Pick a video and keep only its sound. A lecture recording you want on your phone, a song from a video, a podcast someone sent you as an MP4 — the picture is dropped and the audio is written as an MP3.
This matters more here than with a photo. A video is the largest file most people ever convert, and every other converter for this job asks you to upload it and wait. Here the browser decodes the sound and writes the MP3 on your own machine, so there is no upload, no queue, and no copy of your recording on someone else's server.
The decoding is done by the same codecs your browser uses to play the file, which means anything that plays will convert. A browser shipped without the MP4 audio licence — some Linux builds — cannot open AAC, and the tool says so rather than producing silence.
How it works
- Choose a video file.
- Pick a quality; the estimated size updates as you do.
- Save as MP3.
Frequently asked questions
Is my video uploaded?
No. It is decoded and re-encoded in your browser, which is the point — a video is a big file, and uploading one to a converter means handing over a full copy of whatever you recorded. Nothing is sent to Utilark.
Does converting improve the sound?
No, and nothing can. The audio in an MP4 is already compressed, usually as AAC, and writing it out as MP3 compresses it a second time. Choose a higher bitrate to lose less; 192 kbps is a reasonable default and 320 kbps is as close to the source as MP3 goes.
How long a video can it handle?
The whole track is decoded into memory at once, so the limit is your device's, not a policy. Roughly twenty minutes of stereo, or twice that in mono; the tool works out the figure for your file and shows it. A longer recording is reported rather than attempted.
Which formats work?
Whatever your browser can play, which covers MP4, MOV, WebM, M4A and more. It works on audio files too, so an M4A voice memo can become an MP3 the same way.