Find Hidden Subdomains,
Instantly.
The essential tool for bug bounty hunters and security researchers. Discover hidden subdomains quickly and easily, right from your browser.
100% Free & Open Source
Key Features
Everything you need for efficient reconnaissance.
Fast & Efficient Scanning
No API keys, no configuration. Get results in seconds.
Clean, Modern Interface
An intuitive UI designed for focus and productivity.
Export & Copy Results
Easily export your findings or copy them with a single click.
Active Domain Status
Quickly see which subdomains are live and responding.
Privacy First
No data collection, minimal permissions, and open source.
Secure by Design
Built with security in mind, with no external dependencies.
Simple to Use
Get started in three easy steps.
Click the Icon
Open the extension from your browser’s toolbar.
Enter Domain
Input a domain or use the one from your current tab.
Scan & Discover
Click “Scan” to see the results appear instantly.
Ready to Start Discovering?
Level up your security research and bug bounty hunting. Add Subdomain Finder to your toolkit today.
