SSL Analysis & Certificate Guide
Examine your site's SSL certificate in depth; if something is wrong, find out exactly why and how to fix it, step by step.
Is your site's SSL certificate healthy?
Enter your domain and we'll examine your certificate exactly as browsers see it. If something is wrong, we'll show you the precise cause and how to fix it, step by step.
To see it for your own site, enter your domain above and press Analyse SSL.
Real verification
We test whether browsers actually trust the certificate, using a real TLS validation.
Error diagnosis
If there's an SSL error we name the cause plainly (expiry, chain, domain, self-signed and so on) and give you the steps to fix it.
Chain and encryption
We lay out the certificate chain, TLS version, signature algorithm and key strength.
HSTS and expiry
We track HTTPS enforcement (HSTS) and how many days the certificate has left.