Whatsapp on your PC

https://web.whatsapp.com/

1) On your mobile open "Whatsapp" - (New chat, New group, New broadcast, WhatsApp Web, Contacts, Settings, Status)

2) Click WhatsApp Web

3) Open Your browser on your PC https://web.whatsapp.com/  (it displayed qr code)

4) Your mobile scanned the qr code and ok. then add all friends on your PC.