Converting M4A to WAV gives you a larger file with identical content. It runs in your browser: nothing is uploaded, there is no queue and no size limit.
What changes when you convert M4A to WAV
- WAV is lossless, but it cannot restore what M4A already threw away. The file will be larger, often much larger, with exactly the same picture in it.
When to convert, and when not to
Convert to WAV for recording and editing. Uncompressed PCM. Lossless, large, editable everywhere.
Keep M4A for Apple devices and streaming. AAC audio in an MP4 container. Apple's default; better than MP3 at the same bitrate.
Do not convert to WAV hoping to improve quality: the detail M4A discarded is gone. Convert only when a tool insists on WAV.
How to convert M4A to WAV
- Drop your M4A file on the converter above, or click to choose. Several at once is fine.
- Check the options if you need them: there are none for this pair, it just works.
- Click Convert, then Download. Nothing was sent anywhere, your browser did the work.
Questions
Is my M4A file uploaded?
No. The conversion runs in your browser with WebAssembly. There is no upload endpoint on this site. You can open your browser's Network tab, or go offline after the page loads, and it still works.
Is there a file size limit?
No fixed one. The limit is your device's memory: a large audio file on a phone is slower than on a laptop, but nothing is rejected for being big.
Is it free?
Yes, without an account, without a daily cap and without a watermark. Your device does the computing, so there is no server bill to pass on.
Will the quality drop?
No. WAV is lossless: the audio content is stored exactly.
Can I convert several files at once?
Yes. Drop them all; each is converted in turn and you can download them one by one or as a single ZIP.
Which engine does the conversion?
Media engine (FFmpeg, multithreaded WebAssembly), compiled to WebAssembly and running in your browser, on all your CPU cores when the browser allows it. First use downloads about 31 MB, cached afterwards.