Why your TLS configuration matters
TLS (the successor to SSL) is what puts the padlock in the browser and encrypts traffic between your users and your servers. But "has a certificate" is not the same as "configured securely." Outdated protocols, weak ciphers, and certificates that are about to expire all create real risk, and they're invisible until something breaks or an attacker exploits them. This free checker inspects your domain's TLS setup and flags the issues that matter.
Protocol versions matter most. TLS 1.0 and 1.1 are deprecated and carry known weaknesses; modern sites should serve TLS 1.2 and 1.3 only. Supporting old protocols for "compatibility" leaves you exposed to downgrade attacks.
Certificate expiry is the most common self-inflicted outage in tech. An expired certificate throws a full-page browser warning that scares away every visitor and breaks API integrations instantly. Knowing your expiry date, and automating renewal, is basic hygiene.
Certificate chain and trust issues (missing intermediates, name mismatches, self-signed certs in production) cause hard-to-diagnose failures on some clients while working on others. Cipher strength and forward secrecy determine whether recorded traffic could be decrypted later if a key is compromised.
This checker runs the same TLS module used in the full NEL VEIL assessment. The complete scan grades 17 modules, including email authentication, security headers, exposed ports, and cloud misconfigurations, into a single 0-100 Veil Posture Score, and connects you with identity-verified professionals for fixed-price remediation when something needs fixing.