🎵MP4 to MP3
Extract audio from any video file. Free, private, no signup — files never leave your browser.
Your video’s audio, out in seconds.
FFmpeg runs inside your browser and pulls the soundtrack out of any video — high-quality MP3, no upload, no waiting room.
How to use MP4 to MP3
Pull the soundtrack out of any video. Drop an MP4, WebM or MOV file and get an MP3 back in seconds. Conversion happens locally with FFmpeg running in your browser — your video is never uploaded.
- 1Drop a video file (MP4, WebM, MOV).
- 2Click Convert to MP3 and wait for the conversion.
- 3Download the MP3 audio file.
Use cases
What mp4 to mp3 does
- ✓High-quality MP3 output straight from your video’s original audio track (M4A fallback if needed).
- ✓MP4, WebM and MOV inputs — output is a standard MP3 that plays everywhere.
- ✓Real FFmpeg under the hood, running locally via WebAssembly.
- ✓Engine downloads once (~30MB) and is cached — later conversions start immediately.
- ✓Private by construction: conversion never touches a server.
Specs
- Speed
- Seconds per video after first engine download
- Input
- MP4, WebM, MOV
- Output
- MP3 (high-quality VBR), M4A fallback
- Privacy
- Local FFmpeg, zero uploads
- Cost
- Free, unlimited, no signup
Frequently asked questions
Is my video uploaded to a server?
No. FFmpeg runs inside your browser via WebAssembly, so the whole conversion is local and private.
What quality is the MP3?
High quality VBR MP3, converted straight from your video’s original audio track.
Which video formats are supported?
MP4, WebM and MOV work. The audio is always saved as a standard MP3 that plays everywhere.
Why does the first conversion take longer?
The FFmpeg engine (~30MB) downloads once and is cached. Later conversions start right away.