MSN TV (formerly WebTV) is the name of both a thin client which uses a television for display (rather than a computer monitor), and the online service that supports it.

The product and service were developed by WebTV Networks, Inc., a company purchased by Microsoft Corporation and absorbed into MSN (the Microsoft Network). While most thin clients developed in the mid-1990s were positioned as diskless workstations for corporate intranets, WebTV was positioned as a consumer device for web access.

The WebTV product is an adapter that allows a television set to be connected to the internet, primarily for web browsing and e-mail. The setup includes a web browser, cord or wireless (i.e. bluetooth or IRDA) keyboard and connection to the Internet (i.e. using modem, ADSL, cable, PLC).

While WebTV does not allow as much functionality as a computer-based browser, it is a low-cost alternative to a traditional computer connection to the Internet.

It should be noted that the term web TV is also used concerning TV transmissions over the Internet, usually by streaming.