Declaimers : this extension is not related in any way to WhatsApp Inc.
Dialer for Whatsapp chrome extension allows you to dial a phone number from your browser directly into the Whatsapp web client or native desktop application installed in your machine . It will work without adding the phone number in your phone contact book.
Easy to use, just click on the extension icon to open up the dialer and type in the phone number you wish to contact, select country code and then click on the dial button.A new Whatsapp conversation window will open with selected contact. Another way of starting a conversion is to highlight or select any number from a web page and then right clicking on the selected text get the "dial" option.