Free online audio visualizer & waveform video maker

Yes, and please don’t pay again. Email me instead. The key shows up once, on the page Stripe sends you back to right after payment, and it is not in the Stripe receipt. Opening the payment link a second time won’t bring it back either: that link only ever opens a new checkout. So if you closed the page too fast, cleared your browser data, or moved to another computer (the unlock lives in that browser’s localStorage, not in an account), write to damienyvert.dev@gmail.com from the address you paid with and I’ll send the key back. Then open the Pro panel, click “I already have a key”, and paste it in.

Yes. No account, no watermark, no export limit, nothing uploaded. It all runs in your browser. There’s also a Pro add-on, €39 once, which adds eight more waveform styles plus a background, album art, titles, a progress bar and 4K export. The line between free and Pro can move, but the free side always keeps what a good waveform video needs, and it always keeps unlimited exports. Nothing expires. It isn’t a trial, a quota or a watermarked preview.

MP3, WAV, OGG, M4A/AAC and FLAC. Video files work too, including MP4 and the .mov an iPhone records: the audio is read straight off the track. It’s all decoded locally, in your browser.

Nowhere. The decoding, the analysis, the rendering and the MP4 encoding all happen on your device. Your file is never uploaded, and it’s never stored on a server.

The preview works in any modern browser. The MP4 export uses the WebCodecs API, so you’ll need Chrome, Edge, Opera (or another up-to-date Chromium browser) or Safari 17+.

Yes, that’s the most common thing people do here. Load the MP3, pick a style, export. You get an MP4 you can upload anywhere.

The MP4 comes out on a black background. Put it on a layer above your footage and set the blend mode to “Screen”. The black drops out and only the coloured waveform stays.

Yes, two ways. WebM with an alpha channel is a genuinely transparent video, so no blend mode needed. It works in Chrome, Edge and other Chromium browsers. Transparent frames (PNG) gives you a .zip of transparent images that any editor imports as an image sequence. That’s the transparent route that also works in Safari and Firefox, but it needs a browser from 2023 or later and it carries no audio track.

Sixteen. Eight free: bars, mirror, radial, scope, area, dots, blob and circle. Eight with Pro: ribbon, hexgrid, concentric, spiral, starburst, mesh, tunnel and bars3d. They all take the same colour, reaction and resolution controls, and the preview updates live, so click through them against your own track.

No, and no browser tool can. The encoders a browser gives you are H.264, VP9 and VP8, and ProRes isn’t one of them. If your editor really wants a true alpha asset, export Transparent frames (PNG) and import the .zip as an image sequence. Premiere Pro, Final Cut and DaVinci Resolve all take one, and the transparency survives exactly; there’s just no audio track. If you’re in Chrome, Edge or Opera and your editor reads VP9 alpha, WebM with an alpha channel is quicker.

The presets cover 1920×1080 and 2560×1440, 1080×1920 for Shorts and Stories, 1080×1080, 1080×1350, 2560×1080 ultrawide, and 3840×2160 and 2160×3840 in 4K. You can also type your own width and height. Free exports stop at 2560 px on the longest edge, and 4K comes with Pro. Bitrate runs from 1 to 30 Mbps and starts at 10, or at 16 once there’s a photo background in the frame, since a photo compresses far less kindly than a flat colour. One caveat: the render happens on your device, not on a server, so a long track at 4K asks a lot of a phone.

Yes. Nothing here limits what you do with a video you export: no watermark, no licence on the output, no credit asked. What you do need is the right to the audio you put in. The Terms put that on you, and adding a waveform to a track you don’t have permission to use doesn’t make it usable.

Only to open the page. After that the decoding, analysis, rendering and encoding all run on your machine, so you can go offline and keep working, and your audio still goes nowhere. Two things do touch the network: anonymous usage counts (formats, durations, error reasons, never a filename and never any audio), and, for the odd file your browser can’t decode on its own, a small reader module fetched when it’s needed. There’s no app to install and no offline mode to switch on, so the first load does need a connection.