Convert MP4 to MP3
Pull the audio out of MP4 videos as MP3 at 128, 192 or 320 kbps. Free, private, runs on your device with no upload.
Drop files here or click to choose
Your files stay on this device. Nothing is uploaded.
Drop a video and get its soundtrack as MP3. Choose the bitrate: 192 kbps is transparent for most listeners; 320 for music you care about. The conversion happens on your device with FFmpeg compiled for the browser.
How it works
- Drop MP4 files (MOV, WEBM and MKV work too).
- Choose the bitrate.
- Convert and download the MP3.
This tool runs entirely in your browser. Your files are never uploaded, so there is no size limit and it works offline once loaded.
Frequently asked questions
Is it really free and private?
Yes. Everything runs in your browser with open-source code; nothing is uploaded. No account, no watermark, no file-size limit other than your device's memory.
Why does it download a 30 MB engine first?
FFmpeg runs inside your browser. It is fetched once, cached, and reused offline for every audio and video tool on this site.
Is there a length limit?
No fixed limit. Very long videos on phones may exceed available memory; trim first if a file fails.