WAV to M4A Converter – Free Online

How to Convert WAV to M4A Online

Drop your WAV file

Drag and drop your .wav file onto the box above, or click Choose Files. The request is already filled in: “Convert this to M4A”.

Say how, if you want

The AI assistant uses sensible defaults. To choose the bitrate, codec or sample rate yourself, say so in the request, for example “Convert this to M4A at 320 kbps”.

Save your M4A file

The assistant opens with your file and converts it on your own device; the file itself is never uploaded. When the M4A file is ready, click Save. Prefer to set everything by hand, or batch-convert several files into a ZIP? The classic converter is one click away on this page.

Why Convert WAV to M4A?

M4A with AAC is the format Apple devices and iTunes prefer, offering MP3-beating quality at around a tenth of a WAV's size. Converting WAV to M4A is ideal for voice memos, podcasts and music bounces headed for an iPhone or Apple Music library.

You can also choose ALAC inside M4A for a lossless file that stays around half the size of WAV. Either way, the conversion runs in your browser and keeps title, artist and album tags.

Private by design: your WAV file is converted on your own device and never uploaded.
M4A already asked for: the AI assistant's request says M4A, so one drop does it. Want a particular bitrate, codec or sample rate? Just say so.
Batch friendly: the classic converter on this page takes several WAV files in one go and downloads them as a ZIP.
Free, no watermark: no sign-up, and nothing stamped on the output.

WAV vs M4A

WAV (Waveform Audio File Format): WAV stores uncompressed PCM audio exactly as it was recorded. It is the standard for audio editing, mastering and archiving, at the cost of large files (about 10 MB per minute of CD-quality stereo). It is best for editing, mastering, DAWs and archiving.

M4A (MPEG-4 Audio): M4A is audio-only MP4, normally holding AAC (or lossless ALAC). It is the native format of iTunes, Apple Music and iPhone Voice Memos and sounds better than MP3 at the same bitrate. It is best for Apple devices, iTunes and voice memos.

In short: keep WAV when the priority is editing, mastering, DAWs and archiving, and switch to M4A when the file is headed for Apple devices, iTunes and voice memos. Need a different target? The full Audio Converter supports every format listed below.

WAV to M4A FAQ

Lossless or lossy M4A?

Choose the ALAC codec for a lossless file, or AAC at 256 kbps for a much smaller file that sounds transparent.

Will the M4A sync to my iPhone?

Yes. Both AAC and ALAC M4A files import into Apple Music/iTunes and sync to iPhone and iPad.

Is this WAV to M4A converter free?

Yes. Converting WAV to M4A on MediaConverter.io is free, with no watermark and no sign-up. The AI assistant runs on a free daily allowance of assistant credits; the classic converter on this page has no daily limit at all.

Are my WAV files uploaded to a server?

No. The conversion runs inside your browser using FFmpeg compiled to WebAssembly, so your .wav file is read and converted on your own device and never uploaded, which keeps private recordings private and means there is no waiting in an upload queue. The AI assistant only sees what you type and basic facts about the file: its name, format, duration and size.

Is there a file size limit for WAV to M4A?

There is no plan or account limit, but the converter loads the whole WAV file into your browser's memory, so about 2 GB per file is the practical ceiling; larger files may fail to open. Long or high-resolution files also take longer, especially on phones.

Can I choose the M4A settings myself?

Yes. Ask the AI assistant for a bitrate, codec or sample rate in your request. Audio track selection and every other setting are in the classic converter, one click away on this page.

Will converting WAV to M4A reduce quality?

M4A is a lossy format, so the WAV audio is decoded and re-encoded. Keep the bitrate at 100% (or pick 256 to 320 kbps) and the difference is inaudible for almost all listeners.

Which browsers support the WAV to M4A converter?

It is built and tested on current desktop Chrome and Edge. The conversion itself runs in WebAssembly, which every current desktop browser supports, so speed depends mostly on your computer's processor.