Why Subject Alternative Names (SANs) Matter for Modern Browsers

Originally published on cert-depot.com . Free, open-source self-signed certificate generator — no signup, keys never stored. Why Subject Alternative Names (SANs) Matter for Modern Browsers The single most common reason self-signed certs stop working in browsers — and the fix. For two decades, SSL/TLS certificates identified themselves via the Common Name (CN) field in the Subject Distinguished Name. Today, browsers ignore it completely. If your certificate doesn't have a Subject Alternative Name