Audio visualizer. Turn a song into a music video with moving spectrum bars, free, in your browser.

Questions

Is it free? Is there a watermark?

Free, with no sign-up and no watermark. Everything runs on your computer or phone.

Is my song uploaded?

No. The audio and any image you add are read inside your browser tab, and the video is made there too. Nothing is sent to a server.

What size is the video?

1920×1080 for 16:9 (YouTube), 1080×1080 for 1:1 (Instagram posts) and 1080×1920 for 9:16 (Shorts, Reels and TikTok), all at 30 frames a second. The soundtrack is the song itself, encoded as AAC.

Why did I get a WebM instead of an MP4?

Only when the browser has no H.264 video encoder, which is rare. YouTube accepts WebM; for Instagram or TikTok, make the video in a current Chrome, Edge, Firefox or Safari to get an MP4.

How long does it take?

In Chrome, Edge, Firefox and Safari 16.4 or later the video is made faster than the song plays: seconds to a minute or so for a three-minute song, depending on the computer. Browsers without a video encoder (Firefox on Android, older Safari) record it in real time instead, so keep the tab open and in front until it finishes.

Do the bars react to the actual music?

Yes. Each frame is measured from the song itself: 64 frequency bands from 40 Hz to 16 kHz, spaced like a piano keyboard so bass, mids and treble each get their share, with bars that jump on a hit and fall back smoothly.

Can I use the video for my own music?

Yes, the video is yours to post. Only use songs you have the rights to: a visualizer doesn't change who owns the music.