Built in Browser Util
Gives you a ton of information on webpages, audits, performance measurements, runs diagnostics, able to view all individual content (icons, photos), view source code, script debugger, etc...
Open your browser. I am using photobucket for this demo.
Swipe down from the top on the screen and select the small symbol of a 'Gear' (Options)
Select 'Privacy and Security'
Turn on 'Enable Web Inspector' You will see a small Pop-Up window (See below)
You will then be prompted to set a password
Hit the 'Back' button and open a new tab and enter
http://localhost:1337
Have fun all...