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ClipTools
AVIMP3

Convert AVI to MP3

This free AVI to MP3 converter pulls the audio track out of your Audio Video Interleave (.avi) video and saves it as an MP3, entirely in your browser. There is nothing to install, no account to create, and no watermark on the result.

100% private. Your file is processed locally in your browser with WebAssembly — it is never uploaded to a server, stored, or seen by anyone.

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The conversion runs on your own device using ffmpeg compiled to WebAssembly (ffmpeg.wasm), so your file is never uploaded to a server. MP3 is best for universal music and podcast playback, which is the usual reason to pull the audio out of AVI.

Why convert AVI to MP3?

  • MP3 plays on more devices and apps than AVI, so it is the safer choice for sharing.
  • The MP3 is far smaller than the original AVI video, because it keeps only the audio track.
  • Pick MP3 when you need a file made for universal music and podcast playback.

AVI vs MP3

PropertyAVIMP3
Full nameAudio Video InterleaveMPEG-1 Audio Layer III
ContainerAVIMP3
Typical codecMPEG-4 / MJPEGMP3
CompatibilityLimitedUniversal
Relative sizeLargestSmall
Best forOlder Windows software and archivesUniversal music and podcast playback

How to convert AVI to MP3

  1. Add your AVI file

    Drag and drop your .avi file onto the upload area, or click to browse and pick it from your device.

  2. Start the conversion

    Click "Convert to MP3". Everything runs locally with ffmpeg compiled to WebAssembly (ffmpeg.wasm) - your file stays on your device.

  3. Wait a few seconds

    A progress bar shows the conversion. The first run is slightly slower while the engine loads, then it is cached.

  4. Download your MP3 file

    When it finishes, download the .mp3 file straight to your device.

Frequently asked questions

Is this AVI to MP3 converter free?
Yes. It is completely free with no signup, no watermark, and no limit on how many files you convert. It is supported by ads, which keeps the conversion itself free.
Are my files uploaded to a server?
No. The conversion runs locally in your browser using ffmpeg compiled to WebAssembly (ffmpeg.wasm), so your file is processed in memory on your own device and is never uploaded, stored, or seen by anyone.
Will I lose quality converting AVI to MP3?
MP3 is a lossy audio format, so the extracted track is re-encoded. Choosing a higher quality keeps it close to the source; the tool cannot add quality the original audio did not have.
Will the file get smaller or larger?
Much smaller. An MP3 holds only the audio, so it is a small fraction of the original AVI video's size.
What is the difference between AVI and MP3?
AVI is Audio Video Interleave (an AVI container, typically MPEG-4 / MJPEG); MP3 is MPEG-1 Audio Layer III (an MP3 container, typically MP3). MP3 is best for universal music and podcast playback, while AVI is best for older Windows software and archives.
How long does the conversion take?
Most files finish in a few seconds to under a minute, depending on length and your device. The first conversion is a little slower while the engine downloads and caches, then later runs start instantly.

Related conversions

M4A → MP3WAV → MP3FLAC → MP3AAC → MP3OGG → MP3WMA → MP3

Need more formats or options? Use the full Video to MP3 Converter.