how to seperate live proxies from dead ones?

I am kinda new to this. I have a list of some 50k proxies but a lot of them seem to not work, how can i seperate alive proxies from dead ones? Is there any program to do this? If yes then can i please have the link?

Just use a program like "XSLAYER PROXY CHECKER", and put the url of the website u would like to crack, or just put "https://www.google.com", tell me if you need more help

use a good proxy checker try searching on google for one