Pull the audio out of any MP4 video and save it as an MP3 — free, private, runs in your browser.
Extracting the audio track from an MP4 is one of the most common conversions on the web: people want the audio from a lecture, podcast interview, concert clip, or YouTube download they can listen to on a phone or car stereo without the video overhead. An MP3 is also dramatically smaller than the original MP4, making it easy to share over email or messaging.
Under the hood this is a real re-encode, not a remux — we read the AAC (or occasionally MP3) audio track inside the MP4 container, decode it to raw PCM, and re-encode it to MP3. There's a small quality cost from the second lossy pass, but at 192 kbps and above it's imperceptible in typical speech and music. Everything happens in your browser using WebCodecs — the MP4 file is never uploaded.
MP4 is the most widely supported video container, based on the ISO Base Media File Format. It can carry H.264, H.265 and AV1 video with AAC, MP3, or Opus audio.
MP3 is the most universally compatible lossy audio format — plays on every phone, car stereo, and audio player ever made.
Drag a MP4 onto the converter above, or click the box to pick one from your device.
We've preselected MP3 as the output format. Change it from the dropdown if you want a different target.
Click Convert and wait for the progress bar to finish. Download the MP3 when it's ready.
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