SSL Checker

TLS configuration affects whether users can connect safely and whether browsers trust a site. Certificate expiry, hostname mismatch, missing redirects, or inconsistent HTTPS behavior can create avoidable outages and security warnings.

• Browsers warn users when certificates are expired, invalid, or issued for the wrong host.
• HTTP endpoints that do not redirect to HTTPS can expose users to downgrade and mixed-content risks.
• TLS settings often change outside application code through load balancers, managed certificates, and CDN configuration.

• Connects to the target over HTTPS and inspects the observable certificate metadata and hostname coverage.
• Checks whether HTTP redirects to HTTPS where applicable.
• Records transport findings that can be verified externally without credentials.
• This scan does not perform a full manual TLS assessment or private infrastructure review.

• Certificate common name or subject alternative names do not cover the scanned hostname.
• Certificate is expired or close enough to expiry that renewal should be checked.
• HTTP remains available without redirecting to HTTPS.
• HTTPS works on one hostname but fails on another production alias.
• HSTS is absent even though the site is intended to be HTTPS-only.

• Renew or reissue certificates through your certificate authority, CDN, or hosting platform.
• Confirm that every production hostname is included in the certificate subject alternative names.
• Enable HTTP-to-HTTPS redirects at the edge before application routing when possible.
• Add HSTS after confirming HTTPS is stable for the apex domain and required subdomains.