This app helps you to debug your Web sites, make sure everything meets the dialog Regulations, and to make more Satisfied visitors.
Also, you can view the source code of your website(s).
In a nutshell with this tool for WebProgrammers You can:
• Debug your websites (via Firebug)
• Check the CSS
• Check the HTML
• Check if they are online
• Check the Source in Plain Text
• Check the Source highlighted
• Learn what HTML Tags do