SSL Certificate Checker
Diagnose installation properly and check the expiration date of any SSL certificate.
Why Check SSL Certificates?
An SSL (Secure Sockets Layer) certificate is crucial for website security. It encrypts the data between the user's browser and the web server. If your SSL expires, visitors will see a "Not Secure" warning.
Common SSL Errors
- Expired Certificate: The most common issue. Set a reminder 30 days before expiration.
- Name Mismatch: The certificate is issued for
www.example.combut the site is loaded asexample.com. - Untrusted Authority: The certificate is self-signed or not signed by a trusted Root CA.