Audio Format Comparison

ALAC vs FLAC: Apple Lossless vs FLAC Audio Compared

ALAC and FLAC are both lossless audio codecs — they preserve every sample of the original recording. In a blind test, ALAC and FLAC from the same master source are literally identical; no human or instrument can distinguish them. The difference is ecosystem: ALAC lives in Apple's .m4a container and integrates seamlessly with iTunes, Music app, and Apple devices; FLAC is the open-source standard embraced by audiophile hardware, Android, Linux, and virtually every non-Apple audio tool.

ALACvsFLAC

Quick Verdict

Use ALAC when…

FLAC has broader software and hardware support and is the open-source community standard. ALAC is Apple's equivalent

Use FLAC when…

identical quality but better supported on iOS, macOS, and Apple Music. Both are bit-perfect lossless; the choice depends entirely on your ecosystem. Apple users: ALAC in iTunes/Music. Everyone else: FLAC.

ALAC vs FLAC: Feature Comparison

Feature	ALAC	FLAC
Full name	Apple Lossless Audio Codec	Free Lossless Audio Codec
Creator	Apple (2004)	Xiph.Org (2001)
Compression type	Lossless	Lossless
Audio quality	Bit-perfect	Bit-perfect
File size (4 min song)	~22–35 MB	~22–35 MB
Container	.m4a (MPEG-4)	.flac (native)
iTunes / Apple Music	Native, full metadata	iOS 11+, partial metadata
Android support	Third-party apps only	Most players natively
Hi-Fi DAC support	Good (improving)	Excellent (iFi, Chord, etc.)

When ALAC wins

✓Full name: Apple Lossless Audio Codec
✓Creator: Apple (2004)
✓Compression type: Lossless

When FLAC wins

✓Full name: Free Lossless Audio Codec
✓Creator: Xiph.Org (2001)
✓Compression type: Lossless

Frequently asked questions

Does FLAC sound better than ALAC?

No. Both are lossless — they decode to identical PCM audio. If you have the same recording encoded as FLAC and ALAC, they are mathematically identical when decoded. Any perceived difference is a placebo effect. Sound quality differences come from the recording, mastering, DAC, amplifier, and headphones — not the lossless codec.

Can I convert FLAC to ALAC without quality loss?

Yes — this is one of the very few audio conversions with zero quality loss. Since both are lossless, converting FLAC to ALAC (or vice versa) is a lossless transcode: the decoded PCM audio is re-encoded identically. Use dBpoweramp, XLD (Mac), or FFmpeg (`ffmpeg -i input.flac -c:a alac output.m4a`).

Which should I use for archiving music?

Either is equally good for archiving. FLAC is more universally accepted and is the preferred format for most ripping software (EAC, Whipper). If you're primarily an Apple ecosystem user and want seamless iTunes integration, ALAC is fine. Many audiophiles keep FLAC as master and convert to ALAC for Apple devices.

Does iPhone support FLAC?

Yes, since iOS 11. The Music app, Files app, and most third-party players can play FLAC on iPhone. However, Apple's ecosystem tools (iCloud Music Library, iTunes Match) don't sync FLAC — they convert it. For full Apple ecosystem integration, ALAC is still smoother.