---
title: "MP4 to MP3 Converter — Extract Audio | Compress Pro"
description: "Extract the audio track from MP4 or MOV video and save it as MP3 — right in your browser. No upload, no sign-up, no length limits. Free and private."
canonical: https://compress-pro.com/mp4-to-mp3
---

# Convert MP4 to MP3.

> Pull audio out of any video — straight to MP3, locally.

Extract the audio track from any MP4 or MOV video and save it as an MP3 — the extraction and encoding run in your browser, so **nothing is uploaded and even hour-long recordings convert without limits**. Drop a video, pick a bitrate, download just the sound.

**No uploads · No ads · Free & open source.**

## How it works

1. Drop files anywhere on the page, click to browse, or paste with Ctrl/⌘ + V.
2. Pick a quality or preset — or set an exact target size and let the tool find it.
3. Compress, compare before/after, and download — individually or as a ZIP.

## What the MP3 can and cannot contain

Extraction re-encodes the sound that is already in the video — it cannot add fidelity that was never recorded. For talks and interviews filmed on a phone, 96–128 kbps captures everything there is; for concert or music footage, go 192 kbps or higher. To convert audio you already have as files, the [audio tool](https://compress-pro.com/compress-audio) handles MP3, M4A, WAV, FLAC, OGG and more directly.

## Typical uses

| Task | Setting |
| --- | --- |
| Lecture or podcast from a recording | 96–128 kbps |
| Song from a music video | 192–256 kbps |
| Voice notes for transcription | 96 kbps |
| Fit a size cap | Target size — type the cap |

## Frequently asked questions

### Does the video quality matter for the MP3?

No — the audio track is independent of the picture. A 4K and a 480p copy of the same video produce the identical MP3, because only the sound is re-encoded.

### What bitrate does the MP3 use?

Whatever you pick — 192 kbps by default, which sounds identical to the original for music. Switch to Target size mode to aim at a specific file size instead.

### Can I extract audio from many videos at once?

Yes — drop any number of MP4 or MOV files and each produces its own MP3, downloadable individually or as one ZIP. Long recordings work too; there is no length limit.

### Is it private?

Yes. The audio is decoded and re-encoded entirely in your browser — recordings never leave your device, and the server does nothing but deliver this page. Voice memos, interviews, demos: none of it is uploaded anywhere. Want proof? Run one file through, switch your connection off, and run another — it still works.

## Related tools

- [Compress & Convert audio](https://compress-pro.com/compress-audio)
- [Convert WAV to MP3](https://compress-pro.com/wav-to-mp3)
- [Convert M4A to MP3](https://compress-pro.com/m4a-to-mp3)
- [Compress videos](https://compress-pro.com/compress-video)

---

Part of [Compress Pro](https://compress-pro.com/) — every tool page has a markdown twin at `<page url>.md`. Full tool index: [llms.txt](https://compress-pro.com/llms.txt)