Audio Visualizer
See live waveform and spectrum bars from your microphone or an audio file, with colour themes.
Live FFT (2048-point) at 60 fps via AnalyserNode — bars show the first half of the spectrum (up to ~22 kHz), waveform shows raw sample excursions. Everything runs locally; mic audio never leaves the browser.
About Audio Visualizer
See live waveform and spectrum bars from your microphone or an audio file, with colour themes.
Audio Visualizer uses your browser's built-in audio capabilities to test, record or generate sound with real-time visual feedback.
How to Use Audio Visualizer
- Allow microphone or speaker access when the browser asks.
- Follow the on-screen meter, waveform or controls.
- Perform the test or action you came to do.
- Read the results or download any recording.
Key Features
- Real-time meters and waveforms for clear feedback.
- Uses your browser's native audio APIs — no plugins.
- Nothing is recorded or uploaded unless you choose to download it.
Frequently Asked Questions
Why does Audio Visualizer ask for microphone permission?
Only tools that actually listen need microphone access — and permission is requested by your browser, used locally, and never sent to a server.
Is Audio Visualizer free to use?
Yes. Audio Visualizer is completely free with unlimited use — no account, download or payment required.
Is my data uploaded to a server?
No. Audio Visualizer runs entirely in your browser. Your inputs are never sent to our servers or stored anywhere.
Does Audio Visualizer work on mobile?
Yes. The interface is fully responsive and works in any modern browser on Android, iPhone, tablets and desktops.
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