FLAC

Audiodrome | Last Updated: March 15th, 2026 | 3 min read | Glossary

FLAC stands for Free Lossless Audio Codec, a file format that compresses audio without permanently removing sound data. It is used when you want smaller files than WAV but still want to keep the original audio quality intact.

Quick facts:
Also called: Free Lossless Audio Codec
File type: lossless compressed audio
Common use cases: archiving, high-quality listening, delivery, storage
Not the same as: MP3 or AAC.

Example:
A creator wants to store a high-quality master of a podcast episode without using the larger size of a WAV file. They export it as FLAC so the file stays smaller while preserving the full audio detail.

Gotchas:

  • FLAC is lossless, not uncompressed. It reduces file size, but unlike MP3 or AAC, it does not throw away audio information.
  • FLAC files are usually smaller than WAV, but still much larger than lossy formats like MP3. That makes FLAC better for quality-focused storage than for lightweight web delivery.
  • FLAC is excellent for archiving and high-quality playback, but it is not always the most compatible format for every app, platform, or client workflow.
  • Converting a lossy file like MP3 into FLAC does not improve the original quality. FLAC can preserve quality from that point forward, but it cannot restore detail that was already lost.

FAQs

Yes. FLAC is lossless. It keeps 100% of the audio data. MP3, even at high bitrates, removes parts of the signal.

On high-end gear, yes. Some listeners may hear a difference in transients, harmonics, or stereo imaging.

FLAC has a smaller file size and supports metadata. It’s also easier to archive.

It is useful for archiving, high-quality listening, master storage, and workflows where preserving audio quality matters more than very small file size.

Sometimes, but not always ideally. Many platforms and workflows prefer more widely supported or smaller formats, depending on the use case.

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Related terms:
WAV • MP3 • AAC • Audio File • Audio Export • File Format • Bit Rate