What is W3Proxy? - W3Proxy is a service that allows access to websites that may be blocked by corporate or school proxies. It allows anonymous access to sites accessed through the proxy service. Trusted proxies, like W3Proxy, have a strict privacy policy and do not collect information about who is using the service. Many popular sites are accessed through services like W3Proxy such as Myspace, Facebook, Yahoo, Google, Amazon, and many others.