Convert AIFC to AIFF — Free Online Converter

AIFC (AIFF-C) and AIFF are closely related Apple audio formats. AIFF stores strictly uncompressed PCM audio in big-endian byte order, while AIFC extends AIFF with a compression type field supporting IMA ADPCM, MACE 3:1/6:1, u-law, A-law, and uncompressed PCM (type 'NONE'). Both formats share the same IFF-derived container structure and were developed by Apple in the late 1980s.

Converting AIFC to AIFF decompresses any compressed audio in the AIFC container and stores the result as uncompressed PCM in a standard AIFF file. For AIFC files that already contain uncompressed PCM (compression type 'NONE'), the conversion is a lossless remux — the audio data is copied bit-for-bit into the AIFF container without any transcoding.

AIFF has broader software support than AIFC. Professional DAWs like Logic Pro, Pro Tools, and GarageBand handle AIFF reliably, but some choke on AIFC files — especially those containing MACE or IMA ADPCM compressed audio. Converting AIFC to AIFF ensures clean import into Apple's professional audio ecosystem.

Archival workflows often mandate uncompressed PCM in AIFF format. Broadcasting organizations, music libraries, and audio preservation projects typically reject compressed formats. Converting AIFC to AIFF satisfies these requirements while staying within Apple's native audio format family.