Overview
This guide compares MP3 and FLAC across the most important criteria to help you choose the right format for your needs.
MP3 is universally compatible; FLAC is lossless but files are much larger.
Head-to-Head Comparison
Audio Quality
MP3: MP3 loses some audio data through lossy compression.
FLAC: FLAC is lossless - identical quality to the original recording.
Winner: FLAC
File Size
MP3: MP3 files are very small (3-10MB per song).
FLAC: FLAC files are large (20-40MB per song).
Winner: MP3
Compatibility
MP3: MP3 plays on every device ever made.
FLAC: FLAC requires modern players - not supported by iTunes.
Winner: MP3
Streaming
MP3: MP3 is the standard for podcast and radio streaming.
FLAC: FLAC is not supported by most streaming services.
Winner: MP3
Archiving
MP3: MP3 is not ideal for archiving due to quality loss.
FLAC: FLAC is the ideal archive format for lossless audio.
Winner: FLAC
Convert Between MP3 and FLAC
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Convert Files NowFrequently Asked Questions
Can most people hear the difference between MP3 and FLAC?
In blind tests, most people cannot reliably distinguish 320kbps MP3 from FLAC. The difference is very subtle.
Is FLAC worth it for casual listening?
For casual listening on earbuds or phone speakers, MP3 at 256kbps is indistinguishable from FLAC for most people.
Does Spotify use FLAC?
No, Spotify streams at up to 320kbps OGG Vorbis. Tidal and Apple Music offer lossless quality.
Can I play FLAC on iPhone?
iOS 11 and later support FLAC in third-party apps. iTunes and Apple Music do not support FLAC.
What is the best bit rate for MP3?
256kbps or 320kbps for music. 128kbps for podcasts and speech content.