Convert any audio file to WMA format online for free. Fast, secure, and easy-to-use audio to WMA converter with no software installation required.
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Max file size: 50 MBMax duration: 30 min
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Drag and drop your AAC file, or click to browse for it.
Choose WMA as the output and click Convert. The conversion runs on our servers, so your device does none of the work.
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How the two formats differ on the things that change your result.
| Specification | AAC (source) | WMA (result) |
|---|---|---|
| Container | ADTS / raw AAC | ASF |
| Developed by | MPEG / Fraunhofer IIS | Microsoft |
| Introduced | 1997 | 1999 |
| Audio codecs | AAC-LC, HE-AAC | WMA, WMA Pro |
| Compression | Lossy | Lossy |
| Typical bitrate | 96–256 kbps | 64–192 kbps |
| Max sample rate | 96 kHz | 48 kHz |
| Max channels | 8 | 8 |
| Gapless playback | Partial | No |
| Metadata / tags | ID3v2 (limited in ADTS) | ASF / WM tags |
| Approx. file size | 0.72–1.92 MB per minute | 0.48–1.44 MB per minute |
| Licensing | Patent-licensed | Proprietary |
| Plays natively on | Native: Web browsers, Windows, macOS, iOS, Android, Smart TVs | Native: Windows · Needs a player: macOS, iOS, Android |
| Best for | streaming services, mobile playback, broadcast | Windows media libraries, legacy archives |
Both AAC and WMA are lossy, so this conversion decodes AAC-LC and re-encodes it as WMA. That second encode adds its own loss on top of the first. Choosing a higher bitrate, up to 192 kbps, keeps the damage small enough to be inaudible in most material.
Be aware that you are narrowing playback: AAC plays natively on web browsers, macOS, iOS, Android, and smart TVs, where WMA does not. Convert this way when you need the format specifically, not for portability.
If your source runs above 48 kHz, it will be resampled: WMA cannot store the 96 kHz that AAC allows.
The two formats are aimed at different jobs. AAC is typically used for streaming services, mobile playback, broadcast, while WMA is the usual pick for Windows media libraries, legacy archives. That difference in intent is what most of the specification gaps above come from.
Expect metadata to be rewritten rather than copied: ID3v2 (limited in ADTS) in the source becomes ASF / WM tags in the result. Standard fields map cleanly; niche custom tags often do not.
This page converts AAC files, stored in the ADTS / raw AAC container since 1997, into WMA, which uses ASF and dates from 1999. The differences between the two containers decide what changes in the result.
AAC comes from MPEG / Fraunhofer IIS and dates to 1997. It holds lossy-compressed audio (AAC-LC or HE-AAC), and that sets the ceiling for anything converted out of it.
WMA comes from Microsoft and dates to 1999. It carries lossy-compressed audio (WMA or WMA Pro), and without installing anything it plays on Windows.
After converting your file, you can use Scriptivox transcription services to convert your audio to text. Perfect for meetings, interviews, podcasts, and more.
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