How to convert Windows Media (WMV) to M4A (AAC/ALAC)
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Upload your file
Drag and drop a file or click to select one. Keep this page open while the file uploads and converts.
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Convert Windows Media (WMV) to M4A (AAC/ALAC)
NexMedia converts Windows Media (WMV) to M4A (AAC/ALAC) on its own servers. Processing time depends on the file size and how busy the queue is.
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Download the converted file
When the conversion finishes, the download appears on this page. Your converted file is kept for 2 hours, then deleted.
About Windows Media (WMV)
Windows Media Video (WMV) is Microsoft's family of video codecs, stored in the ASF container.
Older Windows software, Windows Movie Maker projects and video from the 2000s.
WMV files can carry DRM, and many devices outside Windows do not play WMV.
Convert WMV to M4A online free, no account required — M4A is an MPEG-4 audio file, usually holding AAC.
Change WMV to M4A without losing quality — convert WMV to M4A free in your browser.
Why does my WMV video refuse to play on my Mac or iPhone? Windows Media Video uses Microsoft codecs that Apple and Android devices don't include, so a conversion to MP4 is the quickest fix.
About M4A (AAC/ALAC)
M4A is an MPEG-4 audio file: the MP4 container holding only audio, usually AAC and sometimes Apple Lossless (ALAC).
Music bought on iTunes, iPhone voice memos and many podcast downloads.
Whether an M4A is lossy or lossless depends on the codec inside, which the file extension does not show.
Why convert audio to M4A? It wraps efficient AAC audio with chapter marks and cover art in one small file that Apple, Android and Windows all play.
What changes when you convert WMV to M4A
- The soundtrack of the WMV is re-encoded as M4A at the default settings, so it is close to the original but not bit-identical.
- Only the sound is kept: the M4A file contains the audio track of your WMV, and the picture is dropped.
- WMV files can carry DRM copy protection; protected files are detected and refused, because copy protection is never removed.
Settings you can change
Before you convert WMV to M4A, you can adjust: Audio codec, Rate control, Audio bitrate, Quality (VBR), Sample rate, Channels, Normalize loudness, Trim start, Trim duration, and Keep tags.
Limits
Each plan sets a maximum file size and a number of conversions per day, and video and audio files also have a maximum length. Guests can convert files up to 100 megabytes and 5 per day; a free account raises this to 500 megabytes and 25 per day; paid plans go up to 100 gigabytes.
Your converted M4A file is kept for 2 hours, then deleted.
WMV to M4A: questions and answers
Does converting WMV to M4A reduce quality?
The soundtrack of the WMV is re-encoded as M4A at the default settings, so it is close to the original but not bit-identical.
What is the difference between WMV and M4A?
WMV is Microsoft's Windows Media video format. M4A is an MPEG-4 audio file, usually holding AAC.
Can I change the settings when converting WMV to M4A?
Before you convert WMV to M4A, you can adjust: Audio codec, Rate control, Audio bitrate, Quality (VBR), Sample rate, Channels, Normalize loudness, Trim start, Trim duration, and Keep tags.
Do I need an account to convert WMV to M4A?
No. You can convert WMV to M4A without an account; signing in raises the file-size and daily limits.
How long is my converted M4A file kept?
The M4A file you convert from WMV is kept for 2 hours, then deleted automatically.
When I convert WMV to M4A, can I keep just the sound?
Only the sound is kept: the M4A file contains the audio track of your WMV, and the picture is dropped.
What happens if my WMV file is copy-protected?
WMV files can carry DRM copy protection; protected files are detected and refused, because copy protection is never removed.