Quick Verdict
Use MP3 when…
Use MP3 for maximum device compatibility, sharing, and any workflow outside Apple's ecosystem — it plays on every device, car stereo, and audio tool on the planet.
Use ALAC when…
Use ALAC for archiving your music library in Apple's ecosystem, when you want a lossless master you can re-encode from, or for listening on Apple devices via Apple Music Lossless.
MP3 vs ALAC: Feature Comparison
| Feature | MP3 | ALAC |
|---|---|---|
| Compression | Lossy (MPEG Layer III) | Lossless (ALAC) |
| Audio quality | Excellent at 320 kbps | Bit-perfect |
| File size (4-min song) | ~7.5 MB at 320 kbps | ~22–35 MB |
| Device support | Universal — every device | Apple devices native; others via VLC/foobar |
| Car stereo USB | Works on virtually all | May not work on older stereos |
| Re-encoding quality | Further loss on re-encode | Re-encode to any format losslessly |
| Streaming service use | Many platforms | Apple Music Lossless only |
When MP3 wins
- ✓Compression: Lossy (MPEG Layer III)
- ✓Audio quality: Excellent at 320 kbps
- ✓File size (4-min song): ~7.5 MB at 320 kbps
When ALAC wins
- ✓Compression: Lossless (ALAC)
- ✓Audio quality: Bit-perfect
- ✓File size (4-min song): ~22–35 MB
Frequently asked questions
Can I convert MP3 to ALAC?
Technically yes, but the quality will still be limited by the original MP3. Converting lossy to lossless doesn't recover lost data — you get a large ALAC file with MP3 quality inside. Only encode to ALAC from a truly lossless source (WAV, FLAC, audio CD).
Is ALAC supported on Android?
Not natively by most Android devices. PowerAmp, VLC, and Neutron Music Player support ALAC on Android. For universal compatibility outside Apple devices, FLAC is the better lossless choice — it has broader native Android support.
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More comparisons
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