Convert MP4 to MP3
Only the sound of the MP4 is kept, encoded again as MP3. If the file already carries MP3 audio, it’s copied as it is, with no loss.
They open in the converter with MP3 selected.
Browse filesFiles stay on your device.
What changes
Only if your MP4 already has MP3 audio does MP3 accept it as it is, so the converter copies the audio without re-encoding, in seconds and with no loss. If not, or if you change the quality, volume or trim, the audio is decoded and compressed again, and loses a little more detail.
If it’s copied, the MP3 is the same size as the MP4's audio track: far smaller than the original, since the picture is gone. If it’s re-encoded, it gets smaller: MP3 stores the same content in less space.
How big the MP3 will be
At 192 kbps, 4 min of MP3 take 5.8 MB.
When it’s worth it
Choose MP3 for: Music, podcasts, and everyday sharing. Small files that play on almost anything.
Stay with MP4 for: Phones, websites, social networks, and TV.
How to convert MP4 to MP3
- Drop the MP4 files on this page, or browse for them. Up to 200 at once.
- The converter opens with the files loaded and MP3 selected.
- Press Convert, then save each file or all of them as a ZIP.
Questions
Does converting MP4 to MP3 lose quality?
Usually a little, because the audio is compressed again. Only files that already carry a codec MP3 accepts are copied without loss.
What is the MP3 format?
A lossy codec where the audio is cut down by removing sounds the ear can’t hear, so a track keeps a reasonable size at a typical bitrate. It’s still the most widely playable audio format, which is why it’s the default for sharing music.
What is the MP4 format?
A container that holds a video track, one or more audio tracks and metadata, and nothing else: which codec sits inside is a separate question. H.264 or H.265 video with AAC audio is the combination almost everyone means by MP4.
Are the files uploaded?
No. The file is opened in this tab, converted here and saved from here. There’s no account and no watermark.
How many files can be converted at once?
Up to 200 per batch and about 2 GB per file, within the memory this device has available.