Live Audio Visualizer
Visualize your microphone audio as a live frequency spectrum using the Web Audio AnalyserNode. Nothing is uploaded.
Click Start and allow microphone access to see a live frequency spectrum.
Pure browser JavaScript — uses getUserMedia, the Web Audio AnalyserNode, and Canvas.
How to use this tool
- Click Start visualizer and allow microphone access.
- Play music or speak — the bars show the live frequency spectrum.
- Click Stop to end the visualizer and release the microphone.
Visualize your microphone audio as a live frequency spectrum using the Web Audio AnalyserNode. Nothing is uploaded.
Frequently asked questions
- What do the bars represent?
- Each bar is a frequency band from the AnalyserNode's FFT, with height proportional to that band's current loudness.
- Is the audio recorded?
- No — it is analysed in real time and discarded. Nothing is stored or uploaded.