Convert WAV to M4A
Turn a WAV into an M4A file that fits neatly into the Apple world: iTunes, Apple Music, and iPhone. It runs locally in your browser, so your file is never uploaded.
Why convert WAV to M4A?
M4A wraps AAC audio in an MP4 container, and it is the format Apple leans on across iTunes, Apple Music, and iPhone voice memos. If you are adding a track to your Apple Music library, syncing to an iPhone, or handing a file to someone who lives in the Apple ecosystem, M4A slots in cleanly without conversion prompts. It is more efficient than MP3 at the same bitrate, especially below 192 kbps, so you get good sound at a smaller size. Reach for it when the destination is Apple software or hardware rather than a random car stereo.
Quality and file size
M4A uses the AAC encoder to compress your WAV, which means it is lossy and discards some data to save space. The upside is that AAC tends to sound better than MP3 at matching bitrates, so 256 kbps AAC holds up well and the file stays compact. Compatibility is broad but a notch below MP3: some very old car units and non-Apple hardware may not play M4A natively. Keep your WAV as the master, since you cannot rebuild the discarded detail from the M4A later.
WAV to M4A: common questions
M4A or MP3, which should I choose?
Choose M4A if your file is headed for Apple Music, iTunes, or an iPhone, since AAC is more efficient at lower bitrates. Choose MP3 when you need the widest possible playback on old or unknown hardware.
Is the audio quality reduced?
Yes, M4A is lossy AAC, so some data is dropped to shrink the file. At 256 kbps most listeners will not hear the difference, and AAC generally sounds cleaner than MP3 at the same bitrate.
Does my WAV get uploaded to a server?
No. Everything runs in your browser with FFmpeg on WebAssembly, so the WAV stays on your device. We never receive it, store it, or use it to train anything.
Will M4A play everywhere?
It plays reliably on Apple devices, most modern phones, and current DAWs. Some older or non-Apple car stereos lack native M4A support, where MP3 is the safer pick.
Who makes this?
We're the small team behind Xport Studio, a private, fully offline app for AI vocals, stems, and mastering. These free tools are side experiments we wanted to share. No upsell, but if you're curious about the bigger thing, take a look.