Convert AIFF to ALAC — Free Online Converter

Both AIFF and ALAC are Apple formats that store audio at full quality, but they take fundamentally different approaches. AIFF stores raw uncompressed PCM — every sample is written directly, consuming about 10 MB per minute. ALAC (Apple Lossless Audio Codec) compresses the same data losslessly, achieving 50-60% size reduction while guaranteeing bit-for-bit perfect reproduction when decoded. Converting AIFF to ALAC halves your storage without sacrificing a single sample.

AIFF files are wastefully large for storage and library management. A 500-song AIFF library takes roughly 30 GB, while the same library in ALAC fits in about 15 GB with absolutely zero quality difference. ALAC plays natively on every Apple device — iPhone, iPad, Mac, HomePod, Apple TV, AirPods Max — and is the format Apple Music uses for lossless streaming. There is no reason to keep files as AIFF unless you need zero-decode-overhead for real-time DAW playback.