Inspect SSL/TLS certificate health, expiration dates, issuers, validity periods, and covered domains (SANs) instantly.
Secure Sockets Layer (SSL) and Transport Layer Security (TLS) certificates are critical for encrypting data between a web server and a browser. Our instant SSL Checker queries the server directly to extract the active certificate, displaying its issuer, validity period, and covered domains (Subject Alternative Names).
Regular monitoring of certificate expiration dates prevents unexpected website downtime and security warnings. Perfect for system administrators verifying renewals or security analysts inspecting certificate chains.