How to use WhatsApp Widget How to personalice the icon in your WhatsApp Widget How to use WhatsApp Widget You can add your own icon to your WhatsApp Widget. Just use an icon you may want to use. The format should be square. By César Martín (ToChat.be) We develop WhatsApp solutions, WhatsApp API and WhatsApp Widgets. Please contact us for more information. We are here to help you. View all of César Martín (ToChat.be)'s posts.