WMA
Windows Media audio
WMA is Microsoft's answer to MP3 from 1999. Music ripped with Windows Media Player is often WMA, and little outside Windows plays it.
Opens in Windows; needs extra software on Mac, iPhone and Android
WMA converterWMA to M4A converter, without the upload.
Turn WMA audio files into M4A. It is converted in your browser, so the file never leaves your device.
Drop WMA files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Convert to
- On your device · nothing is uploaded
- No account, no email
- Batch and ZIP download
- Free
How to convert WMA to M4A
Add your WMA audio files
Drop WMA files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
M4A is already chosen
Press Convert. Open Options first if you want to change the defaults. The work happens in this tab.
Download
Save the M4A, or download everything as one ZIP if you converted several files.
Why ToAny
Private by construction
The WMA to M4A converter is part of this page and runs inside your browser. Your audio files are never sent to ToAny or to anyone else.
No upload, no queue
Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.
Free, without an account
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
WMA to M4A: what to expect
WMA does not play on Apple devices, most phones or in browsers. M4A sounds better than MP3 at the same file size and is native to Apple devices. WMA is at home in legacy Windows music libraries; M4A is the usual choice for music and voice memos on Apple devices. Both formats are lossy, so the content is compressed a second time; start from the best copy you have.
The defaults suit most files. Under Options you can choose the bitrate and trim the start and end.
This pair uses the compatibility engine, ffmpeg built for the browser, because WMA is not handled by the browser's built-in codecs. It is a one-off download of about 10 MB that the browser keeps, it is slower than the built-in codecs, and it takes files up to 1 GB. M4A is written at 192 kbps unless you choose another bitrate.
WMA vs M4A
M4A
M4A audio
M4A is an MP4 file that contains only audio, usually AAC. iPhone Voice Memos and the iTunes Store use it. It sounds better than MP3 at the same size but is not accepted everywhere MP3 is.
Opens in Apple devices, Android, current browsers; some car stereos and older players do not
M4A converter| WMAWindows Media audio | M4AM4A audio | |
|---|---|---|
| Stands for | Windows Media Audio | MPEG-4 Audio |
| Type | Audio | Audio |
| Compression | Lossy | Lossy (AAC); lossless when it holds ALAC |
| Introduced | 1999, by Microsoft | The early 2000s, by the Moving Picture Experts Group (popularised by Apple) |
| Opens in | Windows; needs extra software on Mac, iPhone and Android | Apple devices, Android, current browsers; some car stereos and older players do not |
| Best for | Legacy Windows music libraries | Music and voice memos on Apple devices |
| File extension | .wma | .m4a |
Questions
Are my audio files uploaded anywhere?
No. The WMA to M4A conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
Does converting WMA to M4A reduce quality?
M4A is a lossy format, so a small amount of detail is traded for a smaller file. At the default setting the difference is hard to notice. You can choose the bitrate under Options.
Can I convert several WMA files at once?
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
How do I convert WMA to M4A on Windows, Mac, iPhone or Android?
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the WMA file, press Convert and save the M4A. There is nothing to install.
Is there a file size limit?
Yes. WMA to M4A runs on the compatibility engine, which takes files up to 1 GB, and a long clip takes a while because it is slower than the browser's built-in codecs. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.