18 Best AVI to MP3 Converters in 2026 (Free and Paid)

AVI to MP3 is the audio-extraction conversion for legacy video — old camcorder rips, downloaded files from the early 2000s, archived recordings on a NAS. AVI typically contains MP3 audio already (or sometimes raw PCM, AC3, or rarely AAC), so the extraction is usually a clean rip. If the audio inside is already MP3, you can copy it bit-for-bit out of the container without re-encoding. This guide compares 18 AVI to MP3 converters in 2026.

How to Convert is listed first because it is made by the same indie developer who writes this blog. AVI → MP3 has one trick worth knowing — when the audio is already MP3, no re-encode is needed.

Stream Copy When Possible

Check what audio codec your AVI contains:

ffprobe input.avi 2>&1 | grep Audio

If it says mp3, you can copy the audio stream out without re-encoding — lossless, instant:

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

If it says ac3 or pcm_s16le, you need to encode to MP3:

ffmpeg -i input.avi -vn -q:a 2 output.mp3

Quick Picks for AVI → MP3

• Best CLI: FFmpeg with -c:a copy when audio is already MP3.
• Best free GUI: fre:ac, Audacity, or VLC.
• Best for batch archive: FFmpeg in a script.
• One-shot: How to Convert.

One-shot: AVI to MP3 converter.

1. How to Convert

Drop AVIs in, pick MP3, hit convert. Detects when the audio is already MP3 and copies the stream losslessly.

Pricing

• One-time license; free trial.

2. FFmpeg

See the section above for stream-copy vs encode commands. Batch:

for f in *.avi; do ffmpeg -i "$f" -vn -q:a 2 "${f%.avi}.mp3"; done

Pricing

• Free, open source.

3. VLC

Media → Convert / Save → MP3. Quick one-off.

Pricing

• Free, open source.

4. Audacity

File → Open AVI (via FFmpeg helper), File → Export → MP3. Good for noise removal on old archive audio.

Pricing

• Free, open source.

5. fre:ac

Cross-platform batch converter.

Pricing

• Free, open source.

6. HandBrake

Video-focused but supports audio-only output. Useful for batch.

Pricing

• Free, open source.

7. Shutter Encoder

FFmpeg GUI with audio extraction.

Pricing

• Free.

8. XLD (Mac)

Mac batch converter.

Pricing

• Free.

9. Foobar2000 (Windows)

Windows audio tool with AVI audio extraction.

Pricing

• Free.

10. MediaHuman Audio Converter

Drag-and-drop batch tool.

Pricing

• Free.

11. Switch Audio Converter (NCH)

Lightweight commercial converter.

Pricing

• Free home; paid commercial.

12. Any Video Converter

Consumer tool with audio extraction.

Pricing

• Freemium.

13. Permute (Mac)

Mac-native converter.

Pricing

• One-time purchase.

14. CloudConvert

Web AVI → MP3.

Pricing

• Free tier; paid above.

15. Convertio

Web AVI → MP3.

Pricing

• Free with caps; paid above.

16. Online Audio Converter (123apps)

Browser-based.

Pricing

• Free with limits; paid above.

17. FreeConvert

Web converter.

Pricing

• Free with caps; paid above.

18. Zamzar

Long-running web converter.

Pricing

• Free with daily limits; paid above.

How to Choose

• Quick lossless when source is MP3: FFmpeg with -c:a copy.
• Quick re-encode when source is not MP3: FFmpeg with -q:a 2.
• Batch archive: FFmpeg in a script or fre:ac.
• Cleanup audio: Audacity.

Final Thoughts

AVI → MP3 is one of the cleanest conversions in this guide because the audio is often already MP3 — the conversion becomes a stream copy with no quality loss. FFmpeg handles this transparently. For batch archive work, scripting FFmpeg is the fastest and most flexible path; for one-off conversions or cleanup, Audacity adds value.