Best way to check proxy for speed and anonymity

I usually use iphey.com to check proxy speed and anonymity. It's free and shows if your real IP is leaking.

For deeper checks, try whoer.net—it gives a breakdown of headers and DNS leaks.

Speed-wise, just ping the proxy or use speedtest.net with the proxy enabled. Not perfect, but gets the job done.

Btw, avoid random free proxy checkers—some log your data.