crt

crt is a CLI tool to check Certificate Transparency logs of a domain name. It can also enumerate subdomains.

Installation

From binary

Check the release page for the executables.

From source

If you have Go installed:

go install github.com/cemulus/crt@latest

Usage

Usage: crt [options...] <domain name>

Options:
  -s        Enumerate subdomains.
  -e        Exclude expired certificates.
  -l <int>  Limit the number of results. (default: 1000)
  -o <path> Output file path. Write to file instead of stdout.
  -json     Turn results to JSON.
  -csv      Turn results to CSV.

Examples:
  crt example.com
  crt -s -e example.com
  crt -csv -o logs.csv -l 15 example.com
  crt -json -o logs.json example.com

Examples

License

Apache License 2.0