SSL/TLS Certificate Checker
Verify SSL certificate validity, expiration, protocol version, and cipher strength in seconds. No signup required.
About SSL/TLS Certificates
SSL/TLS certificates encrypt traffic between browsers and servers. An invalid, expired, or weak certificate exposes users to man-in-the-middle attacks and damages trust. Modern sites should use TLS 1.3 with Let's Encrypt auto-renewal.
Learn more in our SSL/TLS certificates guide.
Need the full picture?
Run a complete security audit with 150+ checks, OWASP Top 10, and CVE lookup.
Run Full Scan