FLAC (; Free Lossless Audio Codec) is an audio coding format for lossless compression of digital audio, and is also the name of the reference codec implementation. Digital audio compressed by FLAC's algorithm can typically be reduced to 50–60% of its original size and decompress to an identical copy of the original audio data.
Since the introduction of FLAC in 2001, the number of products and services using the format has increased. It is generally supported by more hardware devices than competing lossless compressed formats that may have intellectual property constraints.
FLAC stands for Free Lossless Audio Codec, an audio data compression scheme.
FLAC may also refer to:
- Free Legal Advice Centres, an Irish organization
- Florida Automatic Computer, an early digital electronic computer
- Striplin F.L.A.C., an ultralight aircraft, where the abbreviation stands for Foot Launched Air Cycle