Convert MP4 to MP3
Sometimes you only need the audio from a video — a lecture, podcast, interview or song. Converting MP4 to MP3 extracts the soundtrack into a small audio-only file you can play on any device or music app, dropping the video entirely. The audio is pulled out in your browser with FFmpeg, so nothing is uploaded.
Drop your MP4 below and choose MP3 to extract just the audio.
Drop a video or audio file
or click to choose · MP4, MOV, WebM, MKV, AVI, MP3, WAV, M4A — converted in your browser
Why convert MP4 to MP3?
- Pull just the audio out of a video for podcasts, lectures or music.
- MP3 is tiny compared to the video and plays in every audio app and car stereo.
- Listen on the go without carrying the video file around.
- Extraction runs on your device — free, private, no watermark.
How to convert MP4 to MP3
- 1Drop your MP4 into the converter below (the first run downloads a ~30 MB engine, then caches it).
- 2Choose MP3 as the output format to keep only the audio track.
- 3Click convert; the tool strips the video and encodes the sound to MP3.
- 4Longer videos take a bit more time since it all runs locally.
- 5Download your MP3.
Frequently asked questions
Does this keep the video?+
No — converting to MP3 discards the picture entirely and keeps only the audio track, leaving you with a small sound-only file.
Will the audio sound worse than the original?+
MP3 is a lossy format, but at a normal bitrate the difference is hard to hear. You're extracting the existing soundtrack, not re-filming it.
Is my video uploaded to convert it?+
No. The audio is extracted in your browser with FFmpeg, so the video stays on your device the whole time.
Related conversions
Need more than MP4 → MP3?
The full Video & Audio Converter handles batches, resizing and more — all free and in your browser.