MP4 to MP3 Converter
Lectures, interviews and music videos are often far more useful as audio you can play in the background. Pulling the soundtrack out of an MP4 drops the file to a fraction of its size and gives you something any player handles.
Runs in your browser — the file is never uploaded
Drop any file to begin
Images · Documents · Data · Audio · Video — processed locally in your browser
How to convert MP4 to MP3
- 1Drop the MP4 onto the converter.
- 2Choose MP3 as the output format.
- 3Pick a bitrate — 128 kbps for speech, 192–320 kbps for music.
- 4Convert. Longer videos take a while because the work happens on your own processor.
Things worth knowing
- Use a laptop or desktop for videos over a few hundred megabytes; phone browsers run out of memory.
- Choose M4A instead of MP3 for slightly better quality at the same bitrate, if your player supports it.
MP4 to MP3 — frequently asked questions
Why does conversion take longer than other sites?
Because the video is decoded on your own device instead of a server farm. The trade-off is that your file is never uploaded and there is no queue or daily limit.
What bitrate should I choose?
128 kbps is ample for podcasts, lectures and interviews. For music, 192 kbps is a good balance and 320 kbps is effectively transparent.
Are my files uploaded to a server?
No. AllConverter runs the whole conversion inside your browser tab using WebAssembly and the Canvas API. Your file never travels over the network, which you can confirm by watching your browser's Network tab while you convert.