foobar2000 offers third-party user interface modifications through a software development kit (SDK).

To maximize audio fidelity in cases where resampling or downscaling in bit depth is required, it provides noise shaping and dithering.

Safe mode allows users to disable all plugins temporarily to debug the issue.

[16] At its core, foobar2000 natively supports a range of audio formats, including MP1, MP2, MP3, MPC, AAC, WMA, Ogg Vorbis, FLAC / Ogg FLAC, ALAC, WavPack, WAV, AIFF, AU, SND, Audio CD, Speex, and Opus.

[21] The client is built with an open component architecture, allowing third-party developers to extend functionality of the player.

Other optional features include playback statistics, CD burning, kernel streaming, ASIO support, WASAPI output compatibility, and a UPnP/DLNA renderer, media server and controller for networking.