Validate SSL certificates and security configuration for any website.
SSL Certificate Checker
Enter a hostname to check its SSL certificate and TLS configuration.
About SSL Certificates
SSL/TLS certificates are digital certificates that authenticate the identity of a website and enable an encrypted connection. These certificates are essential for securing sensitive information transmitted over the internet.
Why SSL Certificates Matter
Data Encryption: Protects sensitive information during transmission
Authentication: Verifies the identity of the website you're connecting to
Trust: Builds user confidence and improves SEO rankings
Compliance: Helps meet regulatory requirements for data protection
Common SSL Issues
Expired Certificates: Certificates that have passed their validity period
Self-signed Certificates: Certificates not issued by a trusted Certificate Authority
Weak Cipher Suites: Using outdated or insecure encryption methods
Mismatched Hostnames: Certificate issued for a different domain than the one being accessed
Use Strong Keys: RSA keys should be at least 2048 bits
Modern TLS Versions: Use TLS 1.2 or 1.3, avoid older versions
Regular Renewal: Renew certificates before they expire
OCSP Stapling: Improve performance and privacy of certificate validation
Certificate Transparency: Ensure certificates are logged in public CT logs
Security Score
Our SSL checker evaluates multiple aspects of your certificate and TLS configuration to generate a security score. This includes certificate validity, key strength, signature algorithm, protocol version, and cipher suite security. A higher score indicates better protection against potential vulnerabilities.