SSL Certificate Checker

Verify SSL certificate validity, expiration dates, and security details. Ensure your website's security certificates are properly configured and up to date.

Enter an HTTPS URL to analyze its SSL certificate. Only HTTPS URLs are supported as HTTP connections don't use SSL certificates.
About SSL Certificate Analysis
Certificate Information
  • Validity Period: Start and end dates
  • Subject & Issuer: Certificate owner and authority
  • Serial Number: Unique certificate identifier
  • Thumbprint: Certificate fingerprint
  • Subject Alternative Names: Additional domains covered
  • Key Usage: What the certificate can be used for
Certificate Chain
  • End Entity: Your website's certificate
  • Intermediate: Certificate authority chain
  • Root: Trusted root certificate authority
  • Trust Path: Complete validation chain
  • Signature Verification: Cryptographic validation
Security Tip: Regularly check your SSL certificates to ensure they haven't expired and are properly configured. Expired certificates will cause browser warnings and prevent secure connections.
Best Practice: Set up monitoring to alert you at least 30 days before certificate expiration to ensure uninterrupted service.