An MP4 file contains both video and audio tracks. Converting to MP3 strips out the video and saves only the audio — useful for extracting music from recordings, saving podcasts or interviews, pulling audio from tutorials, or building playlists from video content.
Convert MP4 to MP3 Free (No Software Needed)
AllMediaTools MP4 to MP3 Converter converts video to audio entirely in your browser — no download, no signup for standard use.
- Open AllMediaTools MP4 to MP3 Converter.
- Click Upload Video and select your MP4 file.
- Choose output quality: 128 Kbps, 192 Kbps, or 320 Kbps.
- Click Convert and download the MP3.
Which Bitrate Should You Choose?
| Bitrate | File size per minute | Best for |
|---|---|---|
| 128 Kbps | ~1MB | Podcasts, voice recordings, general listening |
| 192 Kbps | ~1.4MB | Music, standard quality audio |
| 320 Kbps | ~2.4MB | Audiophile listening, archiving music |
Note: If your original video had audio at 128 Kbps, converting to 320 Kbps won’t improve quality — it just makes the file larger. You can only extract quality that already exists in the source.
Common Use Cases
YouTube audio for offline listening
Download the YouTube video using AllMediaTools, then convert to MP3 for a small, portable audio file.
Podcast from a recorded video interview
Convert the recording to MP3 and upload to your podcast host. The file is a fraction of the video’s size.
Meeting recordings for audio review
Screen recordings of meetings are often large MP4 files. Converting to MP3 makes them easy to review during commuting or exercise.
Converting on Desktop Without Online Tools
Mac (QuickTime)
Open the MP4 → File → Export As → Audio Only. Saves as M4A (AAC). Convert M4A → MP3 via iTunes/Music: right-click → Create MP3 Version.
Windows / Linux (FFmpeg, command line)
ffmpeg -i input.mp4 -q:a 0 -map a output.mp3Frequently Asked Questions
Will the audio quality be exactly the same as in the video?
Yes, if you choose a bitrate equal to or higher than the video’s original audio quality. The converter extracts the audio data without re-encoding unless you’re changing the bitrate.
Can I convert files larger than 1GB?
AllMediaTools handles files up to 10MB in the free tier. For larger files, use FFmpeg or VLC on desktop, which have no file size limits.
Can I convert MP4 to MP3 on iPhone?
Yes. The online converter works in Safari on iPhone. The converted file downloads to your Files app.