Video conversion
Convert AVI to MP3
Updated Jul 2026
AVI is an older Windows video format, and converting it to MP3 pulls out just the audio track and throws away the picture, giving you a small audio file that plays on any phone, speaker, or music app. To do this, open the AVI in a converter and export the audio as MP3. Doing it on your own computer means the video never has to leave your machine.
- Extension
- .avi
- Type
- Video
- Typically
- Legacy Windows video
- Extension
- .mp3
- Type
- Audio
- Typically
- The universal audio format
- Compression
- Lossy
Convert AVI to MP3 on your own computer. Nothing uploads.
How to convert AVI to MP3
- Open Morphjet and drag in the AVI file, or a whole folder of them, at once.
- Choose MP3 as the output, and pick a bitrate if you want a smaller file or better sound.
- Convert. Morphjet extracts the audio and writes an MP3 next to your original, and nothing leaves your machine.
AVI vs MP3: what actually changes
| AVI | MP3 | |
|---|---|---|
| Contains video | Yes, video and audio together | No, audio only |
| File size | Large, often gigabytes | Much smaller, usually a few megabytes per song or hour |
| Plays everywhere | No, needs Windows or a specific codec, often won't open on a phone or in a browser | Yes, universal support on every phone, speaker, and app |
| Audio quality | Depends on the codec used when the AVI was made | Good, with a small loss from re-compressing, less noticeable at higher bitrates |
| Song or track tags (artist, title) | No standard support | Yes, ID3 tags for artist, title, and album |
When to convert, and when not to
Convert AVI to MP3 when you only care about the sound, a lecture, interview, concert recording, or old home video, and want to listen on your phone or in a car without carrying the video around.
Keep the AVI if you still want the picture, because once you export the audio as MP3 the video is gone from that file for good.
Why not just use an online converter?
Old AVI files are often home videos or recordings people would rather not hand to a stranger's server just to pull out the audio. An online converter has to upload the whole video, sound and picture, before it can give you back an MP3. Converting on your own computer means the video stays on your machine the entire time, and only the small MP3 gets created.
Questions
Does converting AVI to MP3 lose quality?
A little. The audio gets re-compressed into MP3's lossy format, so there's some loss, though it's usually small at a decent bitrate. The bigger factor is the quality of the original audio track inside the AVI.
Will I still have the video after converting?
Not in the new file. Converting to MP3 keeps only the audio and discards the picture. Keep the original AVI if you might want the video later.
Why would I convert a video file to an audio-only format?
It's common for things like recorded lectures, interviews, or old home movies where the video isn't needed, just the sound. An MP3 is far smaller and plays on nearly anything.
Can I convert AVI to MP3 without uploading the file anywhere?
Yes. A desktop app like Morphjet extracts the audio locally, so the video never has to travel over the internet. It works with wifi off.
Does the MP3 keep any information from the AVI, like the title?
Not automatically. AVI doesn't carry music-style tags, so the resulting MP3 usually starts with blank artist and title fields unless you add them yourself afterward.
Morphjet converts AVI, MP3, and 1,800+ other formats, all on your machine. Launching this July.