MP4 to MP3 Converter
Extract MP3 audio from an MP4 video. Keep the full soundtrack or trim a section.
Source audio
100 MiB · 20 minSelect an MP4 file
MP4 and M4V videos
or drop it here · up to 100 MiB / 20 minOutput settings
How to convert MP4 to MP3
Save audio from a presentation, interview or personal video. Use “Trim audio” to keep only the section you need.
Working with a saved screen recording? Convert a screen recording to MP3.
Want a short clip for incoming calls? Make a ringtone from your video.
- 01
Choose an MP4 video from your device.
- 02
Choose an MP3 bitrate. Open “Trim audio” if you only need a section.
- 03
Select Convert to MP3 and download. Your original video stays unchanged.
Files stay on your device
Files are processed in your browser and are not uploaded to ToAudio.
Frequently asked questions
Up to 100 MiB and 20 minutes per file. Short recordings work best on phones.
Which bitrate should I choose?
192 kbps is a useful starting point. 128 kbps creates smaller files for speech; 320 kbps preserves more detail when the source has it. A higher bitrate cannot improve a low-quality recording.
Will every MP4 work?
MP4 is a container, not an audio codec. Common AAC audio is supported, but encrypted files or unusual codecs may not work. ToAudio checks the actual track before conversion.
Can I convert only part of my video?
Yes. Open “Trim audio” and set the section you need before selecting Convert to MP3.
Does MP4 to MP3 reduce quality?
Re-encoding to MP3 always involves lossy compression. Choose 192 kbps or 320 kbps to keep the output close to the source audio.
Does ToAudio upload my video?
No. The file is processed locally in your browser and is never uploaded to ToAudio servers.