What is a Wildcard SSL Certificate?
Last Updated: August 20, 2025
A Wildcard SSL Certificate is a single digital certificate that secures a primary domain (e.g., yourdomain.com) and all of its first-level subdomains (e.g., blog.yourdomain.com, shop.yourdomain.com, mail.yourdomain.com). It does this using a wildcard character (*) in the Subject Alternative Name (SAN) field, typically formatted as *.yourdomain.com. It, however, does not secure the root domain (yourdomain.com) unless […]