FLAC vs ALAC: Which Lossless Format Wins?
FLAC and ALAC are both lossless and sound identical — the only real difference is the ecosystem. FLAC is open and universal; ALAC is Apple-native. Here's which to pick.
Moving a library between them? FLAC → ALAC for Apple Music/iTunes, or ALAC → FLAC for everything else — free, lossless, no account.
Convert FLAC to ALAC →The Short Answer
FLAC and ALAC are both lossless and sound exactly the same — identical audio quality, near-identical file sizes. The only real difference is the ecosystem: FLAC is free, open, and supported almost everywhere; ALAC (Apple Lossless) is Apple's format, native to iTunes, Apple Music, and iOS. Choose ALAC if you live in Apple's world, FLAC for everything else (and for the widest compatibility).
Side by Side
| FLAC | ALAC | |
|---|---|---|
| Full name | Free Lossless Audio Codec | Apple Lossless Audio Codec |
| Quality | Lossless | Lossless — identical to FLAC |
| Do they sound different? | No | No |
| Size (3-min song) | ~20 MB | ~20 MB (often marginally larger) |
| Compression efficiency | Slightly better | Slightly less |
| Metadata & artwork | Full | Full |
| Native ecosystem | Everything except older Apple | Apple (iTunes, Apple Music, iOS) |
| Open / licensing | Free & open source | Apple's (open-sourced 2011) |
Quality: Truly Identical
Both are lossless, so a song stored as FLAC and the same song as ALAC contain the exact same audio — bit-for-bit after decoding. There is no audible or measurable quality difference. Anyone claiming one "sounds warmer" is mistaken; the samples are the same. Converting FLAC ↔ ALAC is quality-neutral (lossless to lossless), so you can move between them freely with zero loss.
File Size: Essentially a Tie
FLAC's compression is a touch more efficient than ALAC's, so FLAC files are often marginally smaller — but the gap is small (a few percent) and varies by track. For practical purposes, treat them as the same size.
The Real Deciding Factor: Your Ecosystem
- Apple user (iPhone, Mac, iTunes, Apple Music, AirPods)? → ALAC is native. It imports cleanly into the Music app, syncs to your devices, and plays without extra apps. (Modern Apple software can play FLAC too, but ALAC is the friction-free choice for a Music-app library.)
- Everything else (Android, Windows, foobar2000, VLC, most hi-fi streamers, Plex, car systems)? → FLAC is the universal standard with the broadest support.
- Want one format that works the widest? → FLAC — it's supported almost everywhere now, including current Apple apps.
Which Should You Choose?
- Building a library for Apple Music / iTunes? → ALAC.
- Building a platform-agnostic or non-Apple library? → FLAC.
- Archiving a master you'll re-use anywhere? → FLAC (most universal, open, slightly smaller).
- Switching platforms? → convert — it's lossless, so nothing is lost.
Converting Between Them (Lossless, No Quality Loss)
- FLAC → ALAC to bring a FLAC library into Apple Music/iTunes. FLAC to ALAC →
- ALAC → FLAC to use your Apple-ripped library everywhere else. ALAC to FLAC →
Because both are lossless, these conversions are perfectly reversible with zero quality change — you're just repackaging the same audio. Prefer an uncompressed format? See FLAC vs AIFF.
Frequently Asked Questions
Is ALAC better than FLAC?
No — they're identical in quality (both lossless). ALAC is better for Apple devices; FLAC is more universal and open. Neither sounds better than the other.
Do FLAC and ALAC sound different?
No. Both are lossless, so they contain the exact same audio. There's no audible or measurable difference.
Which is smaller, FLAC or ALAC?
FLAC is usually marginally smaller (slightly better compression), but the difference is small and track-dependent.
Can I convert FLAC to ALAC without losing quality?
Yes — both are lossless, so the conversion is perfectly reversible with no quality change.
Should I use FLAC or ALAC on Apple devices?
ALAC is native to Apple Music/iTunes and the smoothest option there, though modern Apple apps can also play FLAC.
Is ALAC lossless like FLAC?
Yes — ALAC (Apple Lossless) is fully lossless, just like FLAC.