Convert any video file to M4A format online for free. Fast, secure, and easy-to-use video to M4A converter with no software installation required.
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Max file size: 50 MBMax duration: 30 min
Sign up for increased limitsA free account gets you up to 50 MB and 30 min.
Drag and drop your WMV file, or click to browse for it.
Choose M4A as the output and click Convert. The conversion runs on our servers, so your device does none of the work.
Download your converted file instantly. The download link expires in 1 hour for security.
Our powerful servers process your files quickly, delivering converted files in seconds.
Convert your files completely free with no hidden costs or subscription fees.
Your file is used only to make your conversion. It is never published or shared, and the download link expires after one hour.
Works directly in your web browser. No software download or installation required.
How the two formats differ on the things that change your result.
| Specification | WMV (source) | M4A (result) |
|---|---|---|
| Container | ASF | MPEG-4 Part 14 |
| Developed by | Microsoft | Apple / MPEG |
| Introduced | 1999 | 2003 |
| Audio codecs | WMA | AAC-LC, HE-AAC, ALAC |
| Compression | Lossy | Depends on codec |
| Typical bitrate | 128–384 kbps | 96–256 kbps |
| Approx. file size | 15–75 MB per minute | 0.72–1.92 MB per minute |
| Metadata / tags | — | MPEG-4 iTunes-style atoms |
| Licensing | Proprietary | Patent-licensed |
| Plays natively on | Native: Windows · Needs a player: macOS, iOS, Android | Native: Web browsers, Windows, macOS, iOS, Android, Smart TVs |
| Best for | Windows media libraries, legacy archives | the Apple ecosystem, music libraries, audiobooks |
Only the soundtrack survives: the video stream is dropped, and the WMA audio inside the WMV file is re-encoded as AAC-LC.
The size drop is dramatic because the video stream is where nearly all the data lives. A minute of WMV runs around 45 MB; the extracted M4A is roughly 1.3 MB per minute.
This tool takes the audio track from inside a WMV file, a ASF container from 1999, and saves it on its own as M4A. Everything visual is left behind.
WMV comes from Microsoft and dates to 1999. It usually holds WMV9 or VC-1 video with WMA sound, and those streams set the ceiling for anything converted out of it.
M4A comes from Apple / MPEG and dates to 2003. It carries audio in whichever codec it was encoded with (AAC-LC, HE-AAC, or ALAC), and without installing anything it plays on web browsers, Windows, macOS, iOS, Android, and smart TVs.
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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