Video conversion
Convert WebM to AAC
Updated Jul 2026
WebM is a video format used mostly for web video, and AAC is a compressed audio format used by Apple devices, phones, and streaming services. Converting WebM to AAC pulls the audio track out of the video and saves it on its own. Doing this on your own computer means the original video never has to leave your machine.
- Extension
- .webm
- Type
- Video
- Typically
- Web video
- Compression
- Lossy
- Extension
- .aac
- Type
- Audio
- Typically
- Apple / streaming audio
- Compression
- Lossy
Convert WebM to AAC on your own computer. Nothing uploads.
How to convert WebM to AAC
- Open Morphjet and drag in the WebM file you want to pull audio from, or a whole folder of them.
- Choose AAC as the output format.
- Convert. Morphjet extracts the audio and writes the AAC file locally. The video itself is dropped, and nothing leaves your machine.
WebM vs AAC: what actually changes
| WebM | AAC | |
|---|---|---|
| Contains video | Yes, video and audio together | No, audio only |
| File size | Larger, because it holds the video | Much smaller, since only the audio remains |
| Quality | Lossy, tuned for web streaming | Lossy, with a small extra loss when the audio is re-encoded |
| Compatibility | Mainly web browsers and a handful of apps | Broad support on Apple devices, phones, and most media players |
| Typical use | Playing video on a website or in a browser | Music, podcasts, and audio libraries |
When to convert, and when not to
Convert WebM to AAC when you only need the sound from a video, like pulling out a lecture, a podcast episode, or a soundtrack, and you don't need to keep the picture.
Keep the original WebM if you still need the video, since converting to AAC throws away every frame of picture and there's no getting it back afterward.
Why not just use an online converter?
Video files often hold things you'd rather not hand over to a stranger's server, like a recorded call, a private talk, or footage from your own webcam. Many online audio extractors require you to upload the whole video just to pull out the sound. Converting on your own computer means the video and its audio stay on your machine the entire time.
Questions
Does converting WebM to AAC lose quality?
Yes, a little. The audio inside a WebM file is already compressed, and converting it to AAC re-encodes that audio, so a small amount of quality is lost in the process. For speech or casual listening it's rarely noticeable.
Will I still have the video after converting?
No. Converting to AAC keeps only the audio track. If you also want the video, keep the original WebM file alongside the new AAC file.
Is AAC widely supported?
Yes. AAC plays on iPhones, Android phones, and most media players and streaming apps, which is why it's a practical choice when you're moving audio out of a web-only format like WebM.
Does the AAC file keep any metadata from the WebM?
Not much. WebM doesn't usually carry track titles or artist tags the way a music file does, so there's little to carry over. You may want to add that information to the AAC file yourself afterward.
Can I convert WebM to AAC without uploading it anywhere?
Yes. A desktop app like Morphjet reads the WebM file and writes the AAC file directly on your computer, with no internet connection needed.
Morphjet converts WebM, AAC, and 1,800+ other formats, all on your machine. Launching this July.