Convert AIFF to MP3 Online

AIFF (Audio Interchange File Format) is Apple's 1988 uncompressed PCM container — functionally the Mac equivalent of WAV, storing identical audio data with big-endian byte order and better native metadata support. Logic Pro, GarageBand, and classic Mac audio workflows produce AIFF, and like WAV it runs about 10 MB per minute of CD-quality stereo.

Since AIFF is lossless PCM, converting to MP3 gives you a single clean generation of lossy encoding — the best-case scenario for MP3 quality. A 320 kbps encode of an AIFF master is audibly transparent for nearly all listeners; 192 kbps remains a good space/quality balance for everyday listening.

The workflow mirrors WAV exactly: keep AIFF as your editing/archive format, and export MP3 for sharing, streaming upload, or devices. One AIFF advantage worth knowing: it supports embedded metadata and cover art more gracefully than plain WAV, and those tags are mapped into ID3 where possible during conversion.

Converting AIFF to MP3 is a common requirement wherever different players, apps, and devices need to exchange audio. Whether you are preparing tracks for a music player, a podcast host, a video project, or meeting an upload requirement, having the file in the right audio format is the starting point for every workflow.

AIFF files are tied to specific software, codecs, and hardware. When that audio needs to move into a context that requires MP3 - A different player, a DAW, a streaming platform, or a phone that only accepts certain formats - A fast, reliable converter removes the barrier without installing software or knowing anything about bitrates and codecs.

mp3.now processes your file securely in the cloud and returns a clean MP3 output at the bitrate and quality you choose. Files are processed privately and automatically deleted after 24 hours - Nothing is stored beyond what is needed to complete your conversion.