WaveMotion is a free browser music visualizer that turns a song or separate stems into an audio-reactive MP4 with no watermark and no account. Unlike visualizers that react to the full mix at once, it can link any setting to drums, bass, vocals, or synths. Build from templates or a blank canvas with 2D and 3D visualizers, GPU effects, text, images, and a real timeline. Paste lyrics or an LRC file for karaoke-style lyric videos. Export up to 4K in 16:9, 9:16, 1:1, or 4:5 for YouTube, Reels, TikTok, and Shorts. Rendering stays on your computer, so audio never leaves the browser.