Video conversion
Convert WebM to M4A
Updated Jul 2026
WebM is a video format used for browser and screen recordings, and M4A is an audio-only format that iTunes, Apple Music, and Voice Memos expect. Converting WebM to M4A pulls out the audio track and discards the picture. Doing this on your own computer means the original recording never has to leave your machine.
- Extension
- .webm
- Type
- Video
- Typically
- Web video
- Compression
- Lossy
- Extension
- .m4a
- Type
- Audio
- Typically
- iTunes / voice memos
- Compression
- Lossy
Convert WebM to M4A on your own computer. Nothing uploads.
How to convert WebM to M4A
- Open Morphjet and drag in the WebM file, or a whole folder of them, that you want the audio from.
- Choose M4A as the output format.
- Convert. Morphjet pulls the audio track out and writes an M4A file next to the original, and nothing leaves your machine.
WebM vs M4A: what actually changes
| WebM | M4A | |
|---|---|---|
| Contains video | Yes | No, audio only |
| File size | Larger, holds video and audio together | Much smaller, audio only |
| Quality | Lossy video and audio | Lossy audio, no gain from converting |
| Opens in iTunes / Apple Music / Voice Memos | No | Yes, native support |
| Keeps track metadata (title, artist) | Rarely, video files seldom carry it | Yes, once you add it yourself |
| Typical use | Web video, screen recordings | iTunes library, podcasts, voice memos |
When to convert, and when not to
Convert WebM to M4A when you've recorded or downloaded something, like a lecture, meeting, interview, or voice memo, as a WebM video but only need the sound, for example to put it in iTunes, on an iPhone, or into a podcast library.
Keep the WebM if you still need the picture, since converting to M4A throws the video away for good.
Why not just use an online converter?
A WebM recording of a meeting, lecture, or voice memo can be a fairly personal file, and most online audio extractors ask you to upload the whole video just to hand back a smaller audio clip. Converting on your own computer skips that step, so the video, and the audio pulled from it, never leave your machine.
Questions
Does converting WebM to M4A lose quality?
The audio itself doesn't get better or worse just from changing containers, so you keep whatever quality was already in the WebM's sound track. There's no video quality to worry about, since the picture is dropped entirely.
Will I lose the video when I convert to M4A?
Yes, on purpose. M4A is an audio-only format, so the picture is discarded and only the sound track is kept. If you need the video too, hang on to the original WebM.
Why convert to M4A instead of just keeping the WebM's audio?
M4A is what iTunes, Apple Music, and Voice Memos expect, so it's the natural choice if you want the audio in your library or on an iPhone. Those apps don't recognize audio still sitting inside a WebM file.
Does the M4A keep any metadata, like a title?
Not automatically. WebM files usually don't carry track titles or artist tags, so the M4A comes out plain until you add that information yourself in a media player or tag editor.
Can I convert WebM to M4A without uploading it?
Yes. Morphjet runs the conversion on your own computer, so the video never has to travel over the internet, even with your wifi off.
Morphjet converts WebM, M4A, and 1,800+ other formats, all on your machine. Launching this July.