Rooting Samsung Galaxy S3 I9300

Kingo Root :download here 
Root Genius :download here


Enable USB Debugging on your device.
To enable USB Debugging 
Go to Setting -->> About Phone -->> And Click Several Times on Build Number -->> Go back and Developers Option is Unlocked 

Step 1: Find the desktop icon of Android ROOT and double-click to launch it.

Step 2: Connect your GALAXY S3 I9300 to your computer via USB cable.

Step 3: Click ROOT to start the process when you are ready.

Step 4: ROOT Succeeded! Click Finish to reboot your device.