What is a FLAC file?
Lossless audio compression - CD quality at half the size
Free Lossless Audio Codec file (FLAC) is an audio format similar to MP3, but lossless. What does this mean? The audio in a FLAC file is compressed without any loss in quality, whereas a MP3 file compresses the audio but usually lowers the quality of the file by excluding certain frequencies. A FLAC file works similar to how a ZIP file is compressed. Since FLAC is highly optimized for audio, you’ll receive a better compression ratio when compared to the ZIP compression algorithms. You can play compressed FLAC files in your favorite media player (including VLC, your car, or home stereo, or computer) just like you would an MP3 file (without having to uncompress it separately).
FLAC files are one of the fastest and most widely supported lossless audio codecs and is one of the few that are non-proprietary and has a well-documented open-source reference implementation. There are no attached patents for FLAC files. It was developed in 2000 and FLAC files discourage developers to not include any DRM features.
Common uses for FLAC files
- Audiophile music collections
- Music archiving
- High-fidelity audio
- Lossless music streaming
- Bandcamp downloads
- HD music stores
- Audio archivists
- Tidal streaming rips
Who works with FLAC files?
Oral historians, university and library digitization teams, and field researchers rely on FLAC to preserve interviews and recordings as archival masters, since the compressed file decodes bit-for-bit identical to the original. Podcast producers, radio engineers, and mastering studios also keep FLAC versions of episodes and sessions so they can re-edit or re-export later without generational quality loss.
FLAC vs WAV: which should you use?
Both FLAC and WAV are lossless, but WAV stores audio uncompressed while FLAC compresses it to roughly half to two-thirds of the size with no change to the decoded audio. FLAC also has built-in metadata tagging and per-frame checksums for verifying file integrity, features WAV largely lacks. Choose WAV when working inside recording and editing software that expects raw PCM; choose FLAC for long-term archiving, distribution, or uploads where smaller files save storage and transfer time.
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