PSN code generator is the software which is generating unlimited codes for PlayStation Network. And also you can use that code for Playing the game on PlayStation Network.
Yes, It is very safe. You can use this software unlimited times in a day. But for the Safety We are recommend you to use this 3 to 4 times in a day. This is for your Personal Safety.
Yes, This generator will work with all OS (Operating System). You do not have to face any problem with this generator in any OS. This generator support all the OS.