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SubExtractor – Subdomain Enumeration Tool

  • Last Updated : 28 Nov, 2021

SubExtractor tool is an automated tool developed in the Python3 Language. This tool has the potential to extract subdomains of the parent domain. Not only these, but this tool can also extract sub-sub domains from a subdomain. This feature makes the tool unique from others. Many sub-sub domains can consist of sensitive data, so knowing the link to the sub-sub domain can expand the scope of the target, and the possibilities of finding the flaw increases. SubExtractor tool is available on the GitHub platform for free and is open-source to use.

Note: Make Sure You have Python Installed on your System, as this is a python-based tool. Click to check the Installation process: Python Installation Steps on Linux

Installation of SubExtractor Tool on Kali Linux OS

Step 1: Use the following command to install the tool in your Kali Linux operating system.

git clone

Step 2: Now use the following command to move into the directory of the tool. You have to move in the directory in order to run the tool.

cd SubExtractor

Step 3: Now use the following command to run the tool and check the help section.


Working with SubExtractor Tool on Kali Linux OS

Example 1: Extracting Subdomains of


We have got the subdomains of the parent domain. We can test these subdomains and find the security flaw in them.

Example 2: Extracting Sub-subdomains of


We have got the sub-sub domains of the sub-domain. Many times a subdomain is also functionalist into the sub-sub domain which is rarely known to users. So we can enumerate and detect these sub-sub domains using the SubExtractor tool/

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