & SLA calculatorTurn an availability target into an allowed downtime budget for a calendar month.Open ↗
Want to know what Investigate covers before you use it? Read the Investigate overview.