Convert WAV to M4A
Runs in your browser. Your files never leave your device.
How we keep your files private
How to use Convert WAV to M4A
- Choose or drop your WAV file.
- Wait while your browser converts it to M4A (the first run downloads the converter once).
- Download the M4A file.
Common uses
- Playing audio in Apple apps.
- Making good-quality compact audio.
- Preparing podcast files.
About this tool
WAV is an uncompressed audio format with very large files and no quality loss. M4A is an audio container, usually AAC, used by Apple devices and iTunes.
Conversion runs on your device with FFmpeg compiled to WebAssembly, so your file is never uploaded. The first conversion downloads the engine (about 30 MB), which your browser then caches. Large files need a lot of memory, so use a desktop browser for videos over a few hundred megabytes.
Next steps
Frequently asked questions
Is my file uploaded?
No. The conversion runs in your browser with FFmpeg compiled to WebAssembly.
Why is the first conversion slow?
The converter engine (about 30 MB) downloads once and is cached. Conversions then run on your device, so large files take time.
Will converting WAV to M4A reduce quality?
Lossy formats lose a little quality each time they are re-encoded. Lossless targets such as WAV or FLAC keep what the source has.
What is the maximum file size?
There is no fixed limit, but browser memory is: files of a few hundred megabytes can work on a desktop, much less on phones.
Which codec is used?
The tool picks a widely supported codec for M4A.
Are my files uploaded to a server?
No. Everything runs inside your browser on your own device, so your files and text are never sent anywhere.
Is it really free?
Yes. There is no sign-up, no watermark and no limit on how often you use it.
Does it work on my phone?
Yes. It works in any modern browser on phones, tablets and computers. Very large files may be slow on older phones.