MP4 to MP3 Online is a free audio converter that runs entirely in your web browser. Drop in a video or audio file, pick a quality, and download your MP3 in seconds — no software to install and no account to create.
Private by design
Most online converters upload your files to a server. We do the opposite: conversion happens locally on your own device, inside your browser. Your files are never uploaded, stored, or shared with us or anyone else. Close the tab and nothing remains.
Free, with no strings attached
There are no accounts, no subscriptions, no watermarks, and no daily limits. Choose a quality from 128 to 320 kbps, convert, and keep your MP3. The converter works on phones, tablets, laptops, and desktops — anything with a modern browser.
What you can convert
MP4, M4A, WAV, WEBM, OGG, and MP3. If your browser can play the audio in a file, MP4 to MP3 Online can turn it into an MP3.