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AVI to MP3 Converter — Free, Online, No Upload

Rip the audio from old AVI video files — MP3 plays on every device ever made.

Free · no signup2 free files a day100% in-browser · no upload

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How to convert AVI to MP3 online

  1. 1

    Drop your AVI file

    Drag your Audio Video Interleave file onto the box above, or click it to pick a file.

  2. 2

    Wait a few seconds

    Conversion starts on its own and runs on your device, not on a server.

  3. 3

    Download your MP3

    Click Download to save the MPEG-1 Audio Layer III file.

AVI vs MP3: format overview

AVI

Audio Video Interleave

Microsoft · 1992

Compression
lossy
Transparency
No
  • ✓ Universal Windows compatibility
  • ✓ Simple container format — widely supported
  • ✗ Large file sizes (minimal compression)
MP3

MPEG-1 Audio Layer III

Fraunhofer Society · 1993

Compression
lossy
Transparency
No
  • ✓ Universal compatibility — plays everywhere
  • ✓ Good compression at 128–320 kbps

AVI magic bytes: 52 49 46 46 xx xx xx xx 41 56 49 20

MP3 magic bytes: 49 44 33 (ID3) / FF FB

Why convert AVI to MP3?

AVI is a container format from 1992, and while it is still recognized by nearly every video player ever made, it was never designed with audio extraction in mind. Old camcorder footage, DVD rips, and files from early digital cameras often arrive as AVI, and the audio inside — sometimes MP3, sometimes PCM, sometimes an older codec — is completely inaccessible to music players, podcast apps, or mobile devices.

MP3 remains the single most universally compatible audio format in existence. Every smartphone, car stereo, smart speaker, and audio platform on earth can play an MP3. It carries decades of backward compatibility that no other format can match. When you need the audio from an old AVI to be playable literally anywhere, MP3 is the answer.

This converter extracts the audio track from your AVI and encodes it as an MP3 file. AVI files can contain audio in various codecs — if the source is already MP3, the extraction is fast with no re-encoding. If it uses PCM or another codec, it will be encoded to MP3 at a quality suitable for music and voice. File sizes are small and the output works on every device without any additional software. Old footage audio becomes instantly portable.

Quality & file size: AVI to MP3

Typical sizes: AVI 200–600 MB (1 minute 1080p); MP3 3–5 MB (3-minute song).

MP3 output is encoded at 192 kbps.

Re-encoding one lossy format into another adds a second round of compression.

Frequently asked questions

What audio format is usually inside an AVI file?
Older AVI files typically contain MP3 or PCM (uncompressed) audio. Newer ones may contain AC3. Our converter re-encodes whatever's inside to a clean MP3 output.
Is it legal to extract audio from an AVI I downloaded?
This depends on your jurisdiction and the content's licensing. Extracting audio for personal use from content you own is generally permitted. Distributing extracted audio may infringe copyright — check the content's licence.

Your AVI file never leaves this tab — FormatDrop has no endpoint that receives file data. How it works