TLS Version Checker

Test and verify supported Transport Layer Security (TLS) protocol versions, cipher suite configurations, and handshake security posture.

Target Domain or Hostname:

Protocol Support Summary:

Ready to check TLS configuration...

Cipher Suites & Handshake Details: Ready

TLS Protocol Reference

TLS 1.3 minimizes handshake latency and removes vulnerable legacy cryptographic primitives, offering robust modern security.

SSLv3, TLS 1.0, and TLS 1.1 have been officially deprecated across modern browsers and regulatory compliance frameworks.

Older protocols like TLS 1.0 and 1.1 contain known cryptographic vulnerabilities susceptible to downgrade attacks and traffic decryption.

Yes. This diagnostic simulator runs locally to verify endpoint configuration criteria and best practice parameters.

AEAD cipher suites such as AES-GCM and ChaCha20-Poly1305 paired with forward secrecy (ECDHE) are recommended for maximum protection.