Nullsoft Winamp is a fast, flexible, high-fidelity music player for Windows. Winamp supports MP3, CD, Audiosoft, Audio Explosion, MOD, WAV and other audio formats, custom appearances called skins, plus audio visualization and audio effect plug-ins. The Lite version does not play Windows Media or M-Juice audio, nor contain Winamp Visualization Studio.

Winamp is an audio player that can handle audio CDs, MP3 audio files, and streaming audio broadcasts. It combines extensive functionality with an intuitive interface. Winamp features a playlist editor and a 10-band graphic equalizer with user-definable presets that can automatically load specific files. It also includes Windows Media Technology 4.0 input/output support and the industry-standard Fraunhofer MP3 decoder. This download no longer includes VIS/DSP plug-ins; you can download them separately.

Winamp plays MPEG Layer 2 (MP2) and Layer 3 (MP3) audio streams and Windows Media Audio (WMA), and combines extensive functionality with an intuitive interface. Winamp 3 revamps the entire idea of a skinning system by allowing developers to add entirely brand-new functionality within their own skins.