Detect TLS 1.0, 1.1, 1.2, 1.3 support on any host. Free TLS version checker.
The TLS Version Checker connects to a host and reports which TLS protocol versions are supported (1.0, 1.1, 1.2, 1.3). Use it to confirm that old versions are disabled for security, to debug handshake failures, or to verify PCI DSS or policy compliance. The tool typically tries each version and reports success or failure. Prefer TLS 1.2 or 1.3; 1.0 and 1.1 are deprecated.
They are deprecated and have known weaknesses. Browsers and standards recommend TLS 1.2 or 1.3 only.
Upgrade your server or load balancer to support at least TLS 1.2. Check your web server or CDN documentation.
Version and cipher support are separate. Use a cipher suite analyzer to see which ciphers are negotiated.
Most checkers use 443. Some tools allow specifying a port for non-standard setups.
Yes. TLS 1.3 is faster and more secure. Enable it alongside 1.2 for compatibility.