About MP4 to MP3
A video file is usually two streams stacked together: pictures and sound. If you only want the sound, the video track is dead weight, and that is the case for lectures, interviews, concert recordings and any clip you want to listen to on a phone with the screen off. This tool pulls out the first audio track and turns it into a plain MP3 file.
The conversion happens on our server with FFmpeg. The MP4 is decoded, the audio is encoded with the LAME MP3 encoder at the bitrate you choose, and the video is discarded. The result keeps the length of the original soundtrack, gets a filename based on your video, and arrives as a normal download that any music player or podcast host accepts.
What this tool does
Bitrate choice that means something
128 kbps suits speech, 192 kbps is the default for general listening and 320 kbps keeps the most detail for music that will be edited or re-encoded later.
Accepts MP4 and M4V
Both the standard MP4 video container and the M4V variant used by Apple devices are supported, as long as the file contains an audio track.
Video track discarded
Only the audio stream is written to the output; no video data is kept in the MP3, so the file is a fraction of the original size.
Same length as the source
The MP3 matches the duration of the original soundtrack, with no trimming or gaps introduced by the conversion.
No account required
Open the page, upload, download. There is no registration wall, no watermark on the audio and no daily quota to work around.
Automatic deletion
The uploaded MP4 and the extracted MP3 live in a temporary folder on the server and are deleted automatically after your download.
How to use MP4 to MP3
- 01
Choose an MP4 video
Drop a .mp4 or .m4v file into the workspace or click to browse. Files up to 100 MB are accepted.
- 02
Pick an MP3 bitrate
Use 128 kbps for speech, 192 kbps for music and general use, or 320 kbps when you want the highest quality MP3 this tool can produce.
- 03
Extract the audio
Click Convert to MP3. The upload progress is shown, then the server extracts and encodes the soundtrack.
- 04
Preview and download
Listen to the result in the built-in audio player, then download the MP3. Press Start over to extract audio from another video.
Supported formats and limits
- Input
- MP4M4V
- Output
- MP3
- Processing
- Server-side FFmpeg job in a temporary directory, deleted after download.
- Maximum size
- Up to 100 MB
- Requirements
- Chrome, Edge, Firefox or Safari · Server-side FFmpeg conversion
Limitations worth knowing
- Accepts .mp4 and .m4v only, up to 100 MB, one file per job.
- The output is a lossy MP3; it is not a lossless copy of the original AAC audio.
- Only the first audio track is extracted; extra language or commentary tracks are ignored.
- Jobs stop after three minutes, so very long videos may not finish.
Privacy and file handling
Your MP4 is uploaded to a temporary working directory on our server, the audio is extracted with FFmpeg, and the MP3 is streamed back to your browser. Both files are deleted automatically when the download completes; nothing is stored permanently, analysed or shared, and no account is needed.
Read the full privacy policy