AAC to WMA Converter
Convert AAC to WMA free — no upload, no signup
To convert AAC to WMA, drop your AAC audio files into the box below and click Convert. Fylo converts with ffmpeg running inside your browser, so nothing is uploaded and there's no signup or watermark. Make AAC audio play in older Windows software.
Drop audio files here
or tap to browse · paste with Ctrl+V · add many at once
Your files never leave your device
Advanced
How to convert AAC to WMA
Add your AAC files
Drag and drop AAC files into the box or tap to choose them. The converter engine (about 31 MB) downloads once, the first time you convert.
Pick a bitrate
192 kbps suits music and 128 kbps or less suits speech. Sample rate and mono/stereo are under Advanced.
Convert and download
Click Convert, then download each WMA file or all of them as one ZIP.
Why convert AAC to WMA?
Some legacy Windows players don't handle raw AAC.
What happens when you convert AAC to WMA?
The AAC is re-encoded to WMA2 at 192 kbps.
How does Fylo convert AAC to WMA?
Fylo decodes the AAC audio in the AAC with ffmpeg compiled to WebAssembly and encodes it with Windows Media Audio 2 (wmav2) at 192 kbps in an ASF container. Both formats are lossy, so each conversion discards a little detail — start from the highest-bitrate AAC you have. A 3-minute song is ≈ 3.6 MB at 160 kbps as AAC and ≈ 3.6 MB at 160 kbps as WMA. The original sample rate and channel layout are kept unless you change them under Advanced.
What's the difference between AAC and WMA?
AAC (Advanced Audio Coding) was standardised in 1997 as part of MPEG-2 and later MPEG-4, designed to replace MP3. It achieves better quality at the same bitrate, especially below 128 kbps. A .aac file is usually a raw ADTS stream; the same audio inside an MP4 container is called M4A.
WMA (Windows Media Audio) was released by Microsoft in 1999 to compete with MP3 and is stored in the ASF container. Windows Media Player ripped CDs to WMA by default for years, so many older music collections are WMA.
Learn more: AAC format guide · WMA format guide
| Property | AAC | WMA |
|---|---|---|
| Compression | Lossy | Lossy (also Pro/Lossless variants) |
| Typical bitrate | 96–256 kbps | 64–192 kbps |
| 3-minute song | ≈ 3.6 MB at 160 kbps | ≈ 3.6 MB at 160 kbps |
| Tags and cover art | Limited in raw .aac (full in M4A) | Yes |
| Compatibility | Very wide: Apple, Android, YouTube, browsers | Windows; poor on Mac, iPhone and browsers |
| Best for | Efficient music and video soundtracks | Old Windows Media Player libraries |
| Introduced | 1997 | 1999 |
Frequently asked questions
Is WMA a good long-term format?
No — MP3 or M4A are more future-proof.
Will it play in Windows Media Player?
Yes.
Is my AAC file uploaded to a server?
No. Fylo runs ffmpeg, the same engine used by professional video tools, compiled to WebAssembly inside your browser. Your AAC file is read directly from your device and never sent anywhere.
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