Well, this is the official method for using Line on PC free. In this you have to download the official Line App provided by them. Please follow each and every step given below.

Download Line on PC from official website (Links given below)
Now after successful download you need to install it into your Windows or Mac computer
After installation you have to login to your account.
If you don’t have account already then just register new account from the software itself.
You all the previous contacts will automatically be sync into this Line PC version.
Enjoy Friends!

Original Source and Download Links : http://www.downloadappsforpc.com/line-for-pc-download-line-for-computer-free/