# Convert MP4 to MP3

> Save the audio track of a video as MP3. Works with MP4, MOV, WebM and MKV, without upload or extra software. Handy for talks, interviews and voice messages.

Recorded a talk on your phone and only need the audio? Drop the file here, MP3 is set. Since nothing is uploaded, even large videos are done fairly quickly.

- Open in browser: https://pockettoolbox.org/en/mp4-to-mp3
- Tool: [All-In-One File Converter](https://pockettoolbox.org/en/file-converter)
- Runs entirely in your browser; files and input are never uploaded.

## How it works

1. Drop a video (MP4, MOV, WebM or MKV) into the box.
2. MP3 is set. Pick WAV instead for lossless audio.
3. Convert and save the audio file.

## FAQ

### How large can the video be?

That depends on your device's memory, since everything happens in the browser. A normal laptop handles a few hundred megabytes without trouble.

### Can I trim the MP3 afterwards?

Yes, cut the start and end in the audio trimmer.

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PocketToolbox (https://pockettoolbox.org/en)