FLAC vs MP3
FLAC is a lossless audio format that compresses files to about 50–60% of their original size without dropping a single sample. FLAC keeps the recording exactly; MP3 is smaller and plays everywhere. Archive in FLAC, share in MP3.
audio format comparison
FLAC.flac
FLAC is a lossless audio format that compresses files to about 50–60% of their original size without dropping a single sample.
Pros
- Lossless - decoding produces a bit-identical copy of the source
- About 50–60% the size of an uncompressed WAV for the same audio
- Widely supported by audiophile software and hardware players
Cons
- 2–3× larger than MP3 or AAC at comparable perceived quality
- Not supported by most car stereos, game consoles, or older players
- Encoding is slower than lossy codecs
MP3.mp3
MP3 is a lossy audio format that shrinks files to a fraction of the original by permanently discarding data - the de facto standard for music files.
Pros
- Universal compatibility - plays on every OS, player, and car stereo
- Small file sizes at 128–320 kbps
- Supported by every device made in the last 30 years
Cons
- Lossy - quality is permanently reduced and cannot be recovered
- Audible artifacts at low bitrates (below about 128 kbps)
- Older and less efficient than AAC or Opus at the same file size
Which should you use?
FLAC: Choose FLAC when you want a permanent, lossless copy of your music or listen on equipment that decodes it.
MP3: Choose MP3 when file size and compatibility matter more than fidelity - streaming, car audio, older players.
Convert between FLAC and MP3
Free, runs in your browser - files are never uploaded.
Quick Answer
FLAC and MP3 are both audio formats with different trade-offs. FLAC keeps the recording exactly; MP3 is smaller and plays everywhere. Archive in FLAC, share in MP3. Choose FLAC when you want a permanent, lossless copy of your music or listen on equipment that decodes it. Choose MP3 when file size and compatibility matter more than fidelity - streaming, car audio, older players.
Key Facts
- FLAC: FLAC is a lossless audio format that compresses files to about 50–60% of their original size without dropping a single sample.
- MP3: MP3 is a lossy audio format that shrinks files to a fraction of the original by permanently discarding data - the de facto standard for music files.
- FLAC strengths: Lossless - decoding produces a bit-identical copy of the source; About 50–60% the size of an uncompressed WAV for the same audio; Widely supported by audiophile software and hardware players.
- MP3 strengths: Universal compatibility - plays on every OS, player, and car stereo; Small file sizes at 128–320 kbps; Supported by every device made in the last 30 years.
- FLAC trade-offs: 2–3× larger than MP3 or AAC at comparable perceived quality; Not supported by most car stereos, game consoles, or older players; Encoding is slower than lossy codecs.
- MP3 trade-offs: Lossy - quality is permanently reduced and cannot be recovered; Audible artifacts at low bitrates (below about 128 kbps); Older and less efficient than AAC or Opus at the same file size.
- Converting FLAC to MP3 is lossy (data is permanently discarded); converting MP3 to FLAC adds no new data - the detail MP3 already threw away cannot be recovered.
- FLAC keeps the recording exactly; MP3 is smaller and plays everywhere. Archive in FLAC, share in MP3.
Frequently Asked Questions
Which is better, FLAC or MP3?
FLAC keeps the recording exactly; MP3 is smaller and plays everywhere. Archive in FLAC, share in MP3. Choose FLAC when you want a permanent, lossless copy of your music or listen on equipment that decodes it. Choose MP3 when file size and compatibility matter more than fidelity - streaming, car audio, older players.
Is FLAC lossless or lossy?
FLAC is lossless, so no data is removed. MP3 is lossy, so some data is permanently removed to shrink the file.
Can I convert FLAC to MP3 without quality loss?
Converting FLAC to MP3 is lossy (data is permanently discarded); converting MP3 to FLAC adds no new data - the detail MP3 already threw away cannot be recovered. You can convert either direction with the free tools linked on this page.
What happens to my file when I convert FLAC to MP3?
Converting FLAC to MP3 is lossy (data is permanently discarded); converting MP3 to FLAC adds no new data - the detail MP3 already threw away cannot be recovered. Your original file is never modified - the converter downloads a new file.
Frequently Asked Questions
FLAC keeps the recording exactly; MP3 is smaller and plays everywhere. Archive in FLAC, share in MP3. Choose FLAC when you want a permanent, lossless copy of your music or listen on equipment that decodes it. Choose MP3 when file size and compatibility matter more than fidelity - streaming, car audio, older players.
FLAC is lossless, so no data is removed. MP3 is lossy, so some data is permanently removed to shrink the file.
Converting FLAC to MP3 is lossy (data is permanently discarded); converting MP3 to FLAC adds no new data - the detail MP3 already threw away cannot be recovered. You can convert either direction with the free tools linked on this page.
Converting FLAC to MP3 is lossy (data is permanently discarded); converting MP3 to FLAC adds no new data - the detail MP3 already threw away cannot be recovered. Your original file is never modified - the converter downloads a new file.