Convert MP4 to MP3
Upload an MP4 video and get its soundtrack back as a 192 kbps MP3. The video is removed, the audio is kept, and there is nothing to set up.
Upload an MP4 video and get its soundtrack back as a 192 kbps MP3. The video is removed, the audio is kept, and there is nothing to set up.
MP4 is the video format you run into most: Android phones, most cameras, video editors, Zoom and screen recorders all save it. When all you actually need is the sound, such as a talk, an interview or a song you recorded yourself, turning the MP4 into an MP3 gives you a small file that any music app, car stereo or podcast editor can open.
Here is exactly what our converter produces. The picture is thrown away and only the audio is written, encoded with the LAME MP3 encoder at a constant 192 kbps. The original sample rate is kept (anything above 48 kHz is brought down to 48 kHz), mono stays mono, and stereo stays stereo. You don't have to pick any settings, because there aren't any to pick.
Nearly every MP4 stores its sound as AAC, which is already a compressed, lossy format. Producing an MP3 means decoding that AAC and encoding it again, so a small generation loss is unavoidable. At 192 kbps it is rarely noticeable on speech or casual music listening, but keep in mind that no conversion can add back detail the AAC track never had. A phone clip recorded with a tinny built-in mic will sound just as tinny afterward.
| What's inside the MP4 | What happens | MP3 result |
|---|---|---|
| AAC stereo (most common) | Decoded and re-encoded | 192 kbps stereo |
| AAC mono (some voice or screen recorders) | Decoded and re-encoded | 192 kbps mono |
| 5.1 surround audio | Downmixed | 192 kbps stereo |
Size is easy to predict because the bitrate is fixed: each minute of MP3 takes about 1.44 MB. A 10-minute MP4 therefore yields roughly a 14.4 MB MP3 no matter how sharp or large the video was.
If the audio is headed for further editing and you would rather avoid a second lossy step, MP4 to WAV gives you an uncompressed copy instead.
Trim the part you need in your phone's gallery or a desktop editor, or export the video at a lower resolution. Resolution changes don't affect the audio track, so a 480p export keeps the same sound in a much smaller file. Long recordings can also be split into several shorter clips and converted one at a time.
Zoom's local recordings usually include an audio-only M4A next to the MP4. That file is far smaller, so converting it with M4A to MP3 avoids the size limit entirely.
Some MP4s have no audio track at all, which happens with muted screen captures and certain animations. There is nothing to extract from those. Purchased or rented films protected by DRM can't be converted either.
The converter works on files saved to your device; it does not fetch videos from web links. Convert only material you made or have permission to use.
| Full name | MPEG-1/2 Audio Layer III |
|---|---|
| Compression | Lossy |
| Developed by | Fraunhofer IIS / MPEG |
| Introduced | 1993 |
| File extension | .mp3 |
| Typically used for | Music libraries, podcasts, everyday listening |
| Plays on | Virtually every phone, computer, browser, car stereo and media player |
| Our output | LAME MP3, 192 kbps CBR, stereo |
Slightly, in theory. MP4 files almost always store audio as AAC, which is already compressed, so making an MP3 means encoding it a second time. At 192 kbps that extra loss is usually inaudible for speech and everyday music listening. The conversion can't make the sound better than the original AAC track, though.
The converter doesn't accept links or download anything from websites. It only works with files already saved on your phone or computer. If you have an MP4 that you recorded yourself or have the right to use, you can upload it and convert it to MP3.
Uploads are limited to 50 MB per file. Trim the video to the part you need, export it at a lower resolution (which leaves the audio untouched but shrinks the file a lot), or split a long recording into shorter clips and convert each one separately.
The MP3 is always encoded at 192 kbps, which works out to about 1.44 MB per minute of audio. A 5-minute video gives you an MP3 of roughly 7 MB, and a 20-minute one about 29 MB, regardless of the video's resolution.
No. There are no settings on the converter: every MP3 is written at 192 kbps constant bitrate with the original sample rate kept up to 48 kHz. Trimming, volume changes and tag editing aren't available, so make any cuts to the video before uploading it.
Need detailed information or want to set a different default format? Visit our specific converter pages: