Free Monitoring Tools
Instant checkers for uptime, SSL, DNS and response time. Use directly in your browser without an account.
Uptime Checker
Instantly check if a site is up. Enter the URL and see the HTTP status, response time, and whether the server is reachable.
SSL Certificate Checker
See the full SSL certificate details for any site: validity, issuer, type, and days remaining before expiry.
Response Time Checker
Measure the response time of any URL from multiple geographic locations. Identify regional slowdowns.
DNS Checker
Query DNS records for any domain: A, AAAA, CNAME, MX, TXT and NS. Detect propagation and configuration issues.
Domain Expiry Checker
Check the expiry date of any domain via WHOIS. Find out how much time remains before the domain expires.
HTTP Headers Inspector
See all HTTP headers returned by any URL. Verify security, cache, and server configuration.
Checking once is not enough
The tools above are one-time checks. To know when your site goes down - any hour, any day - you need continuous monitoring. Zirvo does this automatically.
50 sites free. No credit card. Alerts via email and WhatsApp.