Convert CAF to iPhone Audio — Free Online Converter

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.