Convert CAF to 3GP — Free Online Converter

CAF (Core Audio Format) is Apple's flexible audio container, introduced in macOS Tiger (10.4) as part of the Core Audio framework. CAF supports any audio codec (PCM, AAC, ALAC, IMA4, Opus, and more), has no file size limit (unlike WAV's 4 GB cap), and stores rich metadata including channel layouts, markers, and regions. CAF is the native format for Logic Pro recording sessions and macOS audio workflows.

Converting CAF to 3GP re-encodes the audio into a lightweight mobile container using AMR or low-bitrate AAC. This bridges professional macOS audio with legacy mobile infrastructure, enabling playback on older feature phones and compatibility with MMS gateways.

CAF files are a macOS-specific format with virtually no support outside Apple's ecosystem. Feature phones, MMS gateways, and telecom systems cannot process CAF. Converting to 3GP makes your macOS-recorded audio accessible to constrained mobile environments.

The conversion is particularly relevant for voice memos and field recordings captured on Mac hardware that need to be delivered through mobile channels with strict format and size requirements.