SSL/TLS Certificate Checker
Check any website's SSL certificate, TLS version, cipher strength, and expiration. Identify security issues before they affect your SEO or users.
Why Check Your SSL Certificate?
SEO Impact
Google uses HTTPS as a ranking signal. Invalid or expired SSL certificates can cause ranking drops and browser warnings that scare visitors away.
Security
SSL/TLS encrypts data between your server and visitors. Outdated protocols (TLS 1.0/1.1) or weak ciphers leave your site vulnerable to attacks.
Trust & Conversion
Browser security warnings from bad SSL destroy trust. 85% of users won't continue past a "Not Secure" warning.
Compliance
PCI DSS, GDPR, and HIPAA all require encryption. An invalid SSL certificate can mean compliance violations and fines.
What This Tool Checks
Frequently Asked Questions
What is an SSL certificate?
An SSL (Secure Sockets Layer) certificate is a digital certificate that encrypts data between a web server and a browser. Modern sites use TLS (Transport Layer Security), the successor to SSL. Both establish an encrypted connection to protect sensitive data like passwords and credit card numbers.
Does SSL affect SEO rankings?
Yes. Google confirmed HTTPS as a ranking signal in 2014 and has increasingly prioritized secure sites. Sites without valid SSL certificates show browser warnings that increase bounce rate, further hurting SEO. Chrome marks HTTP sites as "Not Secure."
What does the SSL grade mean?
The grade reflects overall SSL/TLS health. A+ means TLS 1.3 with strong ciphers and no issues. A means fully valid with good configuration. B means minor issues (e.g., certificate expiring soon). C means multiple warnings. F means critical problems like expired or self-signed certificates.
How often should I check my SSL certificate?
Check at least monthly, and set up alerts for expiration. Most SSL certificates expire every 90 days (Let's Encrypt) or annually. Unexpected certificate changes could indicate a security breach.