TLS Version Checker

Paste text mentioning TLS versions and see which versions appear and which are old.

Runs in your browser. Nothing is uploaded — your input is processed on this device and discarded when you close the tab.

TLS Version Checker

How to use this tool

  1. Enter your values in the fields above.
  2. Press Generate to see the result.
  3. Use Load sample to try the worked example, Copy result to copy it, or Clear to start again.

Worked example

Text mentioning TLS 1.0, TLS 1.2 and TLS 1.3 gives 3 versions mentioned with 1 old version flagged.

What this tool does not do / Limits

This checker only reads the text you paste. It does not connect to a server, test a handshake, or prove which versions a server really supports.

Frequently asked questions

Does this scan my server?

No. It only analyses pasted text, so it cannot confirm a live server's configuration.

Why are TLS 1.0 and 1.1 flagged?

They are old protocol versions with known weaknesses, and current guidance is to avoid them where possible.

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