Convert Core Audio Format (.caf) to iPhone Audio (.iphone-audio) online for free. Fast, secure audio conversion with no watermarks or registration.
Upload your .caf 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.
CAF (Core Audio Format) is Apple's professional audio container for macOS. iPhone Audio produces AAC in M4A optimized for iPhone's dedicated hardware AAC decoder. Every iPhone since the original 2007 model includes hardware AAC decoding, and modern A-series chips process AAC in their always-on audio subsystem with minimal battery drain.
Converting CAF to iPhone Audio creates files optimized for the iPhone audio pipeline — from hardware decode through the Lightning/USB-C DAC to AirPods' AAC Bluetooth codec.
iPhone cannot reliably play CAF files across all iOS applications. While the built-in audio framework has some CAF awareness, third-party apps, messaging apps, and web browsers cannot handle CAF. Converting to iPhone-optimized AAC ensures universal iOS compatibility.
AirPods use the AAC Bluetooth codec. Native AAC files stream to AirPods without transcoding, providing the cleanest audio chain. CAF files would require on-device transcoding before Bluetooth transmission.
FFmpeg reads the CAF container and encodes to AAC-LC at 256 kbps in M4A. If the CAF already contains AAC, stream copy transfers the audio without re-encoding. The AAC-LC profile at 44.1 kHz matches iPhone's native audio pipeline and AirPods' Bluetooth AAC codec.
From lossless CAF (PCM/ALAC), AAC at 256 kbps is transparent for most listeners. Stream copy from AAC-in-CAF preserves exact quality. Through AirPods, the AAC chain is end-to-end without transcoding artifacts.
| Device | CAF | iPhone Audio |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | 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
CAF to iPhone Audio delivers professional macOS recordings in iPhone's native format with hardware-accelerated decoding and clean AirPods streaming.
Biztonsagos atvitel
HTTPS titkositott feltoltes
Adatvedelmi prioritas
A fajlok feldolgozas utan automatikusan torlodnek
Regisztracio nem szukseges
Azonnal kezdhet konvertalni
Mindenhol mukodik
Barmely bongeszo, barmely eszkoz
| No |
| Jellemzo | CAF | iPhone Audio |
|---|---|---|
| Teljes nev | Core Audio Format | iPhone Compatible Audio |
| Kiterjesztes | .caf | .m4a |
| Leginkabb ajanlott | Apple native | iPhone optimized |