Convert MP4 video to MP3 audio
Drop the video and keep only the sound. It happens in your browser: nothing is uploaded, nothing is watermarked, no account.
Your file never leaves this tab: it's processed by your own browser and nothing is uploaded to us. You can go offline once the page has loaded and it still works.
- MP4
- MOV
- MKV
- WEBM
- AVI
- M4V
An MP4 is a box with two things inside: a video track and an audio track. Turning it into an MP3 is not really a conversion of the whole file — it's throwing away the picture, which is what takes up 95% of the space, and re-encoding what's left. That's why a 1 GB recording of a talk comes out as a 40 MB MP3 that sounds exactly the same.
The usual way to do this is to hand a lecture, an interview or a call recording to a website you know nothing about, wait for it to upload, and hope. Here the file never moves: the same ffmpeg those sites run on their servers runs inside your tab, which is why there's no queue, no size charged to us, and nothing for us to promise about your file.
What we handle that others don't
- The video track is dropped, not converted. That's where the size goes, and dragging it along is what leaves you with an «MP3» some players refuse to open.
- Nothing is uploaded, so there's no queue and no upload wait: on a normal laptop, an hour of video takes about a minute.
- Files up to 500 MB. The video is read as it's needed instead of being copied into memory first, which is what usually kills these tools in a browser tab.
- No watermark, no e-mail, no five-conversions-a-day. There's nothing to limit: it isn't costing us anything.
How it works
- 1
Drop the MP4
MOV, MKV, WEBM and AVI work too. It's read straight off your disk — nothing is uploaded.
- 2
Pick the quality
192 kbps is the sensible default. For a talk or an interview, 96 is plenty and weighs half.
- 3
Download the MP3
Ready for your player, your phone, or for uploading to be transcribed.
Questions
And if what you have is the video?
Upload it and you'll get the transcript with timestamps, the speakers separated by name and a summary with the key points. First 45 seconds free, no account needed.