Video to MP3 Converter
Extract audio from video files online free — convert MP4 to MP3 or WAV in your browser. No sign-up needed — works entirely in your browser.
Pull the audio out of a video file
Video to MP3 keeps the sound and discards the picture. Drop in a lecture recording, an interview, a voice memo trapped in a video, or your own footage, choose a bitrate, and download a standard MP3. Optionally trim to one section first. Everything happens in your browser, so nothing is uploaded.
When audio-only is the right answer
A video file is a poor container for something you only intend to listen to. It is far larger than it needs to be, it will not queue in a music app or a podcast player, it cannot play with the screen off on some phones, and it cannot go in a playlist. Converting to MP3 fixes all of that. The common cases are arecorded lecture or seminar you want on a commute, an interview heading to a transcription service, a voice memo your phone saved as video, thesoundtrack of your own footage for reuse in an edit, and a webinar you would rather listen to than watch.
Choosing a bitrate
| Bitrate | Roughly per hour | Best for |
|---|---|---|
| 128 kbps | About 58 MB | Speech: lectures, interviews, podcasts, memos |
| 192 kbps | About 86 MB | Music and general use — the default |
| 320 kbps | About 144 MB | Maximum MP3 quality, archiving |
For anything that is mostly a human voice, 128 kbps is genuinely enough and halves the file against the default. Reach for 320 kbps only when the source is high quality music and you want the ceiling MP3 allows. One thing to be clear about: re-encoding cannot add back detail the video's own audio track never had, so choosing 320 kbps for a quiet phone recording produces a bigger file, not a better one.
Trimming while you extract
The optional start and end fields mean you rarely need a separate audio editor. Want one answer from a forty-minute interview, the chorus of a track you recorded, or minutes twelve to eighteen of a lecture? Enter the range and only that slice is exported. The fields accept plain seconds, m:ss, orh:mm:ss, so 150, 2:30, and 0:02:30 all mean two and a half minutes in. Leave both empty to convert the whole track.
Why this is quick when video tools are slow
Video compression has to decode and re-encode every frame, which is why it runs at roughly real time. Audio extraction throws the video stream away and re-encodes only the sound, a fraction of the data, so it usually finishes in seconds even on a long recording. The engine itself is around 31 MB of WebAssembly, downloaded once and then cached, after which the tool works with no connection at all.
Getting a cleaner recording out
- Match the bitrate to the source. A phone-recorded lecture gains nothing from 320 kbps.
- Trim first, not after. Setting the range here saves a second pass through an editor.
- Listen to the preview before downloading, particularly if you trimmed — it is the quickest way to catch a start time a few seconds off.
- Check the file has audio if the tool reports a problem; screen recordings made without a microphone genuinely contain no audio track.
- Keep the original video until you have confirmed the MP3, since re-extracting is free but recovering a deleted source is not.
Using this responsibly
Extracting audio is a neutral technical operation, but what you extract matters. Your own recordings, lectures you are permitted to keep, and royalty-free material are all fine. Taking the audio from copyrighted music or film you have no licence for is not, regardless of how easy the tool makes it. If you are recording other people, consent and local recording law apply before any of this becomes a question of file formats.
Related audio and video tools
To shrink the source video rather than strip its audio, use thevideo compressor. For a short looping visual clip instead of sound,video to GIF is the one you want. Once you have the MP3, theaudio trimmer cuts it further, theaudio converter changes format, and theloudness normaliser evens out a recording where the levels drift.
Frequently Asked Questions
How do I extract the audio from a video?
Drop the video above, choose an MP3 bitrate of 128, 192, or 320 kbps, optionally set start and end times to keep just one section, and press Extract. The audio is decoded and re-encoded on your device, and a preview player lets you listen before downloading.Is my video uploaded to a server?
No. Extraction runs on FFmpeg compiled to WebAssembly inside your browser, so the file is read from your disk into memory and never transmitted. Lecture recordings, interviews, voice memos, and personal footage all stay on your machine.Which bitrate should I choose?
192 kbps is the default and the sensible choice for music. Pick 320 kbps when quality matters more than size, since that is the maximum MP3 supports. Choose 128 kbps for speech — lectures, interviews, and podcasts sound clear at roughly half the file size.Can I extract just part of the audio?
Yes. Fill in the optional start and end fields to export a single slice, which saves loading the result into an audio editor afterwards. Times accept plain seconds, m:ss, or h:mm:ss, so 90, 1:30, and 0:01:30 all mean the same point.Which formats are supported and how large can the file be?
MP4, MOV, WebM, AVI, and MKV all work, up to 500 MB. If the video turns out to have no audio track at all, the tool says so rather than handing you a silent file that looks like a successful conversion.Why is extraction faster than video compression?
Because only the audio is re-encoded. The video stream is discarded rather than processed, and audio is a fraction of the data, so extraction usually finishes in seconds where compressing the same clip would take minutes.Why does the first extraction take longer?
The audio and video engine is around 31 MB of WebAssembly and downloads on first use, after which your browser caches it. Later extractions skip the download, and the tool then works even without a connection.Is it legal to convert a video to MP3?
For your own recordings, lectures you have permission to keep, voice memos, and royalty-free material, yes. Ripping copyrighted music you have no rights to breaches copyright and most platforms’ terms. Use it on content you own or are licensed to use.