A GUI tool that checks if URLs are alive or dead using:

• Quick HEAD request with requests
• Full page load test using Selenium (with aggressive timeout to prevent hanging)
• Multithreading for faster scans
• Subfinder integration to collect subdomains automatically

https://www.python.org/downloads/

git clone https://github.com/timdigga/subdomain_alive_checker.git
cd subdomain_alive_checker

pip install -r requirements.txt

Install subfinder

go install -v github.com/projectdiscovery/subfinder/v2/cmd/subfinder@latest

Paste or import URLs into the app. Click Check URLs to start. Results will be shown and copyable.