# SSL Checker Check SSL certificate information, validity, and security configuration > Canonical page: https://elysiatools.com/en/tools/ssl-checker - **Category:** Development - **Keywords:** ssl, tls, certificate, security, https, encryption, certificate checker, ssl validation, tls analysis ## Overview The SSL Checker is a professional diagnostic tool designed to verify the status, validity, and security configuration of SSL/TLS certificates for any domain. It provides instant insights into certificate details, chain integrity, and server-side security headers to ensure your web traffic remains encrypted and secure. ## Inputs - **Hostname** (text): example.com - **Port** (number): 443 - **Include Certificate Chain** (checkbox) - **Check Security Configuration** (checkbox) - **Check HTTP Security Headers** (checkbox) ## When to use - Before deploying a new SSL certificate to ensure it is correctly installed and trusted. - When troubleshooting 'Your connection is not private' errors or browser security warnings. - During routine security audits to verify that your server uses modern encryption standards and secure headers. ## How it works - Enter the hostname of the website you wish to analyze in the input field. - Select optional configurations such as including the certificate chain or checking HTTP security headers. - Click the check button to initiate a handshake with the server and retrieve the certificate data. - Review the generated report for details on expiration, issuer, encryption strength, and security configuration. ## Use cases - Validating that a newly installed SSL certificate is correctly recognized by external clients. - Monitoring certificate expiration dates to prevent unexpected site downtime. - Auditing web server configurations to ensure compliance with modern security best practices. ## Frequently asked questions ### What information does the SSL Checker provide? It provides the certificate's expiration date, issuer, subject, public key details, and a validation of the certificate chain. ### Can I check certificates on non-standard ports? Yes, you can specify a custom port number if your SSL/TLS service is running on a port other than the default 443. ### Why is it important to check the certificate chain? Checking the chain ensures that your server is sending all necessary intermediate certificates, preventing trust errors on mobile devices and older browsers. ### Does this tool check for HTTP security headers? Yes, when enabled, the tool scans for essential security headers like HSTS, X-Content-Type-Options, and others to verify your server's security posture. ### Is the SSL Checker tool free to use? 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