The main purpose of this project is to present the anatomy of a large scale Hypertext Transfer Protocol (HTTP) based Web search engine by using the system architecture of large search engines such as Google, Yahoo as a prototype. Additionally, a web crawler is developed and implemented in Java v1.4.2, which demonstrates the operation of a typical Web crawler. The paper describes in detail the basic tasks a search engine performs. An overview of how the whole system of a search engine works is provided. A WebCrawler application is implemented using Java programming language. The GUI of the developed application helps the user to identify various actions that can take place like specifying the start URL, maximum URLs to be crawled, the way crawling has to be done – breadth first or depth first. This paper also lists proposed functionalities as well as features not supported by the web crawler application.