SSL Certificate Checker
Analyze SSL/TLS certificates and security configuration
Check SSL Certificate
Analyze security, expiry, and certificate chain
How to Use
- 1 Enter the domain name you want to check (e.g., example.com)
- 2 Click "Check SSL" to analyze the certificate
- 3 Review the security grade and certificate details
- 4 Check the certificate chain for proper configuration
- 5 View expiry date and set reminders if needed
What You Get
Comprehensive SSL/TLS certificate analyzer that checks certificate validity, expiry dates, certificate chain, and supported protocols (TLS 1.3, 1.2). Provides a security grade similar to SSL Labs but faster.
Input: google.com
Output: Grade A+ | Valid 365 days | TLS 1.3 ✓ | Chain: 3 certs
Input: expired-domain.test
Output: Grade F | Certificate expired | Security warnings
Input: self-signed.test
Output: Grade C | Self-signed certificate | Not trusted by browsers
How do I check if a website has a valid SSL certificate?
Enter the domain name in our SSL checker and click "Check SSL". The tool will connect to the website and analyze its SSL/TLS certificate, showing you the validity dates, security grade, and any issues with the certificate configuration.
What does the SSL security grade mean?
The security grade (A+ to F) reflects the overall security of the SSL/TLS configuration. A+ means excellent security with modern protocols and valid certificates. Lower grades indicate issues like expired certificates, weak protocols, or missing security headers.
How do I check when my SSL certificate expires?
Our SSL checker shows the exact expiry date and days remaining for any certificate. Enter your domain name, and you will see "Valid until [date]" along with a countdown of days remaining before expiration.
What is a certificate chain and why does it matter?
A certificate chain connects your SSL certificate to a trusted root certificate authority (CA). If the chain is incomplete or broken, browsers will show security warnings. Our tool verifies the complete chain from leaf certificate to root.
Is this SSL checker as accurate as SSL Labs?
We check the same key security factors including certificate validity, chain completeness, and protocol support. Our checker is significantly faster (seconds vs minutes) while providing the essential security analysis developers need.
What TLS versions should my server support?
Your server should support TLS 1.3 (newest, most secure) and TLS 1.2 (widely compatible). TLS 1.1 and older (TLS 1.0, SSL 3.0) are deprecated and should be disabled for security.
What is HSTS and why is it important?
HSTS (HTTP Strict Transport Security) tells browsers to always use HTTPS. It prevents downgrade attacks and cookie hijacking. Note: HSTS is sent via HTTP headers, not the TLS handshake, so it requires a separate HTTP request to check.
Is this SSL checker free to use?
Yes, 100% free with no limits. Check unlimited domains, no signup required. All processing happens server-side for accurate results, and we do not store or log any domain data.
Domain checks require server-side processing to establish TLS connections. We do not store or log checked domains.