MP4 to MP3 Converter

Extract audio from MP4 video files and save as MP3. Processed entirely in your browser.

Your files never leave your device

Drag & drop your MP4 video here

or click to browse

Conversion Complete

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How to Convert MP4 to MP3

  1. Upload your MP4 video — Click the drop zone or drag & drop your video file.
  2. Click Extract Audio — FFmpeg WebAssembly extracts the audio track and encodes it as MP3.
  3. Download — Save your MP3 audio file at 192kbps quality.

This 2 That extracts audio from video files entirely in your browser using FFmpeg compiled to WebAssembly. Your files are never uploaded — 100% private. The first conversion loads the FFmpeg engine (~31MB), then subsequent conversions are instant.

Why Convert MP4 to MP3?

  • Extract music or audio from downloaded videos
  • Create audio-only versions of lectures and podcasts
  • Save storage space by removing the video track
  • Create ringtones or audio clips from video files
  • Listen to video content as audio on any music player

Frequently Asked

How long does conversion take?
The first conversion loads the FFmpeg engine (~31MB), which takes a few seconds. After that, a typical 5-minute video converts in under 10 seconds. Longer videos take proportionally longer.
What audio quality is the output?
Audio is encoded at 192kbps using the LAME MP3 encoder. This provides excellent quality suitable for music, speech, and podcasts.
Is there a file size limit?
Since processing happens in your browser, the limit depends on your device's memory. Most devices handle videos up to 500MB. For very large files, close other browser tabs to free memory.
Is my video kept private?
Yes, 100%. Your video never leaves your device. FFmpeg runs entirely in your browser via WebAssembly — no server processing.