WAV vs M4A
How do WAV and M4Acompare? Here's everything you need to know to choose the right format — and how to convert between them.
.wav
Full guide →Waveform Audio File Format
WAV is an uncompressed audio format that stores raw audio data at full quality. It's the standard format for professional audio editing, music production, and any application where quality is paramount.
.m4a
Full guide →MPEG-4 Audio
M4A is an audio-only MPEG-4 container, typically containing AAC or ALAC encoded audio. It's Apple's preferred format for music files in iTunes and Apple Music.
| Specification | WAV | M4A |
|---|---|---|
| Full name | Waveform Audio File Format | MPEG-4 Audio |
| Extension | .wav | .m4a |
| MIME type | audio/wav | audio/mp4 |
| Category | Audio | Audio |
| Developer | Microsoft / IBM | Apple / ISO |
| Year introduced | 1991 | 2001 |
| Compression | Lossless | Lossy |
WAV advantages
- Lossless — full audio quality preserved
- Industry standard for audio production
- Simple format — fast to process
- Universal support on all platforms
WAV limitations
- Very large file sizes
- No compression
- No metadata support in basic format
- Not practical for streaming or sharing
M4A advantages
- Better quality than MP3 at same size
- Native Apple ecosystem support
- Supports both lossy (AAC) and lossless (ALAC)
- Rich metadata and artwork
M4A limitations
- Less universal than MP3
- Confusing relationship with AAC
- Some older devices don't support it
- Apple-centric ecosystem
Which should you use?
WAV preserves full audio quality with no compression artifacts. M4A offers much smaller files at the cost of some quality. For casual listening, M4A is fine. For production or archival, use WAV.
Best uses for WAV
Best uses for M4A
Convert between WAV and M4A
Need to switch formats? Convert for free with SquishConvert.