SSL Certificate Checker — Check SSL Expiry

Free SSL certificate checker. Check SSL certificate expiry date, issuer, validity, and encryption details for any website. SSL expiry check online.

Check SSL Certificate

How to Use

Enter a domain name (e.g. google.com). URLs with http:// are cleaned automatically.

Click Check. The tool connects to the domain and reads its SSL certificate.

View the validity status, days remaining, issuer, covered domains, and certificate chain.

What is an SSL Certificate?

An SSL (Secure Sockets Layer) certificate encrypts the connection between a website and its visitors. It ensures that data like passwords, credit card numbers, and personal information cannot be intercepted by third parties. Websites with SSL show a padlock icon and use HTTPS. This tool checks whether a domain's certificate is valid, who issued it, when it expires, and which domains it covers — helping you verify that a site is properly secured.

Frequently Asked Questions

What does this tool check?
It connects to the domain over HTTPS and reads the SSL/TLS certificate. It shows the issuer, validity dates, expiry status, domain coverage, protocol version, and certificate chain.
Does it work with any website?
It works with any publicly accessible domain that has an SSL certificate. It will not work with private/internal servers or domains behind firewalls.
What does "days remaining" mean?
It shows how many days until the SSL certificate expires. If the number is negative, the certificate has already expired and should be renewed immediately.
What is the certificate chain?
The certificate chain is the list of certificates from your domain certificate up to the root certificate authority (CA). A complete chain is needed for browsers to trust your certificate.
Why is my certificate showing as expired?
Your SSL certificate may have expired or not been auto-renewed. Contact your hosting provider or certificate authority to renew it. Most providers like Let's Encrypt offer free auto-renewal.

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