SSL Checker — Verify Your Certificate Installation
Enter your domain to instantly check your SSL certificate's validity, expiry, chain and common installation problems.
The SSL Checker connects to a domain and analyzes the SSL certificate the server presents: validity, expiry, certificate chain, hostname match and common installation errors. Confirm your certificate works correctly within seconds of installing it.
Frequently Asked Questions
How do I fix an incomplete chain error?
Install the CA bundle (intermediate chain) alongside your certificate. The ca_bundle.crt or fullchain.pem in our free wizard's ZIP provides this.
What does hostname mismatch mean?
The certificate doesn't cover the visited hostname (e.g. the www subdomain). Reissue a certificate that includes both the root domain and www.
How do I get notified before my certificate expires?
Sign in during the wizard and enable reminders; we email you 30, 7 and 1 days before expiry.