Skip to content
ToolQivo

MP4 to MP3 Converter

Pull the audio out of a video as an MP3 — no upload, no watermark, no limit.

Converters Reviews Free · no sign-up

Drop an MP4 here, or click to choose one

Converted on your device — the video is never uploaded

Result

Quick Tool Overview

The MP4 to MP3 Converter extracts a video’s audio as an MP3 inside your browser — any size, any length, with bitrate, sample rate, channels, trimming and loudness levelling.

What it does
Extracts a video’s audio as MP3
You give it
An MP4, MOV, MKV or WebM
You get back
An MP3 at the bitrate you choose
Best for
Lectures, interviews and music from video
Converters Free, unlimited use No sign-up Runs in your browser

About the MP4 to MP3 Converter

Taking the sound out of a video is the most common media conversion there is — a lecture to listen to on the way home, the audio from an interview, a song from a performance you filmed. Every free site that does it wants the file uploaded first, puts a queue and a size cap in front of you, and keeps a copy on a server you cannot see.

The conversion runs in your browser through ffmpeg.wasm — the real ffmpeg, compiled to WebAssembly. Nothing is uploaded: a wedding video, a client recording or an unreleased track never leaves your machine. The engine is a one-off download of about 32 MB, after which your browser caches it and every later conversion starts immediately.

Choose the bitrate from 64 to 320 kb/s, resample, force mono to halve the size, trim to a section with a start time and a length, and even out the loudness to the EBU R128 broadcast standard. The page reads the video’s real audio details first, so it can tell you when you are asking for a higher bitrate than the source actually holds.

Key features of the MP4 to MP3 Converter

No size limit

No upload means no queue and no cap — only your device’s memory.

Bitrate from 64 to 320

Speech at 96, music at 320, everything else at 192.

Trim as you convert

Give a start time and a length to take just the part you need.

Loudness levelling

Optional EBU R128 normalisation for consistent volume.

Nothing is uploaded

ffmpeg runs inside the browser tab, so the file never leaves your computer.

How to use the MP4 to MP3 Converter

  1. 1

    Drop the video in

    MP4, MOV, MKV, WebM — anything with an audio track.

  2. 2

    Pick the bitrate

    192 kb/s is a good default; 320 for music, 96 for speech.

  3. 3

    Trim if you only want a section

    Give a start time and a length.

  4. 4

    Convert and download

    The first run downloads the engine once.

Frequently asked questions

No server limit, because there is no server. The practical ceiling is your device’s memory — a feature-length file works on a desktop, while a phone will struggle beyond a few hundred megabytes.

Reviews of the MP4 to MP3 Converter

What people who use the MP4 to MP3 Converter think of it. Reviews come from visitors and are posted as written.

No ratings yet

Yours would be the first.

  • 5 0 reviews rated 5 stars
  • 4 0 reviews rated 4 stars
  • 3 0 reviews rated 3 stars
  • 2 0 reviews rated 2 stars
  • 1 0 reviews rated 1 star

Write a review

Used this tool? Your rating helps the next person decide.

Your rating

Plain text only — links, email addresses and HTML are not accepted. Your name and review are shown publicly; nothing else is collected. See the privacy policy.

0 reviews

Newest first

No reviews yet

Be the first to rate the MP4 to MP3 Converter. It takes half a minute and no account.

Write the first review

More converters