Free monitoring tools

Check a service, domain, or URL without creating an account.

Discover the uptime, DNS, domain, basic SSL, critical endpoint, and upstream dependency monitors your domain needs.

Check certificate expiry, hostname validity, the served chain, and basic TLS health.

Run one website check and review the HTTP status, DNS result, certificate validity, and response time.

Look up A, AAAA, MX, NS, TXT, CNAME, and SOA records for a domain.

Look up domain registration, registrar, creation date, expiry, and nameserver information.

Measure HTTP response time, TTFB, DNS resolution, and TLS handshake for any URL.

Convert SLA uptime percentages to allowed downtime per day, week, month, and year.

Calculate the financial cost of downtime based on your revenue, team size, and SLA penalties.

Live status SVG badges you can drop into a README or status page.

Review current provider incidents, ServiceAlert detections, and validated network-routing events.

Use a result once or monitor it over time

These tools are maintained by the team behind ServiceAlert.ai. Every tool on this page can be used without an account.

For scheduled uptime, DNS, domain, and basic SSL checks with alerts, compare the monitoring plans.