Access https://sss.datafiddle.net/api/v1/reqinfo with your proxy, and check the headers in the page, it the headers contains your real IP or any [proxy] related content, it means not safe, otherwise it is safe.
I'm pretty sure there is no magic behind this page.
Well known resources like browerleaks or whatleaks will show you the same and much more information.
I think a better way to check your headers is to use an IP detection website such as whoer or ip2location. There are plenty of them and usually, they will tell if your proxy is transparent or not.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.