Convert AIFC to M4A — Free Online Converter

AIFC (AIFF-C) is Apple's compressed audio interchange format from the classic Mac OS era, supporting IMA ADPCM, MACE 3:1/6:1, G.711, and uncompressed PCM. M4A (MPEG-4 Audio) is Apple's modern audio container, the successor format used across iTunes, Apple Music, iPhone, iPad, and the entire Apple ecosystem. M4A wraps either AAC lossy or ALAC lossless audio.

Converting AIFC to M4A is the natural upgrade path within Apple's own format lineage. It takes audio from Apple's oldest compressed container and places it in Apple's newest, ensuring native playback on every modern Apple device without any third-party software or codec installation.

AIFC was abandoned by Apple decades ago — no version of iOS, iPadOS, or modern macOS includes AIFC codec support for MACE or IMA ADPCM variants. M4A is Apple's current standard audio format with guaranteed long-term support across the entire ecosystem. Converting AIFC to M4A ensures your audio remains accessible on Apple hardware for the foreseeable future.

M4A also provides superior metadata support compared to AIFC. Album art, lyrics, chapter markers, and extensive tag fields are built into the MPEG-4 container. AIFC's metadata capabilities are limited to basic fields from the 1988 specification. M4A with AAC at 256 kbps is the standard for iTunes Store downloads and Apple Music offline caching.