Yahoo Messenger will support Hindi (on Android devices only), Chinese, French, German, Spanish and Indonesian. Messenger offers file sending capabilities to its users. Since the software's relaunch, only certain media files can be shared: photos, animated GIFs and videos. Chat was first launched on January 7, 1997, as it was confirmed to be a feature on the very first release of Yahoo! On March 9, 1998, the first public version of Yahoo! In June 2005, with no advance warning, Yahoo disabled users' ability to create their own chat rooms.It also allows album sharing, with multiple media files in one IM. Chat was a free online chat room service provided exclusively for Yahoo! The move came after KPRC-TV in Houston, Texas reported that many of the user-created rooms were geared toward pedophilia.As of December 14, 2012, all public chat rooms on Yahoo Messenger have been shut down as part of a series of features being changed/added/deleted.

Yahoo now no longer provides plugin development SDK. Messenger users could listen to free and paid Internet radio services, using the defunct Yahoo! Yahoo released a preview version of Yahoo Messenger for Windows Vista.

Music Radio plug-in from within the messenger window. It had been designed to exploit the new design elements of Vista's Windows Presentation Foundation and introduced a new user interface and features.

This allowed Yahoo and Windows Live Messenger users to chat to each other without the need to create an account on the other service, provided both contacts used the latest versions of the clients.

It was not possible to talk using the voice service between the two different messengers.

The plug-in also player functionality, such as play, pause, skip and rate this song. It lacked some basic functions such as webcam support, and has since been discontinued.

Yahoo Messenger users are subject to unsolicited messages (SPIM). Messenger is currently available for computers as downloadable software and web software, including both a messenger-only site and Yahoo! Third-party clients could also be used to access the legacy service. Messenger received 1 out of 7 points on the scorecard.

Microsoft has also had talks with AOL in an attempt to introduce further interoperability, but so far, AOL seems unwilling to participate.

Interoperability between Yahoo and Windows Live Messenger was launched July 12, 2006.

These included: On November 4, 2014, the Electronic Frontier Foundation listed Yahoo! It received a point for encryption during transit, but missed points because communications were not encrypted with a key the provider didn't have access to (i.e.