WAV is a raw uncompressed audio format (PCM). Quality is perfect and it's the recording studio standard, but files are large — 10x MP3 for the same duration. However, WAV isn't always ideal — especially when you need M4A.
M4A brings the advantage: AAC 30% more efficient than MP3 — clear sound at low bitrate, Apple/YouTube standard.
With FORMATTO, you can convert WAV to M4A in seconds. Everything runs 100% on your device — files are never uploaded to any server, so your privacy is guaranteed. Did you know? WAV stores every audio sample without compression, so 1 minute of stereo 44.1kHz is ~10 MB.
How to convert WAV to M4A
- 1Select or drag your WAV files to the box above (batch supported).
- 2Adjust quality and size as needed, then click "Convert to M4A".
- 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 WAV to M4A?
Just drag your WAV files to the converter box above, pick your settings, then click convert. The M4A 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 WAV 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.
Why is WAV so large?
Because it's uncompressed. Converting WAV to MP3/OGG usually shrinks 70-80% while still sounding great.