AVI to MP3 Converter
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Supports: AVI
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Need help?Convert AVI to MP3 Online
AVI is a Microsoft video container (RIFF-based, introduced in 1992) that interleaves a video stream with one or more audio tracks. This tool pulls the audio out and re-encodes it to MP3, then discards the video — so you get a small, universally playable audio file instead of a bulky movie. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours. No sign-up, no watermark.
How to Convert AVI to MP3
- Upload Your AVI File: Drag and drop your AVI onto the page or click "+ Add Files" to choose one or several at once.
- Set the MP3 Quality: Open Advanced Options. Leave Quality Preset on Very High for a balanced rip, or switch to Constant Bitrate / Variable Bitrate to lock an exact rate (128 kbps for podcasts and speech, 256–320 kbps for music).
- Trim or Adjust Audio (Optional): Use Trim to set a start point and duration if you only want a clip, and Audio Channel to force Mono or Stereo. Audio Sample Rate defaults to the source rate.
- Convert and Download: Click "Convert" and download your MP3. No sign-up, no watermark.
Choosing an MP3 Bitrate
MP3 (MPEG-1 Audio Layer III, standardized as ISO/IEC 11172-3) tops out at 320 kbps. Higher bitrates sound better but produce larger files; pick by how the audio will be used.
| Bitrate | Sounds like | Best for | ~Size per minute |
|---|---|---|---|
| 96 kbps | Acceptable, audible artifacts | Voice memos, audiobooks | ~0.7 MB |
| 128 kbps | Good, the classic MP3 default | Podcasts, lectures, speech | ~0.9 MB |
| 192 kbps | Very good, transparent for most | General music, mixed content | ~1.4 MB |
| 256 kbps | Near-CD, hard to fault | Music you'll keep | ~1.9 MB |
| 320 kbps | Maximum MP3 fidelity | Archiving, critical listening | ~2.4 MB |
If you need a perfect, lossless copy of the soundtrack instead of compressed MP3, use AVI to WAV — but expect files roughly 10x larger.
Frequently Asked Questions
Does converting AVI to MP3 lose quality?
The audio is re-encoded from whatever codec the AVI used (often MP3, AC3, or PCM) into MP3, which is lossy — so a small amount of fidelity is shed. Picking 256–320 kbps keeps the loss inaudible for almost everyone. The video stream itself is simply dropped, not "compressed," so discarding it costs you nothing on the audio side.
What bitrate should I use to keep the MP3 small enough to email?
Gmail caps attachments at 25 MB. At 128 kbps an MP3 runs roughly 1 MB per minute, so a 25 MB limit fits about 25 minutes; at 320 kbps that drops to around 10 minutes. For a long recording, drop to 96–128 kbps or use the Trim control to send only the part you need.
Will the whole audio track be extracted, or just part of it?
The entire audio stream is captured from start to finish by default. If your AVI carries more than one audio track (some do — AVI supports multiple streams), the primary track is used. Set a Trim start and duration only if you deliberately want a shorter clip.
Why is MP3 a better target than the original AVI for just listening?
A typical AVI bundles video that you don't need if you only want the sound, so it can be 10–50x larger than the audio alone. MP3 strips that away and plays natively on essentially every phone, car stereo, and music app, including iTunes, Windows Media Player, VLC, and local playback in Spotify.
How big will the MP3 be?
In our testing, a standard-definition AVI with a stereo soundtrack exported at 192 kbps produces a file of about 1.4 MB per minute of audio — so a 4-minute song lands near 5.8 MB, independent of how large the original video was. Lower the bitrate to shrink it further, or use the Audio Cutter afterward to keep just a section.