Web proxies are powered by server-side softwares. These proxies work entirely through a web browser. Usually all that is needed to hide your IP address and surf anonymously is to visit the service's homepage in a web browser and enter a URL (website address) in the form provided. There is no requirement to download or install software or reconfigure your computer. To work, a web proxy must manipulate the document you've requested and all its associated elements and objects. This can be tricky, and not all proxies are as efficient or effective as others. Some services are slow and may produce errors while rendering the many variations of webpage code. But they are popular, numerous, and easy to use.