Fiddler is one of the most powerful Web debugging tools that can record HTTP and HTTPS requests from all clients and servers, allowing you to monitor, set breakpoints, and even modify input and output data. The use of Fiddler is a great help both for development and for testing.
Firebug is a plugin under Firefox, can debug all the website language, such as HTML,CSS, but firebug most attractive to me is the JavaScript debugging features, very convenient to use, and can be used in a variety of browsers (Ie,firefox, Opera, Safari). In addition, other functions are also very powerful, such as Html,css,dom's view and debugging, the overall analysis of the website and so on. In short, a complete set of powerful Web development tools. And then there's the software for open source.
Wireshark (formerly known as Ethereal) is a network packet analysis software. The function of the network packet analysis software is to retrieve the network packet and display the most detailed network packet information as far as possible. Wireshark uses WinPcap as an interface to exchange data messages directly with the network card.
HttpWatch is a powerful web analytics tool. Integrated in the Internet Explorer toolbar. Includes a Web page summary. Cookies Management-cache management-Message hair Send/accept. Character query. POST data and Directory management features. Report output. HttpWatch is a piece of software that collects and displays deep information. It does not use a proxy server or some sophisticated network monitoring tools, it can display the Web page both request and response log information. You can even display exchange information between the browser cache and IE. Integrated in the Internet Explorer toolbar. [1] Only need to select the appropriate website, the software will be able to the site and IE needs to respond to the communication situation analysis and display their corresponding log records on the same interface. Each HTTP record can analyze its Cookies, message headers, character queries and other information in detail. Support for HTTPS and Analysis report output in XML, CSV and other formats where: Fiddler/firebug/httpwatch can be integrated in the Firefox browser
Web Debugging Tools