This tool reads your MP4 file directly in the browser and encodes a MP3 copy, so there is no upload, no queue and no waiting for a server. It works on desktop and mobile.
Turn lectures, interviews, music videos and podcasts recorded as video into audio you can listen to anywhere, with a much smaller file than the original video.
Choose 192 kbps for music and 128 kbps for speech to keep files small without noticeable loss.