SSL Certificate Checker
Check the SSL/TLS certificate status of a domain
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Checking SSL certificate...
Certificate Information
Encryption Details
Included Domains (SAN)
Certificate Chain
What is an SSL Certificate?
An SSL (Secure Sockets Layer) certificate is a digital certificate that encrypts data between a website and its users to ensure secure communication. It enables the HTTPS protocol to protect sensitive data such as personal and payment information. This tool lets you check a domain's SSL certificate status, expiration date, issuer, and encryption level at a glance.
Certificate Types Explained
- DV (Domain Validation): A basic certificate that only verifies domain ownership. Quick to issue and inexpensive.
- OV (Organization Validation): A certificate that verifies the organization's identity. Recommended for business websites.
- EV (Extended Validation): A certificate with the strictest validation. Recommended for financial and e-commerce sites.
Frequently Asked Questions
When an SSL certificate expires, browsers display a "This site is not secure" warning. This can cause visitors to lose trust and negatively impact SEO rankings. Be sure to renew before expiration.
Free certificates like Let's Encrypt are DV type and only verify domain ownership. Paid certificates are OV/EV type and offer additional benefits such as organization verification, warranty, and technical support. The encryption level is the same.
SAN (Subject Alternative Name) is a list of domains protected by a single SSL certificate. For example, example.com and www.example.com can be protected with one certificate. Wildcard certificates (*.example.com) are also included in SAN.