Convert Apple Lossless Audio Codec (.alac) to iPhone Audio (.iphone-audio) online for free. Fast, secure audio conversion with no watermarks or registration.
Upload your .m4a file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .m4a file when it's ready.
ALAC is Apple's lossless codec, natively decoded on every iPhone with hardware acceleration. iPhone Audio is a device preset producing AAC in M4A — the format Apple designed the iPhone around. Every iPhone includes a dedicated AAC hardware decoder in its audio subsystem, and AirPods maintain the AAC codec end-to-end over Bluetooth.
Converting ALAC to iPhone-optimized AAC creates compact music files from lossless sources. Since ALAC decodes to perfect PCM, the AAC encoder receives the best possible input — producing optimal quality at dramatically smaller file sizes.
iPhone storage is limited compared to home servers or desktops. ALAC occupies roughly 5-6 MB per minute; AAC at 256 kbps needs only 2 MB per minute. For iPhone users carrying large music libraries, AAC conversion triples available storage. Battery consumption is comparable since both codecs use hardware decoders.
AirPods use the AAC Bluetooth codec, meaning AAC files transmit to AirPods without transcoding. ALAC must be transcoded to SBC or AAC during Bluetooth transmission, potentially introducing latency or quality variation. Native AAC files provide the cleanest path from iPhone to AirPods.
FFmpeg decodes ALAC to perfect PCM and encodes using the AAC encoder at 256 kbps within M4A. Both source and target share the M4A container, so all metadata (album art, lyrics, gapless playback info, iTunes tags) transfers without modification. The AAC-LC profile at 44.1 kHz matches iPhone's native audio pipeline and AirPods' Bluetooth AAC codec.
256 kbps AAC from lossless ALAC is Apple's benchmark for transparent quality. Through AirPods (which use AAC Bluetooth), the chain is entirely AAC end-to-end — no transcoding artifacts. Through wired headphones or Lightning/USB-C DAC, the iPhone's audio subsystem decodes AAC with reference accuracy.
| Device | ALAC | iPhone Audio |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Native | Partial |
| iPhone/iPad | Native | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
ALAC to iPhone Audio maximizes iPhone music storage while maintaining transparent quality. The AAC-to-AirPods path is the cleanest audio chain in Apple's ecosystem.
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Ochrana soukromí
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Funguje všude
Jakýkoli prohlížeč, jakékoli zařízení
| No |
| Vlastnost | ALAC | iPhone Audio |
|---|---|---|
| Celý název | Apple Lossless Audio Codec | iPhone Compatible Audio |
| Přípona | .m4a | .m4a |
| Nejlepší pro | Lossless | iPhone optimized |