SSL Certificate Checker
Check SSL/TLS certificate details, expiration date, and security status.
Category: Networking
·
v1.0.0
Enter your certificate expiry date to see days remaining.
✓ Use TLS 1.2 or TLS 1.3 (disable TLS 1.0 and 1.1)
✓ Use strong cipher suites (AES-256-GCM, CHACHA20-POLY1305)
✓ Enable HSTS (Strict-Transport-Security header)
✓ Use 2048-bit or larger RSA keys (or ECDSA P-256+)
✓ Configure proper certificate chain (include intermediate certs)
✓ Enable OCSP stapling for faster revocation checks
✓ Redirect all HTTP traffic to HTTPS (301 redirect)
✓ Renew certificates before expiry (automate with Let's Encrypt)
| Field | Description |
|---|
| Version | Status | Notes |
|---|---|---|
| SSL 2.0 | Deprecated | Insecure, must not be used |
| SSL 3.0 | Deprecated | Vulnerable to POODLE attack |
| TLS 1.0 | Deprecated | End of life since 2020, PCI non-compliant |
| TLS 1.1 | Deprecated | End of life since 2020 |
| TLS 1.2 | Recommended | Widely supported, secure with proper cipher suites |
| TLS 1.3 | Recommended | Latest, fastest handshake, strongest security |
About This Tool
This SSL certificate checker retrieves and displays detailed information about a website's SSL/TLS certificate including issuer, validity dates, expiration status, and encryption strength. It is essential for webmasters, DevOps engineers, and security professionals who need to monitor certificate health and ensure websites remain securely encrypted. The tool helps prevent unexpected certificate expirations that could cause browser security warnings and loss of visitor trust.
How to Use
- Enter the domain name or URL of the website you want to check
- Click check to retrieve the SSL/TLS certificate information
- Review the certificate details including issuer, expiration date, and encryption type
- Note any warnings about expiring or misconfigured certificates and take corrective action