How to Convert MP4 to MP3 (Extract Audio from Any Video)

To extract audio from a video, upload your MP4 to MegaConvert.io and select MP3. The audio track downloads separately — the video is discarded, you keep only the sound. Takes seconds, no software needed.

Why This Is Useful

More people need this than you'd think:

• Music from videos — Rip audio from YouTube downloads, concert recordings, or music videos.
• Podcasts — Record a video interview, publish the audio-only version to your podcast feed.
• Lectures and talks — Extract audio from recorded classes to listen while commuting.
• Storage — An MP3 is 10–20x smaller than the MP4. If you only need the audio, why keep the video?
• Background listening — Play audio without a video player keeping your screen on.

How to Convert

1. Go to megaconvert.io/mp4-to-mp3.
2. Drag and drop your video file. Works with MP4, MOV, AVI, MKV, WebM — any video format.
3. The audio extraction starts automatically.
4. Download your .mp3 file.

The output quality matches the source. If your video has 192kbps audio, you get 192kbps MP3. No quality is added or lost.

MP3 vs WAV: Which Audio Format?

Need lossless quality for editing? Use MP4 to WAV instead.

Other Video Formats

Not every video is MP4:

• iPhone videos (MOV) — Convert MOV to MP4 first, or upload MOV directly.
• MKV files — Convert MKV to MP4.
• AVI files — Convert AVI to MP4.

Common Issues

"The audio sounds bad"

The extracted audio matches the source. If the video had low-quality audio (common in screen recordings or old clips), the MP3 will too. There's no way to improve audio quality through conversion.

"I only want a clip, not the whole file"

Currently, you'll get the full audio track. Trim the video first in any video editor, then convert to MP3.

For Developers

curl -X POST https://megaconvert.io/api/v1/convert/sync \
  -H "X-API-Key: YOUR_API_KEY" \
  -F "file=@lecture.mp4" \
  -F "output_format=mp3" \
  -o lecture.mp3

Process videos programmatically. API docs → | SDKs →