Google Chrome Developer Tools
Inspect Element in Google Chrome, possibly known as Developer Tools is an amazing tool that lets you modify CSS and HTML on the fly, and see what it affects. Any web developer, or anyone interested on seeing how the front end of websites are coded should use this tool. Some features Developer Tools provide are CSS Editing, Network Activity Viewing, HTML Editing, Javascript Console, Website Audits and more.
With all of these tools, you won’t have to keep adding debugging code to find out why Javascript isn’t working, or keep messing with CSS to fix an issue, you have a visual view of what everything is doing.
David will walk you through Inspect Element and show you a few features it does provide.
You can get Google Chrome along with the Built-In Inspect Element / Developer Tools at Google Chrome Download