Free monitoring tools
Check a service, domain, or URL without creating an account.
Domain Coverage Wizard
Discover the uptime, DNS, domain, basic SSL, critical endpoint, and upstream dependency monitors your domain needs.
SSL Certificate Check
Check certificate expiry, hostname validity, the served chain, and basic TLS health.
Status Checker
Run one website check and review the HTTP status, DNS result, certificate validity, and response time.
DNS Lookup
Look up A, AAAA, MX, NS, TXT, CNAME, and SOA records for a domain.
WHOIS Lookup
Look up domain registration, registrar, creation date, expiry, and nameserver information.
Response Time
Measure HTTP response time, TTFB, DNS resolution, and TLS handshake for any URL.
SLA Calculator
Convert SLA uptime percentages to allowed downtime per day, week, month, and year.
Downtime Calculator
Calculate the financial cost of downtime based on your revenue, team size, and SLA penalties.
Status Badges
Live status SVG badges you can drop into a README or status page.
Outage Map
Review current provider incidents, ServiceAlert detections, and validated network-routing events.
Check once, then monitor what matters
Every tool here works without an account. Use the status checker for one URL, or run the coverage wizard to turn a domain into a practical monitoring checklist.
When a one-time result needs ongoing coverage, compare the monitoring plans and review the available alert integrations.