Convert M4A to WAV
Convert M4A to WAV on your device. Choose your file, convert, and check the result before sharing.
Drop the m4a file
Drag your M4A onto the page or click to browse. It is read locally, never sent anywhere.
Choose WAV
WAV output is 16-bit PCM, so there is no quality or bitrate menu. Click Convert to WAV to start.
Save the wav
The finished WAV downloads straight back to your device. Nothing touched a server on the way.
Why convert here, not there
No upload, ever
Server converters receive your m4a on their disk. This one reads it in your browser and nowhere else.
Local conversion
Choose your file, then click Convert to WAV. The browser may need to download the converter engine first; conversion time depends on your device and file.
No account, no daily cap
Convert every m4a you own, free. Nobody meters you, nobody asks for an account.
The two formats, briefly
| M4A | M4A is an audio container. This converter writes AAC audio inside M4A, not Apple Lossless. | |
|---|---|---|
| WAV | WAV is a container commonly used for PCM audio. This converter writes 16-bit PCM; the source sample rate and channels are not deliberately changed. | |
When you need this
- Decode M4A for an editor or workflow that asks for WAV PCM audio. This output is 16-bit, not an enhancement of the original recording, and can be much larger than compressed audio.
M4A vs WAV: what changes
| M4A | WAV | |
|---|---|---|
| Kind | Audio | Audio |
| Compression | AAC audio output here | 16-bit PCM output here |
| Typical size | Depends on the file and encoding settings. | Measure the exported file; it may be larger. |
| Opens on | Check the source in your app and browser. | Check the downloaded file in the receiving app. |
| Best for | Keep the original as your source. | WAV workflows, subject to the limits below. |
Keep the original. Compare the exported file before sharing or replacing it.
Tested on this tool
On 3 November 2026 we ran a synthetic test file through this converter: a 10-second, 44.1 kHz mono M4A (AAC) holding a 260 Hz tone, 102,237 bytes. The output was an 882,766-byte WAV - uncompressed 16-bit PCM at 44.1 kHz mono, 10.0 seconds - that decoded cleanly, with the 260 Hz tone still present when we measured it.
- The output was about 8.6 times larger than the source. That is expected: WAV stores raw samples, roughly 88,200 bytes per second at 44.1 kHz 16-bit mono, with no compression.
- Decoding AAC to PCM does not add quality back; it gives you an uncompressed copy of what the AAC held.
One synthetic tone is not every M4A. Real music and stereo or higher-sample-rate sources were not part of this test, and a phone browser can hit memory limits before a desktop does.
Good to know
- WAV output here is 16-bit PCM. There is no bitrate choice; converting a higher-bit-depth source can reduce precision.
- First use downloads the audio/video engine (about 30 MB). The input cap is 2 GB, but available browser memory can run out below that.