M4A is a container for AAC — the successor to MP3 that is more efficient. At the same bitrate, AAC sounds slightly clearer than MP3 and is the standard for Apple Music, YouTube, and iPhone. However, M4A isn't always ideal — especially when you need WAV.
WAV brings the advantage: Raw lossless quality — studio standard. Best for editing and master archiving.
With FORMATTO, you can convert M4A to WAV in seconds. Everything runs 100% on your device — files are never uploaded to any server, so your privacy is guaranteed. Did you know? AAC at 128 kbps often sounds equivalent to MP3 at 192 kbps.
How to convert M4A to WAV
- 1Select or drag your M4A files to the box above (batch supported).
- 2Adjust quality and size as needed, then click "Convert to WAV".
- 3Download results one by one or together as a ZIP. Done — no signup, no upload.
Why your files are safe
100% on device
Files never leave your device.
No trace
Close the tab, data is gone.
Free
Unlimited, no watermark.
Frequently asked questions
How to convert M4A to WAV?
Just drag your M4A files to the converter box above, pick your settings, then click convert. The WAV result is ready to download — all processed on your device.
Is FORMATTO really free?
Yes, 100% free with unlimited conversions. Because everything runs in your browser, we have no per-conversion server cost — so it stays free forever.
Are my M4A files safe?
Very safe. Your files are processed directly on your device and never uploaded to a server. When the page is closed, no trace remains.
How many files can I convert at once?
You can process many files at once (batch). Download them individually or as a single ZIP.
What is the difference between M4A and AAC?
AAC is the codec, M4A is the file. Almost all M4A files contain AAC — our converter supports both.