Rescroll

Convert MP4 to MP3, right in your browser.

Turn any MP4 video into an MP3 at up to 320 kbps. There's no upload and no size limit of ours, so even long videos convert in seconds. Free, with no sign-up.

  • 100% free
  • No watermark
  • No sign-up
  • Full quality
  • Files stay on your device

Loading the tool…

It runs in your browser. Nothing is uploaded.

How it works

How to extract audio from a video, free, in three steps.

  1. 1

    Drop in your video

    MP4, MOV, WebM or MKV, from a phone, a camera or a screen recorder, of any size. It opens in your browser; nothing is uploaded.

  2. 2

    Choose the format

    MP3 to play anywhere, WAV for editing, or M4A to keep the original sound exactly as it is, with no re-encoding when the video's sound is AAC.

  3. 3

    Download the audio

    Usually in a few seconds, even for long videos. No watermark, no account, no limit on how many.

Why this one

Free, with nothing held back, and nothing uploaded.

The original sound, untouched

Most phone and camera videos store their sound as AAC. Choose M4A and that sound is copied out bit for bit: no quality lost, done in a moment.

MP3 up to 320 kbps

MP3 at 128, 192, 256 or 320 kbps, encoded with the LAME encoder, for players, podcasts and anything that wants an MP3.

WAV for editing

Uncompressed 16-bit WAV at the video's own sample rate, ready for a DAW, a transcription service or a sound editor.

Big files welcome

The video is read from your disk as it's needed, so the sound of a multi-gigabyte camera file comes out as easily as a phone clip's.

Your file is opened and processed by your own browser. It is never sent to a server, so it stays private, and there’s no upload to wait for.

Converting MP4 to MP3

MP4 is a video file; MP3 is the audio format every player, car stereo and phone plays. Converting takes the sound out of the MP4 and encodes it as an MP3, so you can listen to a recorded talk, a lesson or your own song without the video.

Most MP4 to MP3 sites upload your video to their server first, which is slow for big files and means handing your video to a stranger. This converter runs in your browser: the MP4 is read on your device and the MP3 is made there too, with the LAME encoder at the bitrate you pick.

More from the audio extractor

Extract audio from video

Save any video's sound as MP3, WAV or M4A, the original copied untouched where possible.

MOV to MP3

Turn an iPhone or QuickTime MOV into an MP3, HEVC and HDR videos included.

Video to WAV

Save a video's sound as an uncompressed WAV for editing, mixing or transcription.

Rescroll

Got the audio. Now make the video.

Rescroll's AI video editor works from your recording too: it cuts the pauses and retakes, writes the captions from what you say and adds graphics, so a voice recording becomes a finished video.

  • Captions written from your audio
  • Pauses and retakes cut
  • Graphics timed to your words
Try RescrollSee the AI video editor

Questions

The audio extractor: your questions, answered.

What bitrate should I choose for MP3?

192 kbps is transparent for most listeners and keeps files small. Choose 320 kbps, MP3's highest, for music you care about, and 128 kbps for speech, where it's plenty.

Is it safe to convert MP4 to MP3 online?

With this converter your file never leaves your device: the conversion runs in your browser, so there's no upload, no copy kept on a server and no pop-up ads or downloads to install.

Which audio format should I choose?

M4A if you want the best quality and the video came from a phone or camera: its sound is copied out unchanged. MP3 if it has to play everywhere, at 192 kbps or more for music. WAV if you're going to edit it or send it for transcription.

Will the audio be the same length and in sync?

Yes. The whole soundtrack is taken out from start to end, so it's exactly as long as the video and lines up with it if you put it back in an editor.

Is this audio extractor really free?

Yes. There's no price, no trial, no account and no limit on how many files you do. The audio extractor runs on your own device, in your browser, so it costs us nothing to run and we don't charge for it.

Does it add a watermark?

No. The file you download has no watermark, no logo and no intro or outro added. It's your file, changed only in the way you asked.

Is my video uploaded anywhere?

No. The file is opened and processed by your browser, on your device, and never sent to a server: not to us, not to anyone. You can check: watch the Network tab of your browser's developer tools while it works, and you'll see the file is never sent anywhere.

How big a file can it handle?

There's no file size limit of ours. Files of several gigabytes work, because the file is read from your disk as it's needed rather than loaded all at once. What sets the pace is your device: a long 4K video takes longer on an older laptop than on a new one.

Which browsers does it work in?

Current versions of Chrome, Edge and Safari, and Firefox on a computer: any browser with the WebCodecs API for encoding video and sound. Some files, like iPhone HEVC video, need Chrome, Edge or Safari to decode. A computer is much faster than a phone for long videos.

More free tools for your videos

Silence remover

Cut the pauses and dead air out of any video or recording, automatically. Full quality, no watermark.

Video compressor

Shrink any video to a target size or quality as an MP4 that plays everywhere. No upload.

Video resizer

Change any video to 9:16, 1:1, 4:5 or 16:9 with a blurred fill or a crop. Full quality, no watermark.

Video trimmer

Cut the start and end off any video, frame-exact or lossless with no re-encoding.

Loudness normalizer

Bring any audio or video to −14, −16 or −23 LUFS, peaks held under −1 dBTP. Video untouched.

Keep reading

Where to go next.

AI video editor

The whole edit from a sentence: silences and bad takes cut, captions, color, zooms and graphics.

AI motion graphics

Counters, charts, app screens and maps designed from a description, on your own video.

All free tools

Video and audio tools, and 48 motion graphics generators. All free, all in your browser.