MP4 – MPEG-4 Part 14
MP4 is the most widely supported video container. It usually holds H.264 or H.265 video with AAC audio and plays on nearly every phone, computer, TV and browser.
More MP4 conversionsDrop your MP4 files here
or click to choose MP4 files · up to 95MB each
How to convert MP4 to MP3
- Choose your files. Click Select File or drag your MP4 files into the upload box. You can add many at once.
- Pick the settings. MP3 is already selected as the output format. The conversion starts as soon as a file is added.
- Download. Each file appears in the list when it is ready. Download them one by one, or all together with Download all.
Why convert MP4 to MP3?
Extracting the sound from an MP4 gives you an audio file for a lecture, podcast, interview, song or speech that you can play on any phone or music player, with a much smaller file than the video.
When to keep the MP4
Keep the MP4 if you will ever need the picture again. The MP3 contains only the sound track.
Tips for the best result
- The audio is encoded as a high-quality variable-bitrate MP3 (around 190 kbps), which suits both speech and music.
- The MP3 cannot sound better than the audio in the video, but it will not sound noticeably worse.
- Long recordings take a little longer; the file size limit applies to the video.
Common problems and fixes
- The conversion says there is no audio.
- The video has no sound track, for example a screen recording made without audio.
- The MP3 is quiet.
- The volume is kept as in the video. Use a free audio editor to normalise the volume afterwards.
MP3 – MPEG Audio Layer III
MP3 is the most widely supported lossy audio format. It makes music files small enough to share and plays on virtually every device.
More MP3 conversionsConverting MP4 to MP3
- Extracts the audio track.
Related guide
- How to extract audio from a videoSave the sound of a video as MP3, WAV or M4A for free: which format to choose for music, podcasts, editing or transcription, and how to fix common problems.
Frequently asked questions
Can I convert videos from YouTube?
Only files you have on your device and the right to use. This site converts uploaded files; it does not download from other websites.
How big will the MP3 be?
Roughly 1.4 MB per minute of audio, far smaller than the video.
What quality is the MP3?
The MP3 uses high-quality variable bitrate encoding, around 190 kbps on average, which sounds the same as the video for normal listening.
Do I need to install software?
No. Everything happens in your browser and on our server, on a computer or a phone.
Can I convert MP4 to MP3 on iPhone or Android?
Yes. Open this page in your phone browser, select the video and download the MP3. On iPhone the file is saved in the Files app.
How do I convert MP4 to MP3?
Click Select File or drop your MP4 file onto the upload box. The converted MP3 appears in the list below with a download button. You can add many files at once and download them together as a ZIP.
Is it really free?
Yes. There is no sign-up and no watermark. To keep the service available for everyone there is a 95MB limit per file and a cap on how many files one connection can process in a short period.
Are my files stored?
Your upload is used only to make the converted file. Images are processed in memory; other files are written to a private temporary folder that is deleted as soon as the conversion finishes. Nothing is kept after the result has been sent back.
Will quality drop?
For images, a little, by design: the image is re-encoded at the Quality you choose (default 75%). Audio and video are re-encoded with high-quality settings; documents keep their text and layout as far as the target format allows. Converting never restores detail that is already missing from the original.
How this works: your file is uploaded over HTTPS and converted on this server with open-source engines (libvips for images, FFmpeg for audio and video, LibreOffice and Pandoc for documents, Calibre for ebooks, Ghostscript and Inkscape for PDF and vector files). Images are processed in memory; other files use a private temporary folder that is deleted as soon as the conversion finishes.