Convert AVI to MP3
To convert AVI to MP3, drop the .avi file into the converter on this page and click the button; the audio is ripped out and downloaded as an MP3, and the video is discarded. ffmpeg does the extraction inside your browser, so decades-old footage never gets uploaded to anyone.
Runs in your browser. Your file never leaves your device.Drop your AVI hereChoose a AVI to convert
It becomes a MP3 right in your browser, up to 200 MB
Your file never leaves your device
Works in airplane mode. See the proof
Limits, published exactly
| Where it runs | In your browser. The file never leaves your device. |
|---|---|
| Free conversions | Unlimited. No account, no ads, no queue, no watermark. |
| Max file size, free | 200 MB |
Why convert AVI to MP3?
AVI is a relic of the Windows era, Microsoft's old Audio Video Interleave container, and it is exactly where a lot of personal history is stranded: camcorder tapes someone digitized in the 2000s, old screen recordings, downloads from a long time ago. Often the sound is the part worth saving, a relative's voice, music from a family event, narration over home footage, and you want it as audio you can actually play and share rather than a clunky video file half your devices no longer open. Ripping the track to MP3 frees that audio into a format every phone, player and editor still accepts, which is the whole point of pulling it out of an aging container.
What is AVI?
AVI (Audio Video Interleave) is Microsoft's 1992 video container, the format of camcorder archives, old screen recordings and a fair chunk of every family's digital history. The container predates modern streaming: no proper support for modern codecs' features, gigantic files, and shrinking support in current players and phones. Converting AVI to MP4 is the standard rescue for footage you want to keep watchable.
What is MP3?
MP3 is the audio format that ate the world in the late 1990s, and it remains the most universally supported way to store sound: lossy compression at roughly a tenth of CD size, playable on literally anything with a speaker. Newer codecs like AAC and Opus beat it on quality per kilobyte, but no format comes close to its compatibility across car stereos, ancient MP3 players, browsers, editing software and upload forms.
Quality and what to expect
AVI audio is frequently older MP3 or PCM, and it is re-encoded once to MP3 by LAME at a high variable bitrate (around 190kbps equivalent); the video is dropped rather than transcoded, so this is fast and produces audio only. If the original track was already a low-bitrate MP3, as a lot of vintage AVI files are, the conversion cannot improve it and re-encoding adds a small extra generation of loss, so the result will only ever sound as good as the source did. PCM or other uncompressed audio inside the AVI takes its one lossy step here. Channel count and length are preserved, and no metadata from the old file is carried across.
AVI to MP3 FAQ
My AVI is old and low quality. Will the MP3 sound better?
No. Re-encoding cannot add detail the original never had, and many vintage AVI files already hold low-bitrate audio. The MP3 will sound about like the source track, just in a format modern devices reliably play, with a small generation of loss from the re-encode.
Does my old footage get uploaded to convert it?
Never. The AVI is read into the ffmpeg WebAssembly engine running in your browser, and the audio is ripped on your own machine. Personal footage from years ago stays entirely on your device, with no server involved at any step.
Why only the audio and not the video?
This pair targets MP3, which is an audio-only format, so the video track is discarded and just the sound is encoded. Dropping the video is also why the conversion runs quickly even on a large, old AVI file.
Will a modern phone or app play the resulting MP3?
Yes. That is the reason to convert: while a .avi from the Windows days stumps many current players and phones, the MP3 it produces plays on essentially any device or app made this century.