FLAC is a widely used lossless audio format developed by Xiph.org Foundation. According to the official site, FLAC stands for Free Lossless Audio Codec. Xiph.org claimed that the FLAC audio format does not reduce the audio quality.
Basically, FLAC is a ZIP file for full WAV audio, but with a lower compression rate for the sake of keeping the audio quality as high as possible.
The audio format is open-source and absolutely free. It means that the file format can be used for any purpose and all the source codes are available under open-source licenses. FLAC is intended to be DRM-free. However, because the audio format is open-source, there is a possibility for the implementation of DRM through file encryption.
There are many media players that support the FLAC audio format such as VLC, MPC, and Groove Music. Plus, some audio streaming services also offer lossless audio streaming such as Tidal HiFi, Amazon Music HD, Deezer HiFi, Qobuz, and Spotify HiFi (TBA).
Because of the high audio quality, the size of the FLAC audio file is relatively large. Thus, you need larger storage space as well. The audio format is great for audiophiles due to its high audio quality compared to the other audio formats with compression such as MP3. Playing FLAC audio files via a HiFi system will give a better experience when listening to music.
If you are an audiophile, this file format might suit you, but you need to have a larger storage capacity to store more FLAC audio files. If you don’t care much about the audio quality or just want to save more storage space, the MP3 audio format is good enough for you.