Convert MP4 to MP3
Extract the sound from an MP4 video into an MP3 file — lectures, interviews, music videos. Runs in your browser.
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This MP4 to MP3 converter pulls the audio out of any MP4 video and saves it as an MP3 file — lectures, interviews, music videos, meeting recordings. The job runs in your browser.
The video track is never decoded — only the audio is, which makes extraction several times faster than any video conversion.
Why Use This MP4 to MP3 Tool?
- Fast — the video is never decoded, only the audio is
- Bitrate control — 320, 256, 192, 128 or 96 kbps
- Private — extracted in your browser, no upload
- Works with any MP4 that has an audio track
- Free, no signup
How to Convert MP4 to MP3 — 3 Steps
- Drop your MP4 into the box above, or tap the box to pick it from your device.
- Pick the MP3 bitrate — 192 kbps for music, 128 for voice.
- Press the blue Convert button and download the MP3.
The Audio Was the Point All Along
A lecture recorded on video that you want in your ears on a walk. An interview captured on camera for a podcast feed. A music video whose song you want offline. A screen recording whose narration should become a shareable clip. In every one of these, the video track is dead weight — sometimes hundreds of megabytes of it — and the audio alone is a few megabytes.
This extraction is deliberately efficient: the video stream is never decoded (that is the slow, heavy part of video work), only the audio track is read and re-encoded into MP3 at your chosen bitrate. That makes the job several times faster than any video conversion and light enough for phones. The source container matters less than the audio inside — MP4, WebM, MOV and MKV files are all read directly, whatever codec their audio uses.
Bitrate choice follows the material: 192 kbps or higher for music, 128 kbps for voice and interviews, 96 kbps when size rules. If the video has no audio track at all, the tool tells you plainly rather than producing an empty file.
Everything runs in your browser — decode the audio, encode, download. Lecture recordings and meeting footage stay on your device, which is exactly what you want from a tool handling those files.
Frequently Asked Questions
No — the video track is discarded and never decoded. Only the audio is processed, which makes extraction fast.
128 kbps for voice and lectures, 192 kbps for music, 320 kbps when the source audio is high quality and it matters.
The tool checks for an audio track and tells you plainly instead of producing an empty file.
Yes — the Extract Audio tool offers WAV alongside MP3.
The audio is re-encoded once as MP3 — at 192 kbps or above it is transparent for normal listening.
No — extraction runs entirely in your browser.
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