Diagnose, check, and monitor your websites — no signup required.
Scan SSL, DNS, security headers, open ports, subdomains, email, and more — complete audit in 30 seconds.
Check SSL/TLS certificate expiry, issuer, and chain validity for any domain.
Query A, AAAA, MX, NS, TXT, CNAME, SOA, and CAA records for any domain.
Look up registrar, registration date, expiry date, and days remaining.
Scan 8 security headers (HSTS, CSP, X-Frame-Options, ...) and get an A-F grade.
Check HTTP status codes, response time, server headers, and redirect chains.
Ping any host and measure round-trip time, min/max latency, and packet loss.
Check if a TCP port is open or closed. Quick-select SSH, HTTP, MySQL, Redis, and more.