Convert M4A to WAV
To convert M4A to WAV, add your .m4a file below and press the button: it's processed on your own device and you download the result, with nothing uploaded. It's free, needs no account, and works with files up to 500MB.
About converting M4A to WAV
M4A (.m4a) files can be converted to WAV entirely in your browser — no software to install, no file upload, and no account required. The conversion runs on a WebAssembly build of ffmpeg directly on your device.
Technical comparison
| M4A | WAV | |
|---|---|---|
| Category | audio | audio |
| Compression type | Lossy (AAC), or lossless via ALAC | Uncompressed (PCM) |
| Typical file size | Small — comparable to MP3 at a given bitrate | Large — roughly 10MB per minute at 16-bit/44.1kHz stereo |
| Transparency support | N/A (audio) | N/A (audio) |
How to convert M4A to WAV privately
Every step below runs on a WebAssembly build of ffmpeg inside this browser tab. Your .m4a file is never uploaded to a server — there's no network request carrying it anywhere.
Add your M4A file
Drag and drop, or click to select, a file (.m4a). It's read straight from disk into browser memory — no upload step exists.
Convert locally
FreePrivateConvert converts it to WAV using a WebAssembly build of ffmpeg, entirely within this browser tab.
Download the result
Save your converted .wav file. It only ever existed in this tab's memory — closing the tab without downloading discards it completely.
Convert M4A to WAV with ffmpeg (command line)
Prefer the terminal? This is the exact ffmpeg command this page runs for you:
ffmpeg -i input.m4a -c:a pcm_s16le output.wav- -i input.m4a
- Your M4A file.
- -c:a pcm_s16le
- Write uncompressed 16-bit PCM audio, the standard WAV format.
- output.wav
- The WAV file to create. ffmpeg picks the container from this extension.
Don't have ffmpeg installed? You don't need it: use the converter at the top of this page. It runs the same conversion on your own device, and your file is never uploaded.
FAQ
- Is my file uploaded anywhere?
- No. Your file is read and processed inside this browser tab and never leaves your device. You can confirm it in your browser's developer tools: the Network tab shows no upload.
- Does converting M4A to WAV reduce quality?
- WAV is uncompressed, so the conversion adds no loss, but it can't restore anything the M4A compression already removed. Expect a much larger file.
- Is there a file size limit?
- Yes: 500MB per file. There's no account and no limit on how many files you convert.
- What's the difference between M4A and WAV?
- M4A (MPEG-4 Audio) and WAV (Waveform Audio File Format) store data differently. M4A: lossy (AAC), or lossless via ALAC. WAV: uncompressed (PCM). WAV is an uncompressed PCM audio container — the format audio interfaces and DAWs record and edit in natively.
- Why convert M4A to WAV?
- Common uses for WAV: Multitrack recording and mixing in a DAW; Archival masters; Sound effect libraries. Zero compression means zero generation loss across repeated edit/re-save cycles, unlike lossy formats.
- What MIME type does a .wav file use?
- audio/wav, the standard type for Waveform Audio File Format.
- What is the ffmpeg command to convert M4A to WAV?
- Run: ffmpeg -i input.m4a -c:a pcm_s16le output.wav. This is the exact command FreePrivateConvert runs for this conversion, so you can use this page instead of installing ffmpeg: it runs the same conversion inside your browser.
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