1. Is the M4A to WAV converter free?

Yes. It is free to use, with no sign-up and no watermark.

2. Are my files uploaded?

No. The M4A is decoded and converted inside your browser, so it never leaves your device.

3. Will the WAV sound better than the M4A?

No. M4A (AAC) is lossy, and converting to WAV can't restore detail that was removed. WAV simply stores the same audio uncompressed, which makes it easier to edit and more widely compatible.

4. Why is the WAV file so much bigger?

WAV stores uncompressed PCM. A 16-bit stereo WAV at 44.1 kHz uses about 10 MB per minute, while a typical AAC M4A uses 1–2 MB.

5. Does it support Apple Lossless (ALAC) M4A?

M4A files can contain AAC or ALAC audio. AAC works in all modern browsers; ALAC support depends on your browser, so if decoding fails, try Safari or another browser.

6. Can I convert purchased or protected songs?

Only DRM-free files can be converted. Protected tracks, such as older copy-protected iTunes purchases or streaming downloads, can't be decoded by the browser.

7. Is there a length limit?

Each file can be up to 8 minutes long and 200 MB. Longer recordings need more memory, so split them first.

8. Are tags and cover art kept?

No. The WAV contains the audio only; titles, artist names and artwork stored in the M4A are not copied.

MuseGen

Free Tools

M4A to WAV Converter

Convert M4A audio to uncompressed WAV right in your browser. No uploads — your files never leave your device.

Turn M4A into edit-ready WAV

M4A usually holds compressed AAC audio. Converting to WAV gives you uncompressed PCM that every DAW, sampler and video editor can import.

How to Convert M4A to WAV

Turn an M4A file into WAV in three quick steps.

Add your M4A file

Drag in an M4A file — for example an iPhone voice memo or a GarageBand export — or click to browse.

Convert to WAV

Click convert. Your browser decodes the AAC audio and writes a 16-bit PCM WAV file locally.

Preview & download

Listen to the result, then save the WAV file to your device.

Try it now

Why convert M4A to WAV with MuseGen?

Get a universally compatible WAV from M4A audio, without installing software.

Works in any editor

WAV opens in virtually every DAW, sampler and video editor, including tools that don't accept M4A.

Private by design

Conversion happens on your device, so voice memos and unreleased mixes never touch a server.

Original sample rate kept

The WAV keeps the sample rate of your M4A, so there is no extra resampling step.

No install, no sign-up

Open the page and convert. There is nothing to download or register.

Clean editing source

Uncompressed PCM avoids repeated AAC decoding while you cut, fade and mix.

Free to use

Convert as many M4A files as you need at no cost.

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M4A to WAV: AAC, Apple Lossless and What You Get After Converting

M4A is a file container from the MP4 family. Most M4A files hold AAC audio — the format used by iPhone voice memos, GarageBand exports and many downloads — while some hold Apple Lossless (ALAC). Converting M4A to WAV unpacks either one into plain PCM, the most widely supported audio format there is.

M4A to WAV converter with a voice memo converted to a 16-bit WAV file at 44,100 Hz — A voice memo converted from M4A to WAV, keeping its original sample rate.

AAC M4A vs Apple Lossless M4A

The .m4a extension doesn't tell you which codec is inside. AAC is lossy and small, roughly 1–2 MB per minute; ALAC is lossless and usually 4–6 MB per minute. Converting AAC M4A to WAV works in every modern browser. ALAC decoding depends on the browser — Safari supports it, while some other browsers don't — so if an ALAC file fails, open this M4A to WAV converter in Safari.

Why convert M4A to WAV

Many Windows apps, older DAWs, hardware samplers, broadcast systems and video editors handle WAV more reliably than M4A. Converting M4A to WAV is also a common first step before editing a voice memo or an interview: WAV opens instantly, scrubs smoothly and can be cut without any extra decoding.

Does converting change the sound?

No. The converter decodes the AAC or ALAC audio and writes the samples into a 16-bit PCM WAV at the original sample rate. Nothing is added or enhanced, and for AAC sources the WAV sounds identical to the M4A. Converting does drop metadata such as the title and artwork, which WAV files rarely use anyway.

Converting iPhone voice memos

Voice Memos on iPhone saves recordings as M4A. To convert one, tap the recording, choose Share and then Save to Files, or AirDrop it to a Mac. On a computer, open this page, drag the M4A file in and download the WAV. The recording keeps its original sample rate, so it lines up with other audio in your editing project.

What's inside an M4A file
Codec	Type	Typical size per minute	Browser support
AAC-LC	Lossy	1–2 MB	All modern browsers
HE-AAC	Lossy, low bitrate	0.3–0.5 MB	Most modern browsers
ALAC (Apple Lossless)	Lossless	4–6 MB	Safari; varies elsewhere