192 free tools

TLS Checker

Check which TLS versions (1.0 to 1.3) a server accepts, which cipher it uses and whether old insecure versions are still on. Free.

How to use TLS Checker

  1. Enter a domain.
  2. We try TLS 1.3, 1.2, 1.1 and 1.0 and read the negotiated cipher and certificate.
  3. Turn off TLS 1.0/1.1 if they're still accepted.

Good to know

  • Our server fetches the page for you (browsers block reading other sites directly). Only public websites can be checked — private and local network addresses are refused.

Privacy

Your file or request is processed on our server, then deleted as soon as the result is sent back. Nothing is kept or shared.

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