Video To Audio
MP4 to MP3 Converter (Free & Online)
Extract audio from MP4, MKV, and MOV videos - right in your browser. No uploads, 100% private, fast conversions with WebAssembly.
- Convert MP4 to MP3 instantly (files never leave your device)
- Batch process multiple videos and download as ZIP
- Perfect for podcasts, lectures, voice notes, and music
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Convert Files in Your Browser
Drop files, pick the output format, and convert locally without uploads or signup.
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Batch ready
How to convert MP4 to MP3
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1
Add your MP4 files
Drop videos into the converter to extract the audio track.
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2
Choose MP3 output quality
Start with a preset or adjust bitrate for speech or music.
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3
Download audio only
The MP3 export is generated locally and ready right away.
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How to Convert MP4 to MP3
- Drag & drop your MP4, MKV, or MOV files into the box above.
- Set the output format to MP3 (it's preselected by default, but you can choose another).
- Choose bitrate and channels (see recommendations below), then click Convert Files.
Recommended MP3 Settings for Video Audio
- Speech (talks, lectures, interviews): 96 kbps, Mono, 44.1 kHz
- Mixed content (voice + background music): 128 kbps, Stereo, 44.1 kHz
- Music-focused tracks: 192 kbps or higher, Stereo, 44.1 kHz
Why Convert MP4 to MP3?
MP3 files are smaller and easier to share or edit. Extract just the audio from your video to create podcast episodes, study notes, or music-only tracks without re-uploading anything to a server.
Audio quality checklist before export
- Start from the highest quality source video: low-quality video audio cannot be restored later.
- Use mono for speech-only recordings: this reduces file size with minimal quality impact.
- Avoid very low bitrate for music: stay at 160-192 kbps if melody and ambience matter.
- Keep one original copy: export MP3 for distribution, but archive the source for future edits.
Common extraction issues and fixes
- Audio sounds too quiet: normalize in your editor after conversion if source levels are inconsistent.
- File size is larger than expected: reduce bitrate one step or switch from stereo to mono for voice.
- Speech lacks clarity: increase bitrate from 96 to 128 kbps and avoid multiple lossy conversions.
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Need the audio track without the video file?
Drop your MP4, MOV, or MKV file above and export a lighter MP3 copy for listening, notes, or publishing.