Convert M4A to WAV
Convert M4A recordings from Voice Memos or another Apple device to WAV for editing, noise cleanup or analysis. If the source is lossless ALAC, the result is bit-for-bit lossless too.
Free · no sign-up · your file is processed in your browser and never sent to a server
No file handy? Try it with a 20-second Turkish meeting recording.
How to use
- Choose your M4A fileDrop one or more M4A files. On this page the tool only accepts M4A; for other formats, use the audio converter.
- Pick the qualityWAV is written losslessly; turn on mono if you need a single channel.
- Convert and downloadFiles are processed one after another; each finished file comes with its own download link.
M4A and WAV at a glance
| M4A | WAV | |
|---|---|---|
| Codec | Usually AAC (sometimes lossless ALAC) | PCM (uncompressed) |
| Type | Lossy (lossless if ALAC) | Uncompressed |
| Approx. size | AAC 128 kbps: ~1 MB/min | 44.1 kHz / 16-bit stereo: ~10 MB/min |
| Typical source | iPhone Voice Memos, Apple devices, many Android recorder apps | Field recorders, exports from studio and editing software, music ripped from CDs |
Why convert?
- Importing into an editor or mixing desk
- Preparing for noise cleanup and audio enhancement
- Uploading to a platform that requires WAV
Common issues with M4A files
- AAC or ALAC? M4A with AAC is lossy; converting to WAV adds no loss but doesn't restore what's gone. With ALAC the result is lossless.
- Protected (M4P) files: Can't be opened in the browser.
- Size: WAV can be about 10 times larger than M4A.
Privacy: your file never leaves your device
Everything happens in your browser. Your file is not sent to Voiser's servers or stored anywhere, and it's cleared from memory when you close the tab. That's also why the tool stays fast on a slow connection.
Common questions
Why did the file get so big after converting to WAV?
WAV is uncompressed: one minute of 44.1 kHz stereo takes about 10 MB. For sharing, convert M4A to MP3 instead.
Can I use it directly on my iPhone?
Yes, it works in Safari. Save the recording to the Files app and choose it on this page.
Can I convert several files?
Yes, up to 10 files at a time.
Is my file uploaded to a server?
No. Your M4A file is converted in your browser; it isn't sent to Voiser or anywhere else, and it isn't stored.
Related tools
- Audio converterConvert files between MP3, WAV, M4A, OGG and FLAC.
- Extract audio from videoSave the audio track of your own videos as MP3, M4A or WAV.
- MP3 cutter and audio trimmerSelect any part of an audio file on the waveform and cut it out.
- Audio joinerMerge several audio files into one, in the order you choose.
Turn your converted recording into text.
Transcription turns speech into time-stamped text with separate speakers. Start with a free account.