SSL Checker
Check SSL/TLS certificate details for a website, including certificate validity and configuration information, to help troubleshoot HTTPS issues.
This checks the public TLS certificate presented on port 443. It does not perform a full vulnerability scan.
What is SSL Checker?
The SSL Checker helps you inspect SSL/TLS certificate information for a website and investigate common HTTPS configuration problems. Certificate checks can help you identify validity issues, certificate details, and potential deployment mistakes that affect secure connections. Use this online SSL certificate checker when troubleshooting HTTPS setup, website security, or certificate renewals. The results depend on the information the checker can retrieve from the target server.
Why use this tool?
- Check certificate dates and issuer information.
- Investigate certificate-chain or hostname problems.
- Confirm that a newly deployed certificate is visible from the service being checked.
How to use SSL Checker
- Step 1. Enter the hostname you want to inspect.
- Step 2. Run the certificate check.
- Step 3. Review the certificate details and any warnings before making configuration changes.
Common use cases
Important notes
- A certificate can be valid while a site still has other TLS or HTTP configuration problems.
- Always review the hostname, expiry date and certificate chain in context.
More DNS & Website Tools
SSL Checker FAQ
What does an SSL certificate prove?
A trusted certificate helps a browser establish the identity of a hostname and a secure TLS connection; it does not prove that the site's content is trustworthy.