WhatsApp Web is a browser version of the WhatsApp Messenger that allows users to send and receive WhatsApp messages right from their computer. It functions as an extension of the mobile WhatsApp account, and all messages are synced between the phone and the computer, so users can view conversations on any device regardless of where they are initiated. To use WhatsApp Web, users need to scan a QR code with their smartphone to log onto the web version, which authenticates them as the owner of that account. WhatsApp Web can be accessed through a web browser or a downloadable system app for Mac and Windows.