AVI to MP3 converter

Pull the audio track out of older AVI recordings or DivX files.

Drop a AVI file hereThe converter loads in your browser.

What happens to your AVI

MP3 audio inside an AVI is copied straight out; PCM or other audio is encoded to MP3.

Tip: Many DivX AVIs already contain MP3 audio, so extraction takes only a second.

How to convert AVI to MP3

  1. Drop your AVI file on the box above, or tap it to pick one. The engine (about 31 MB) loads once per visit.
  2. The converter reads the file's streams and shows which codecs are inside.
  3. Pick a bitrate, or leave the default to keep the original audio when possible.
  4. Press the button, wait for the progress bar, then download your MP3.

Prefer the command line?

This is the FFmpeg command the converter runs for a typical AVI (mpeg4 + mp3). Paste it into a terminal with FFmpeg installed for batch jobs or files too big for a browser tab:

ffmpeg -y -i input.avi -vn -sn -c:a copy output.mp3

Streams are copied (-c copy), so this runs at disk speed. Your own file may contain different codecs; the converter above detects them and adapts. For other jobs, ask the FFmpeg command helper.

Questions

Why was it instant?

The AVI already held MP3 audio, so it was copied without re-encoding.

Is my AVI file uploaded?

No. The AVI is read from your device by FFmpeg running as WebAssembly in the page, and the MP3 is written back to your device. No server ever receives it.

Is there a size limit for AVI to MP3?

We set none. The practical limit is browser memory: roughly 2 GB of output on a computer, and much less on phones.