MP4 to MP3 — Extract Audio From Video, No Upload
Drop an MP4, MOV or WebM you already have on your device and save its audio track as MP3, WAV, FLAC or OGG. The extraction runs in your browser — the video is never uploaded and never reaches a server.
Drop Your Video Here
MP4, MOV, WebM — audio files work too
Runs in the browser — once the page has loaded, it keeps working offline.
How it works
Load your video
Drag in an MP4, MOV or WebM, or pick one with the file button. The file stays on your device; nothing is uploaded anywhere.
Pick an audio format
MP3 at 192 kbps variable bitrate for something small and universal, WAV or FLAC to keep the track exactly as it was encoded in the video, OGG as a free alternative to MP3.
Export
One click and the audio track is a file. On a phone the system share sheet opens, so it can go straight into a message or another app.
Features
Your own files, not a link
This works on video already on your device — a recording, a screen capture, a download, a clip someone sent you. There is no URL box, and nothing is fetched from a streaming site.
No upload, no queue
The video is decoded where it already is, so nothing is transferred and there is nothing to wait for. What limits you is your device's memory rather than your connection: up to an hour of audio, the same as for an MP3.
Lossless out, if you want it
Exporting to WAV or FLAC adds no second generation of loss on top of whatever the video's audio was already encoded as.
MP4, MOV and WebM
The common containers from phones, screen recorders and cameras. The audio inside them is usually AAC, which the engine decodes directly.
Works on a phone
iOS Safari and Android Chrome behave the same as the desktop, and a video straight out of the camera roll opens directly.
What people use it for
Get the audio out of an interview you filmed
A camera or phone records video, but the deliverable is a podcast or a transcript. Pull the track out once and work with audio from there.
Save the sound from a screen recording
Screen captures carry the narration you actually wanted. Extract it and the file becomes a fraction of the size.
Take a lecture with you as audio
A recorded talk you already have becomes something you can listen to without the video draining the battery.
Lift a sample from your own footage
Export as WAV, drop it into your sampler, and keep the full quality the recording had.
Frequently asked questions
No, and that is on purpose. This tool works on a video file that is already on your device — nothing is downloaded from YouTube, TikTok or any other streaming site. If you are looking for that, this is not the right page.
Drop the MP4 in, pick MP3, and export. The audio inside an MP4 is almost always AAC, which the engine decodes directly, so the track comes out without a round trip through a server. MOV and WebM work the same way — the container differs, the audio inside does not.
No. The video is decoded in your browser and the audio is written there too. Nothing is sent to a server, which you can confirm yourself in the Network panel of your browser's developer tools.
MP4, MOV, WebM and MKV. Their audio is normally AAC or Opus, and the engine reads all four containers itself. AVI is not supported.
Exporting to WAV or FLAC does not — the track comes out as it was decoded, with nothing added on top. Exporting to MP3 or OGG re-encodes once; at 192 kbps variable bitrate that is very hard to hear, but WAV or FLAC is the safe choice if the audio is going into further editing.
Up to an hour, the same limit every tool here has — MP4, MOV, WebM and MKV are all read by the engine itself, so there is no separate, shorter ceiling for video any more. Past an hour the file is too big to hold in a browser tab; cut.audio Pro opens it whole in the Windows app.
Neither. Every feature is free, with no watermark, no ads and no email address to hand over.