Audio & video
Convert MP4 to MP3
Takes the audio track out of a video and saves it as MP3.
Drop a video or audio file here
MP4, M4A, WAV, OGG · nothing is uploaded
How it works
- 1Choose a file, or drag one onto the box.
- 2The audio track is decoded by your browser's own decoder.
- 3It is re-encoded as MP3 on your machine.
- 4Download it.
Specification
- Output
- MP3
- Bit rate
- 192 kbps by default, 128–320 available
- Sample rate
- Unchanged from the source
- Length limit
- 25 minutes — the whole track is decoded into memory
- Uploads
- None — the file never leaves your browser
Questions
Does converting to MP3 lose quality?
A little, unavoidably. The source is already compressed, and re-encoding to MP3 compresses it again. At 192 kbps the difference is very hard to hear; at 320 kbps it is effectively inaudible.
Which files can I use?
Anything your browser can already play — MP4, M4A, AAC, MP3, WAV and OGG all work. MKV and WMV generally do not, because browsers do not ship decoders for them.
Is there a length limit?
25 minutes. Converting in the browser means decoding the entire track into memory first, roughly 21 MB per minute, and past that point a tab becomes unreliable. The tool refuses up front rather than crashing partway through.
Is my file uploaded anywhere?
No. Your browser's own audio decoder does the work and the encoder runs on your machine. Nothing is sent to a server.
Is this the same as "convert mp4 to mp3"?
Yes. It also gets called "video to mp3" and "extract audio from video". They all describe this one job, and this page does it.