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HTTPS & SSL Checker
Enter a domain to check its SSL certificate, expiry date, HTTP to HTTPS redirect and HSTS header.
The certificate is read live from the server on port 443.
About the HTTPS & SSL Checker
An expired or misconfigured SSL certificate makes browsers show a scary warning and drives visitors away. HTTPS is also a small Google ranking signal, so it pays to keep it healthy.
How to use the HTTPS & SSL Checker
- Enter your domain, for example example.com.
- Press Check HTTPS.
- Read the certificate dates, issuer and redirect checks.
- Renew or fix the certificate if anything is red.
Frequently asked questions
What happens when an SSL certificate expires?
Browsers block the site with a security warning until the certificate is renewed.
What is HSTS?
HSTS is a header that tells browsers to always use HTTPS for your site. It is optional but recommended once HTTPS works everywhere.
Why should HTTP redirect to HTTPS?
So visitors and search engines who use the old http:// address end up on the secure version with a permanent 301 redirect.
