SSL Certificate Checker
Check SSL/TLS certificates for any website. View certificate details, expiration dates, issuer information, and identify potential security issues.
Check SSL Certificate
Enter a domain name without https:// (e.g., google.com)
Why SSL Certificates Matter
SSL certificates encrypt data between visitors and your website, protecting sensitive information like passwords and credit card numbers. They also verify your website's identity, building trust with visitors.
Search engines like Google also use HTTPS as a ranking factor, making SSL important for SEO.
Certificate Status Indicators
Frequently Asked Questions
What is an SSL certificate?
An SSL (Secure Sockets Layer) certificate is a digital certificate that authenticates a website's identity and enables an encrypted connection. It's what makes HTTPS possible and shows the padlock icon in browsers.
Why is my SSL certificate showing as invalid?
Common reasons include: the certificate has expired, it's self-signed, the domain name doesn't match, the certificate chain is incomplete, or it was issued by an untrusted authority.
What happens when an SSL certificate expires?
When a certificate expires, browsers will show security warnings to visitors. This can cause visitors to leave your site, damage trust, and potentially expose data if encryption fails.
What are Subject Alternative Names (SANs)?
SANs are additional domain names covered by a single certificate. They allow one certificate to secure multiple domains (e.g., example.com, www.example.com, api.example.com).