Fast and efficient subdomain enumeration tool utilizing crt.sh to identify subdomains recursively.

---

Features 💡

• Fast subdomain enumeration using crt.sh.
• Recursive subdomain discovery.
• Supports input via command-line flags or input files.

Installation 🛠️

To install the crtfinder tool, you can simply run the following command.

go install -v "github.com/yourpwnguy/crtfinder/cmd/crtfinder@latest"

# Do the below step only if your "~/go/bin" is not in PATH
cp ~/go/bin/refine /usr/local/bin/

Usage 📝

Usage: crtfinder [options]

Options: [flag] [argument] [Description]

INPUT:
  -d string[]   Domains to find subdomains for (comma separated)
  -dL FILE      Input file containing a list of domains

FEATURES:
  -r int        For recursively finding subdomains with time gap between requests (default: 5s)

OUTPUT:
  -o string     Output file to store the subdomains

DEBUG:
  -v none       Check current version

But Why Use Our Tool❓

We understand and appreciate there are other tools out there for the same task, but many aren't updated or maintained. Crtfinder gives you more control, speed, and a better user interface. It's regularly updated to ensure reliable performance and modern features for easy subdomain discovery.

Contributions 🤝

Contributions are welcome! If you have any suggestions, bug reports, or feature requests, feel free to open an issue or submit a pull request.