Efficient Subdomain Discovery Tool for Chrome

Slash Mark - Subdomain Finder is a browser extension designed for Chrome that enables users to quickly scan for common subdomains of the active tab's domain using DNS-over-HTTPS. This tool is particularly beneficial for security researchers, developers, and power users who need to identify subdomains associated with the currently open website. With a single click, it conducts a rapid scan to uncover commonly used subdomains and potentially hidden assets related to the active domain.

The extension provides results in a clean and organized interface, allowing for straightforward analysis of a site's online presence. It prioritizes efficiency, privacy, and accuracy, ensuring that all lookups are conducted securely without revealing any browsing activity. This makes it an ideal choice for reconnaissance, bug bounty workflows, and domain analysis during routine web exploration.

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App specs

  • License

    Free

  • Version

    3.8.2

  • Latest update

  • Platform

    chrome

  • Language

    English

  • Developer

Program available in other languages



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Laws concerning the use of this software vary from country to country. We do not encourage or condone the use of this program if it is in violation of these laws.
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Is Slash Mark - Subdomain Finder safe?

100/100

Score result: Clean

This file passed a comprehensive security scan using VirusTotal technology. It is safe to download.

  • Virus free
  • Spyware free
  • Malware free
  • Verified by Security Partners

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Scan Info

Last scan
Monday, November 24, 2025
Scan provider
VirusTotal

Softonic security commitment

Slash Mark - Subdomain Finder has been thoroughly scanned by our advanced security systems and verified by industry-leading partners. This file comes from the official developer and has passed all our security checks, showing no signs of viruses, malware, or spyware.