.FLAC File

File extension flac is commonly related to FLAC lossless audio format. 

FLAC is open-source audio format that uses lossless audio compression - audio is compressed in FLAC format without any loss in sound quality or original data.

FLAC features:

• Lossless
• Fast
• Hardware support
• Seekable
• Streamable
• Error resistant
• no DRM

FLAC file format is freely available and supported on most operating systems, including Windows, Mac OS X (macOS), Linux and mobile phones. Nowadays is defacto standard for lossless audio files.

Mime types:
audio/x-flac

Files with flac extension are used for audio files compressed with the FLAC, aka Free Lossless Audio Codec. FLAC files do not lose any quality with their compression as MP3 do, but they are generally larger. Most modern media players support playback of FLAC files.

How to open:

Most modern media players support the playback of FLAC audio files.

How to convert:

FLAC format is widely supported by many audio converters.