Download the new Odin3_v3.04 a new flasher tool for Samsung Galaxy S III, the successor of Galaxy S2 that has launched around the world. The Odin3_v3.04 is the default PC application that can be used to manually install or flash Stock ROM, Kernels, Modems and Custom ROM. If you are an advanced user and an expert of tweaking Galaxy S3 firmware, you need this to enjoy more of your device.
Download Odin3 v3.04
Download Odin3 v3.07
Download Odin3 v3.09
USB DRIVER - Download (You may need it so Odin will work on your computer)
This is also useful to fix soft-bricks by flashing the stock ROM, you can read a full detailed guide on how install Samsung Galaxy S3 Stock ROM here: How to Install Samsung Galaxy S III Stock ROM