Frequently asked questions

An animation that reacts to audio. It reads how loud a track is and which frequencies it contains as it plays, then turns that into moving shapes. Musicians use them to give a song something to show on video platforms, which is why they are so common on YouTube music uploads.

Yes, and there is no account, no sign up and no watermark on what you export.

MP3, WAV, M4A, AAC, OGG, FLAC. Files up to 50 MB and ten minutes. Which of those actually open depends partly on your browser, since codec support varies, and you get a clear message rather than a silent failure if one will not decode.

JPG, PNG, WebP, AVIF, up to 10 MB and 6000 pixels on each side. Images are decoded in your browser and are not uploaded.

No. The file is read, decoded, analysed and rendered entirely in your browser. Nothing about the audio leaves your device. That is also why there is no upload progress bar and no queue.

Yes, as a video with a real alpha channel, either WebM with VP8 alpha or ProRes 4444. It composites over your footage in any editor. The frames are encoded in your browser with a bundled build of FFmpeg, which is the one method that keeps the alpha rather than flattening it onto black.

Chrome, Edge and Firefox support everything, including the fast video export and the transparent export. Safari can load audio, preview and export, though its video recording is less consistent, so it falls back where needed. The editor checks what your browser can do and only offers what will actually work.

A normal video export renders and encodes offline with WebCodecs, usually several times faster than the length of the track. Older browsers without WebCodecs fall back to recording in real time. The transparent export encodes with FFmpeg in the browser, which is slower, so keep those clips short.

Yes. Export at 1920 by 1080 for a standard video or 1080 by 1920 for Shorts. What you create is yours. You do need the rights to the music itself, and the platform's copyright systems will act on the audio regardless of what the video looks like.

Yes. Thickness, amplitude, level of detail, curve smoothing and fill are all adjustable, along with colour, gradient, glow, opacity, position, size and rotation. Mirrored, dual, oscilloscope and circular variants each add their own controls.

Yes. There are six: vertical bars, a smooth curve, a segmented equalizer, a dot matrix, a ridge shape and a three band meter. Bar count, spacing, corner radius, minimum height and the frequency range are all controls.

Only if you save them as a preset, which stores them in this browser. They are local to the device and are not synced to an account, because there are no accounts. Clearing site data removes them.

Most often it is too large, too long, or in a format the browser cannot decode. Files are also checked against their actual contents rather than just the extension, so a file renamed to .mp3 that is not really an MP3 will be refused. The message tells you which check failed.

Yes. The text layer takes a title and a subtitle, with control over font, size, weight, letter spacing, alignment, position, colour, opacity and shadow. You can also add a logo image with its own size, position and opacity.