Check the SSL status and information of a domain.
The SSL checker connects to a domain over HTTPS and reads its SSL/TLS certificate: who issued it, which domains it covers, when it starts and when it expires. Paste a full URL and the domain name is extracted automatically.
HTTPS is a ranking signal, and browsers show a full-page warning when a certificate is invalid or expired. Checking your certificates regularly prevents the lost traffic and trust that an expired certificate causes.
See whether the certificate is valid right now.
Know exactly how many days are left before it expires.
Find out which certificate authority issued it.
List the domains and subdomains included in the certificate.
An SSL/TLS certificate proves the identity of a website and enables the encrypted HTTPS connection between the browser and the server.
Browsers show a security warning and most visitors leave. Automated renewals, like the ones from Let's Encrypt, avoid this.
Yes. HTTPS is a lightweight ranking signal, and an invalid certificate can stop users and crawlers from reaching your pages.
Yes, if both are used. A certificate has to cover every host name that serves your website.