Convert MP4 to MP3 Online Free
Drop an MP4 file below to extract its audio as an MP3 — entirely in your browser. Nothing is uploaded.
Drop an MP4 file here
or click to browse — up to 2GB, processed on your device
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Nothing uploaded, ever. Your MP4 is decoded and re-encoded to MP3 locally, inside this browser tab.
Why convert MP4 to MP3?
MP4 files bundle video and audio together, but sometimes you only need the sound — a podcast recorded on video, a lecture, a song from a music video, or a voice memo. Converting to MP3 strips out the video track, leaving a much smaller audio-only file that plays anywhere: phones, car stereos, MP3 players, and every major app.
- Extract a podcast or interview's audio from a screen recording
- Turn a music video into a standalone MP3 for offline listening
- Shrink a large video file down to a lightweight audio file for sharing
Because everything runs locally in your browser, there's no upload wait and no privacy trade-off — even sensitive recordings never leave your device.
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Frequently asked questions
The audio track is re-encoded to MP3, a lossy format, but at standard bitrates the difference is inaudible for speech and most music. Video and any prior encoding loss in the MP4 can't be recovered.
Only the audio track is kept. The output is an MP3 file with no video.
No. Conversion runs entirely in your browser on your own device. The file is never uploaded to a server. See our Privacy Policy.