Free Waveform Image Generator — No Watermark, No Upload

Seven shapes turn any audio into clean soundwave art: bars, rounded bars, blocks (equalizer), line, filled, outline, and one-sided. Thirteen color themes ship in the box — including a Space Rainbow gradient — and you can always set your own waveform and background color, or hit Invert for an instant negative.

Turn on Transparent and the background isn’t painted — the PNG drops over a video or a colored block with no white box around it. Cutout goes the other way: the waveform itself becomes a transparent hole punched through a solid block, so your footage shows through the shape when you lay it over a video. The checkerboard in the preview marks what’s transparent; it isn’t in the file.

Presets cover the usual suspects, and the picture renders at full resolution (retina-friendly) — the preview is exactly what you get:

Need another size — pick Custom and type the width and height in pixels.

In mono the waveform is symmetric around the center line. In stereo mirror the top half is the left channel and the bottom half the right, so the stereo width reads at a glance. Stereo unlocks only when the file actually has two different channels.

The audio never leaves your device. Reading the file, finding the peaks, and drawing — all in the browser (Web Audio + Canvas). We keep only anonymous, cookieless stats. So you can test unreleased demos without handing them to anyone.