M4A to WMA Converter
Convert M4A to WMA free — no upload, no signup
To convert M4A to WMA, drop your M4A 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 M4A songs play in old 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 M4A to WMA
Add your M4A files
Drag and drop M4A 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 M4A to WMA?
Older Windows players and car stereos may not support M4A.
What happens when you convert M4A to WMA?
The AAC is re-encoded to WMA2 at 192 kbps.
How does Fylo convert M4A to WMA?
Fylo decodes the AAC (or ALAC) audio in the M4A 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 M4A you have. A 3-minute song is ≈ 3.6 MB at 160 kbps as M4A 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 M4A and WMA?
M4A is an MPEG-4 container that holds only audio — usually AAC, or Apple Lossless (ALAC). Apple popularised the extension with the iTunes Store in 2003; iPhone Voice Memos and many podcasts also use it. Audiobooks often use the related .m4b extension.
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: M4A format guide · WMA format guide
| Property | M4A | WMA |
|---|---|---|
| Compression | Lossy (AAC) or lossless (ALAC) | Lossy (also Pro/Lossless variants) |
| Typical bitrate | 128–256 kbps | 64–192 kbps |
| 3-minute song | ≈ 3.6 MB at 160 kbps | ≈ 3.6 MB at 160 kbps |
| Tags and cover art | Yes (full, with cover art) | Yes |
| Compatibility | Apple devices, Android, Windows 10+, browsers | Windows; poor on Mac, iPhone and browsers |
| Best for | iTunes/Apple Music libraries, voice memos, audiobooks | Old Windows Media Player libraries |
| Introduced | 2003 | 1999 |
Frequently asked questions
Is MP3 a better choice?
Usually yes — it plays everywhere, including Windows.
Will quality drop?
Slightly.
Is my M4A file uploaded to a server?
No. Fylo runs ffmpeg, the same engine used by professional video tools, compiled to WebAssembly inside your browser. Your M4A file is read directly from your device and never sent anywhere.
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