Online Tool Store
Audio Visualizer
Play any audio file and watch a live frequency spectrum animate in sync, powered by the Web Audio API. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Choose a file to begin.
How it works
- Choose an audio file from your device.
- Click "Play" to start playback and the spectrum bars.
- Bars redraw continuously from the live frequency data of whatever is currently playing.
FAQ
Is my audio file uploaded anywhere?
No — playback and analysis both happen locally using the Web Audio API. The file never leaves your device.
Why do the bars start out static?
Browsers only allow audio playback to start after a user gesture, so the live spectrum only appears once you choose a file and click Play.
What audio formats are supported?
Whatever your browser's <audio> element supports — MP3, WAV, OGG, and M4A all typically work.
Can I save the visualization as a video?
Not currently — this renders live to the canvas for watching in the browser, with no recording or export.
How we compare
| Feature | Online Tool Store | Desktop media players | Other online converters |
|---|---|---|---|
| No file upload — runs in your browser | ✓ | ✓ | ✗ |
| No install | ✓ | ✗ | ✓ |
Some media players bundle a visualizer, but you have to install and configure them first. Audio Visualizer works the moment you open the page.