SSL Certificate Checker
Verify SSL certificate validity, expiration, and configuration
Why Check Your SSL Certificate?
SSL/TLS certificates are essential for website security. They encrypt data between your visitors and your server, protecting sensitive information. An expired or misconfigured certificate can lead to:
Browser Warnings
Visitors see "Not Secure" warnings
Lost Traffic
Users abandon sites with certificate errors
SEO Penalties
Search engines prefer HTTPS sites
Security Risks
Data can be intercepted by attackers
What We Check
- Certificate validity and trust chain
- Expiration date and days remaining
- Issuer and certificate authority
- Subject Alternative Names (SANs)
- TLS version support (1.2, 1.3)
- Key strength and algorithm
Frequently Asked Questions
Enter your domain name in our SSL Checker tool to verify your certificate's validity,
expiration date, issuer, and configuration. The tool checks if the certificate is
properly installed, trusted by browsers, and not expired.
It's recommended to renew your SSL certificate at least 30 days before expiration.
Certificates from Let's Encrypt typically last 90 days, while commercial certificates
can last 1-2 years. Use our SSL Checker to monitor your certificate's expiration date.
Your website should support TLS 1.2 and TLS 1.3. TLS 1.0 and 1.1 are deprecated and
should be disabled due to known security vulnerabilities. TLS 1.3 offers the best
security and performance.