Facebook Messenger is a cross-platform mobile app that allows you to communicate with your Facebook contacts through instant messaging, voice, and video calls.
Facebook Messenger is available for all major mobile OS platforms including
iOS,
Windows Phone, and
Android. Furthermore, it also exists as a web-based client for PC and Mac.
Facebook Messenger is available as a standalone web client, which means that you don’t have to connect to
Facebook to use the service.
Open your web browser, connect to
Messenger and sign up with your Facebook credentials (email address/phone number) and password:

The web client gives you access to the following features: send text messages, make voice and video calls, delete or archive conversations, share content with your friends (documents, photos, GIFs, Emojis, Location…), and manage
message requests.