Convert AIFC to FLAC — Free Online Converter

AIFC (AIFF-C) is Apple's compressed audio interchange format from the late 1980s, supporting IMA ADPCM, MACE 3:1/6:1, G.711, and uncompressed PCM. FLAC (Free Lossless Audio Codec) is the open-source lossless compression standard developed by Josh Coalson, achieving 50-60% compression of PCM audio without any quality loss. FLAC is the most widely supported lossless format across all platforms.

Converting AIFC to FLAC moves legacy Apple audio into the modern open-source lossless ecosystem. For AIFC files with uncompressed PCM, this is a true lossless-to-lossless conversion with significant file size reduction. For compressed AIFC variants, it preserves the decompressed audio in the most universally supported lossless container available.

AIFC has near-zero support on modern systems. FLAC, by contrast, is supported by virtually every audio application, hardware player, streaming service, and operating system. VLC, foobar2000, Winamp, Audacity, Android, Linux, and most network audio players handle FLAC natively. Even Apple added FLAC support to iOS 11 and macOS High Sierra in 2017.

For AIFC files containing uncompressed PCM, converting to FLAC shrinks file size by 40-60% while maintaining bit-for-bit audio fidelity. This is a pure improvement — smaller files, identical audio, and vastly broader compatibility. FLAC's open-source, patent-free nature also makes it ideal for long-term archival, free from the licensing uncertainties that surround proprietary formats like AIFC's MACE codecs.