How to convert MP4 to MP3
Drop your MP4 files into the box above, or click Choose files. You can add several at once.
Pick a bitrate. 192 kbps sounds transparent to most listeners; 320 kbps is the maximum.
Click Convert to MP3. Files are processed on your device; a few minutes of media usually takes seconds.
Download the MP3 files one by one, or all at once as a ZIP.
Why convert MP4 to MP3?
Sometimes you only need the sound: a lecture to listen to on a walk, a podcast recorded as video, a song from a clip, or an interview to transcribe. An MP3 is a fraction of the video's size.
MP3 plays everywhere: phones, car stereos, smart speakers, older music players and every audio app.
Videos are big, and uploading them to an online converter takes time and hands your recording to a third party. Here the audio is extracted on your device, with no upload at all.
MP4 vs MP3
An MP4 is a container that holds video and audio tracks, usually H.264 video with AAC audio. An MP3 holds audio only, which makes it far smaller and simpler to play.
The audio track is decoded and re-encoded as MP3 at the bitrate you choose. The video track is discarded.
| Property | MP4 | MP3 |
|---|---|---|
| File size | Efficient | About 1 MB per minute at 128 kbps |
| Best for | Sharing and uploading video anywhere | Music and podcasts on any device |
| Support | Every phone, browser, TV and editing app | Every player, phone, car and browser |
Is it safe?
Yes. MP4 to MP3 runs entirely in your browser. Your files are read and converted by your own device using built-in browser technology, so they are never uploaded to a server and nobody else can see them.
You can check this yourself: open your browser's developer tools, switch to the Network tab and convert a file. No upload requests are made.
Audio is decoded and encoded by your browser, using its built-in media engine and a WebAssembly MP3 encoder. Recordings, voice memos and interviews never leave your device.
Files stay in this tab's memory only until you remove them or close the page.
Frequently Asked Questions
Which video formats can I convert to MP3?
MP4, MOV (including iPhone videos), WebM, MKV and M4A all work, as long as the file has an audio track your browser can decode.
Will the MP3 sound worse than the original?
Converting from one lossy format to another loses a little detail. At 192 kbps or higher, almost nobody can hear the difference. Use 320 kbps if you want the best possible copy.
Which bitrate should I choose?
192 kbps is the default and sounds transparent to most listeners. 128 kbps is fine for speech and podcasts and halves the size; 320 kbps is the maximum MP3 quality.
Are the title and artist kept?
Yes. Metadata tags such as title, artist and album are copied into the MP3 when the video has them.
Is there a file size limit?
Each file can be up to 500 MB. Files are read from disk in small pieces, so long recordings don't need to fit in memory.
How long does it take?
Usually a few seconds per minute of video, depending on your device. Nothing has to be uploaded or downloaded first, so the conversion starts immediately.