M4A to WAV Converter – Free Online

How to Convert M4A to WAV Online

Drop your M4A file

Drag and drop your .m4a file onto the box above, or click Choose Files. The request is already filled in: “Convert this to WAV”.

Say how, if you want

The AI assistant uses sensible defaults. To choose the sample rate yourself, say so in the request, for example “Convert this to WAV at 48 kHz”.

Save your WAV file

The assistant opens with your file and converts it on your own device; the file itself is never uploaded. When the WAV 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 M4A to WAV?

iPhone Voice Memos, GarageBand exports and Zoom recordings often arrive as M4A, but audio editors, transcription services and phone systems prefer WAV. Converting M4A to WAV gives you a plain PCM file that opens instantly in Audacity, Pro Tools, Logic and Descript.

The converter decodes AAC or ALAC in your browser with no upload, which is useful when the recording is a confidential interview or meeting, and lets you set the sample rate.

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

M4A vs WAV

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.

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.

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

M4A to WAV FAQ

Does M4A to WAV improve quality?

No. The WAV holds the M4A's audio as 16-bit PCM: AAC is decoded with no further loss, while 24-bit ALAC is reduced to 16-bit. It avoids further loss during editing but cannot add detail.

What sample rate should I use for transcription?

16 kHz is what most speech-recognition engines use internally and keeps the WAV small; use 44.1 or 48 kHz for music or broadcast.

Is this M4A to WAV converter free?

Yes. Converting M4A to WAV 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 M4A files uploaded to a server?

No. The conversion runs inside your browser using FFmpeg compiled to WebAssembly, so your .m4a 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 M4A to WAV?

There is no plan or account limit, but the converter loads the whole M4A 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 WAV settings myself?

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

Which browsers support the M4A to WAV 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.