tlsx
Fast TLS certificate and cipher probing
TLDR
Check TLS
$ tlsx -u [example.com]
Show certificate$ tlsx -u [example.com] -san -cn
Multiple hosts$ tlsx -l [hosts.txt]
JSON output$ tlsx -u [example.com] -json
Check specific port$ tlsx -u [example.com:8443]
Show cipher$ tlsx -u [example.com] -cipher
SYNOPSIS
tlsx [-u host] [-l file] [-json] [options]
DESCRIPTION
tlsx is a fast TLS probing tool that connects to hosts and inspects their TLS configurations, certificates, and supported cipher suites. It can extract certificate details including subject names, Subject Alternative Names (SANs), expiration dates, and issuer information.The tool supports scanning multiple hosts in parallel from a file list, making it suitable for large-scale TLS reconnaissance. Output can be formatted as JSON for integration with other security tools. It is part of the ProjectDiscovery toolkit commonly used in security assessments.
PARAMETERS
-u HOST
Target host.-l FILE
Host list file.-san
Show Subject Alt Names.-cn
Show Common Name.-cipher
Show cipher suites.-json
JSON output.
INSTALL
brew install tlsx
nix profile install nixpkgs#tlsx
CAVEATS
Network access required. Some hosts may block. Go-based tool.
HISTORY
tlsx was created by ProjectDiscovery for fast TLS probing and certificate analysis.