Extract the audio track from MP4 to MP3 locally. The video never leaves your device.
Running locally on your device ...
Running locally on your device ...
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Your files never left your device
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No re-upload neededThese tools accept .MP3 - your file is handed over directly.
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
Often you only want a videos audio - a talk, an interview, or music as MP3 for your phone. This tool extracts the audio track from an MP4 and saves it as MP3. Bitrate and channels (mono/stereo) are freely selectable.
Conversion runs entirely locally in the browser with ffmpeg.wasm (self-hosted, no third-party CDN). Your video is not uploaded - the decisive difference for private recordings.
Honestly framed: a new audio track is created, not a magical gain in sound. If the source was already moderately compressed, a higher bitrate adds no extra detail, only a larger output. For spoken content such as a recorded lecture or a conversation, a low level in mono is usually entirely sufficient, whereas for music you would rather pick stereo and ample headroom.
| Input formats | MP4, M4V |
|---|---|
| Output format | MP3 |
| Batch processing | No |
| Processing | Locally in your browser (WebAssembly) |
| File upload | None |
Limitations: In-browser is slower than desktop software; very large/long videos can hit memory limits on mobile. Any existing text metadata (title, artist and so on) of the source file is carried into the MP3 by ffmpeg default behaviour; an embedded cover image is not, because it is technically an image stream and every image stream is dropped when the audio track is extracted. One file per run.
| Bitrate | Use |
|---|---|
| Low (128 kbps) | speech, podcast, small files |
| Medium (192 kbps) | good everyday default |
| High (256 kbps) | music with headroom |
| Maximum (320 kbps) | near-transparent for music |
No. The whole conversion happens locally in your browser.
ffmpeg runs as WebAssembly in the browser here; slower than native code, but without any upload.
Selectable 128/192/256/320 kbps, CBR or VBR. 320 is near-transparent for music.
Channels are selectable: keep the original, downmix to mono (smaller) or force stereo.
Yes, use the audio converter (MP3/WAV/M4A/FLAC/AAC/OGG).
Yes - the difference is structural: a classic online converter uploads your video to a foreign server that processes it there. Here the whole conversion runs in the browser on your own device; your video never leaves it.
Yes, in any current mobile browser (Chrome, Safari, Firefox) - no app install needed. With very large or long videos, though, a smartphone's limited memory can hit a wall sooner than a desktop PC's.
Yes, completely free - no account, no watermark, no cap on videos. Your device does the work itself, so no quota is needed.
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