This tool is used to convert Free Lossless Audio Codec (flac) to MPEG-1 Audio Layer 3 (mp3).

Free Lossless Audio Codec is an audio coding format for lossless compression of digital audio. Digital audio compressed by FLAC's algorithm can typically be reduced to 50–60% of its original size and decompressed to an identical copy of the original audio data.

MP3 is a coding format for digital audio. Originally defined as the third audio format of the MPEG-1 standard, it was retained and further extended—defining additional bit-rates and support for more audio channels.