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 AAC converter, without the upload.
Turn WMA audio files into AAC. 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 AAC
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.
AAC is already chosen
Press Convert. Open Options first if you want to change the defaults. The work happens in this tab.
Download
Save the AAC, or download everything as one ZIP if you converted several files.
Why ToAny
Private by construction
The WMA to AAC 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 AAC: what to expect
WMA does not play on Apple devices, most phones or in browsers. AAC is more efficient than MP3 at the same bitrate. WMA is at home in legacy Windows music libraries; AAC is the usual choice for efficient audio for streaming and video soundtracks. 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. AAC is written at 192 kbps unless you choose another bitrate.
WMA vs AAC
AAC
AAC audio
AAC was designed as the successor to MP3 and is the audio codec inside most MP4 videos and streaming services. A bare .aac file is the raw stream without a container, which some players handle poorly.
Opens in Most phones, browsers and media players
AAC converter| WMAWindows Media audio | AACAAC audio | |
|---|---|---|
| Stands for | Windows Media Audio | Advanced Audio Coding |
| Type | Audio | Audio |
| Compression | Lossy | Lossy |
| Introduced | 1999, by Microsoft | 1997, by the Moving Picture Experts Group |
| Opens in | Windows; needs extra software on Mac, iPhone and Android | Most phones, browsers and media players |
| Best for | Legacy Windows music libraries | Efficient audio for streaming and video soundtracks |
| File extension | .wma | .aac, .adts |
Questions
Are my audio files uploaded anywhere?
No. The WMA to AAC 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 AAC reduce quality?
AAC 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 AAC 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 AAC. There is nothing to install.
Is there a file size limit?
Yes. WMA to AAC 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.