Introduction - If you have any usage issues, please Google them yourself
Role: enter (multiple) web site or domain name, the time required to test web access.
Can be used for a lot of webmasters site, a one-time query all their sites are available and the loading time.
This is a very useful query system, he rarely spent server resources, each webmaster can collect a.
Risk tip: if you open up an illegal website, your domain name may be recorded and intercepted by security software.