What's the best way to check proxies for reliability and speed? or How do you properly check proxies

Dude, just use Postman or cURL to check proxies manually.

Ping won’t cut it—you need to see if they actually return data.

I also like ProxyFire—it’s old but gold for batch testing.

And yeah, free proxies are usually trash. Spend a few bucks if you’re serious.