It turns a song into a finished MP4 whose bars, waves, or rings move with the music.
A visualizer video is the short path from a finished take to something you can post when you do not have a filmed performance. The wavelength, spectrum, or pulse reacts to the audio while the title and artist sit where you place them.
This page is built for that job. You add the song, pick a style and a background, then set the credits. The preview plays in the browser so you can hear the motion before you export.
When the look feels right, you download an MP4 with no watermark and no account. Ads on the page keep the tool free; they do not sit on the preview or the download button.