Convert WAV to M4A — Free Online Converter

WAV provides uncompressed PCM audio at roughly 10 MB per minute for CD-quality stereo, stored in Microsoft's RIFF container. M4A (MPEG-4 Audio) is Apple's audio-only container based on the ISO base media file format (MPEG-4 Part 14), typically containing AAC-encoded audio. M4A is the native format for iTunes Store purchases, Apple Music downloads, and iPhone Voice Memos.

Converting WAV to M4A compresses your raw audio using AAC encoding, achieving 10:1 compression ratios while maintaining excellent perceived quality. The M4A container provides rich metadata support including album art, lyrics, chapter markers, and full iTunes-compatible tagging.

M4A with AAC encoding delivers better audio quality than MP3 at the same bitrate, and the container is the native format for the entire Apple ecosystem. iTunes, Apple Music, iPhone, iPad, Apple Watch, HomePod, and AirPods all handle M4A with hardware-accelerated decoding for optimal battery life.

The M4A container also supports both lossy AAC and lossless ALAC within the same file format, making it versatile. Converting WAV to M4A/AAC is the standard workflow for anyone distributing audio through Apple platforms, while M4A/ALAC is preferred for lossless archiving within the Apple ecosystem.