Convert MP4 to MP3
Extract the audio from any video as an MP3 — fast, free, and without your file leaving your device.
Sometimes you only need the sound: a lecture recording to listen to on a commute, music from a performance video, dialogue for transcription, or a podcast that was published as video. This tool strips the video track and encodes the audio as a standard MP3 that plays on absolutely everything.
Extraction happens entirely in your browser — the video is never uploaded, which matters both for privacy and speed. Since only the audio is being encoded, even long videos process quickly.
How to mp4 to mp3 online
- 1Drop any video file into the box — MP4, MOV, WebM, and MKV all work.
- 2Choose the MP3 quality; 192 kbps is transparent for most content.
- 3Click Convert to MP3.
- 4Download your audio file.
Frequently asked questions
What audio quality should I choose?
192 kbps is indistinguishable from the source for speech and most music. Use 320 kbps for music you care about, or 128 kbps for voice recordings where size matters most.
Can I extract audio from formats other than MP4?
Yes — the tool accepts any common video format (MOV, WebM, MKV, AVI) and even audio files you want converted to MP3.
Can I extract just part of the audio?
Trim the video first with our trim tool (which is instant), then extract audio from the trimmed clip.
Is the video uploaded to extract the audio?
No — extraction runs in your browser via WebAssembly. Nothing about your file ever reaches a server.
Related tools
Cut the clip you need in seconds — lossless, in your browser, with no upload and no watermark.
Strip the audio track from any video in seconds — no re-encoding, no quality loss, no upload.
Shrink video file size by up to 90% without an upload — your file never leaves your device.