🔒 SSL Certificate Checker

Check HTTPS status, certificate details, redirects, and security configuration for any domain.

We'll attempt to connect via HTTPS and check the SSL certificate. Works best when the site isn't blocking cross-origin requests. Enter just the domain (e.g., google.com) or a full URL.
Try:

Checking SSL configuration...

✅

SSL Certificate Valid

The connection is secure and the certificate is valid.

📋 Certificate Details

🔄 Redirect Chain

📡 Connection Info

✅ Security Checklist

📖 How to Check SSL Manually

  • Browser: Click the padlock icon in the address bar to view certificate details.
  • Chrome DevTools: Go to Security tab → View Certificate.
  • Command Line (OpenSSL): openssl s_client -connect example.com:443 -servername example.com 2>/dev/null | openssl x509 -noout -dates -issuer -subject
  • Check expiration: echo | openssl s_client -connect example.com:443 2>/dev/null | openssl x509 -noout -enddate
  • Check chain: openssl s_client -connect example.com:443 -showcerts

⚠️ Common SSL Issues & Fixes

  • Certificate Expired: Renew with your CA (Let's Encrypt, DigiCert, etc.) and reinstall.
  • Hostname Mismatch: Ensure the certificate covers the domain (check SANs/Subject Alternative Names).
  • Self-Signed Certificate: Replace with a certificate from a trusted CA. Let's Encrypt offers free certificates.
  • Mixed Content: Ensure all resources (images, scripts, styles) load over HTTPS.
  • Weak Cipher: Update server config to disable TLS 1.0/1.1 and weak ciphers.
  • Missing Intermediate: Install the full certificate chain on your server.