TLS Version Checker & Monitor

See which TLS versions your site offers — and get alerted if a deprecated one comes back.

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Every HTTPS connection negotiates a TLS protocol version, and not all of them are safe. TLS 1.0 and 1.1 are deprecated, broken against modern attacks, and fail compliance standards like PCI DSS — yet servers quietly keep accepting them, often because an old config was never cleaned up or a rollback re-enabled them. A TLS version checker shows you exactly which versions your site offers, so you can switch off the dangerous ones and keep only TLS 1.2 and 1.3.

What it checks
  • Which TLS versions your server accepts — TLS 1.0, 1.1, 1.2 and 1.3
  • Deprecated TLS 1.0 / 1.1 still enabled (a compliance and security risk)
  • Whether the modern baseline (TLS 1.2) and latest (TLS 1.3) are supported
  • A clear grade for your protocol configuration
  • Changes to the accepted version set since the last check

Why it matters

Accepting an obsolete protocol undermines every secure connection to your site: TLS 1.0 and 1.1 are vulnerable to known downgrade and cipher attacks, and a single re-enabled version can drop you out of PCI DSS compliance. The danger is that protocol support drifts silently — a server upgrade, a reverted config, a load-balancer change — and nobody notices until an auditor or attacker does. Monitoring turns a silent regression into an immediate alert.

How BrandSentryPro does it

Add your site as a monitor and BrandSentryPro connects to it and probes each TLS version individually, grades the result, and records which versions are offered. It re-checks over time and flags any change — so a deprecated protocol creeping back, or TLS 1.3 disappearing in a downgrade, never goes unnoticed.

Frequently asked questions

Which TLS versions are still safe to use?
TLS 1.2 is the secure baseline and TLS 1.3 is the latest and strongest. TLS 1.0 and 1.1 are deprecated (RFC 8996) and should be disabled — they are vulnerable to known attacks and fail compliance standards.
Why is TLS 1.0 / 1.1 a problem?
They rely on outdated cryptography that is vulnerable to downgrade and cipher attacks, and major standards such as PCI DSS prohibit them. Leaving them enabled weakens security for every visitor and can cause a failed compliance audit.
How do I check what TLS versions my server supports?
A TLS version checker connects to your server and attempts a handshake with each protocol version to see which succeed. BrandSentryPro does this automatically, grades the result, and keeps re-checking so you are alerted if the supported set changes.

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All in one place

Run this check automatically

Add a monitor and BrandSentryPro keeps every check running for you — with alerts the moment something needs attention.

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