Internet Explorer plug-in with powerful features: DOM Inspector: View DOM Tree and modify tags attributs and css attributes on the fly to test your page. HTTP Inspector: View HTTP/S request to check cookies, GET and POST parameters, view server info. Javascript Inspector and Javascript Console: View javascript functions for easier debugging, see Javascript and AJAX code. HTML Validator: Validate HTML code to correct and optimize your code and html size of your page. And many more features: See page cookies, get pixel color on a page, make a page screenshot. Free for personal use.....(free).....