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SSL/TLS Checker

Nivaronix is a certificate and configuration checker: point it at a domain and it inspects the SSL/TLS certificate the same way a browser would, then reports certificate expiry, hostname match, trust, and protocol version issues in plain language.

This is not a penetration test and it does not scan for exploits or CVEs. It checks the certificate and TLS configuration a server presents on a normal connection.

Run a free SSL/TLS scan

What it checks

  • Certificate expiry

    Flags certificates that have already expired and ones expiring soon, before visitors see a browser warning.

  • Hostname match

    Confirms the certificate's subject and Subject Alternative Names actually cover the domain being served.

  • Self-signed certificates

    Detects certificates that were not issued by a trusted public Certificate Authority.

  • Untrusted CA

    Flags certificates issued by a Certificate Authority that isn't in standard trust stores.

  • Weak or outdated TLS version

    Checks the negotiated protocol version and flags legacy TLS 1.0 / TLS 1.1 support.

  • Certificate chain issues

    Checks that the full chain to a trusted root is present and correctly ordered, not just the leaf certificate.

How it works

  1. 1. Enter a domain

    Give the checker a hostname you own or manage. No install, no agent, no credentials required.

  2. 2. We connect over TLS

    Nivaronix opens a TLS connection to the domain's public-facing endpoint and reads back the certificate and negotiated protocol version — the same way a browser would.

  3. 3. Results in seconds

    You get expiry status, hostname match, chain validity, and TLS version, each scored with plain-language remediation steps.

Want the full picture, not just SSL?

SSL/TLS is one part of a domain's security posture. Our full website security scanner also checks DNS records and HTTP security headers in the same scan, and rolls every category into the overall security score so you can see where certificate issues rank against everything else.

See the full website security scanner

A scan like this one is a snapshot — it tells you the certificate's state right now, not whether it quietly expires next month. Nivaronix's monitoring platform checks certificates like this on a schedule and alerts you before they lapse.

FAQ

Is this SSL checker free?

Yes. Scanning a domain is free and doesn't require an account.

What does this SSL/TLS checker actually check?

Certificate expiry, hostname match (whether the certificate covers the domain being checked), chain completeness, trust (whether it's signed by a trusted CA or self-signed), and the negotiated TLS protocol version.

How is this different from a security scanner or penetration test?

It's a configuration checker, not a penetration test — it inspects the certificate and TLS setup a server presents on a normal connection, the same way a browser would. It doesn't attempt exploitation or scan for CVEs.

How often should I check my SSL certificate?

A one-off check only tells you the certificate's state right now, not whether it silently expires next month. For ongoing coverage, Nivaronix's monitoring platform checks certificates on a schedule and alerts before they lapse.

Learn more