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Audio visualizer and microphone spectrum
See microphone frequencies live, with the digital input level shown in dBFS.
Professional Online Audio Visualizer Features
Compare microphone frequencies and relative input levels directly in your browser.
Live Frequency Spectrum
Frequency bars show the relative strength of bass, midrange, and treble in the current microphone signal.
Digital Input Level (dBFS)
Compare the current and smoothed average signal levels with the highest sample peak in this session, all in dBFS.
Detailed Frequency Breakdown
Identify active frequency ranges from deep sub-bass to crystal high-pitched frequencies.
In-Browser Audio Analysis
The tool analyzes microphone input in your browser session; it does not send audio to ToolsBatch servers.
How to Use the Audio Visualizer in 3 Steps
Grant Microphone Access
Click 'Start Listening' and allow your browser to access your microphone input.
Make a Sound
Speak near the microphone or play a sound and watch the frequency bars respond.
View Live Levels
Watch the microphone level in dBFS and the frequency spectrum change as sound enters the microphone.
Who Uses an Online Audio Visualizer?
Essential tool for content creators, audio engineers, musicians, and educators.
Microphone & Equipment Testing
Test microphone clarity, input gain, and frequency responsiveness before recording.
Compare Room Background Sound
Compare relative background levels with the same microphone and settings; this is not a calibrated noise reading.
Pre-Stream Audio Optimization
Check voice levels before podcasts or livestreams to prevent audio distortion and clipping.
Acoustics & Physics Education
Explore how low, middle, and high frequencies appear in the live spectrum.
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Frequently Asked Questions
Is my microphone audio sent to any server?
The tool analyzes microphone input in your browser session and does not send the audio to ToolsBatch servers. Check your browser’s microphone permission before starting.
Can this replace a calibrated decibel meter?
No. dBFS shows the digital microphone signal relative to full scale. Values are usually below 0 and depend on the microphone and gain. They are not calibrated sound-pressure readings in dBA and cannot assess hearing safety.
Do I need to install any software or plugins?
No downloads are required. The visualizer works directly inside Chrome, Firefox, Safari, and Edge.
Is this online audio visualizer free?
Yes. You can use the microphone visualizer for free in your browser.
Which audio file formats are supported for visualization?
The visualizer analyzes live microphone input; it does not open audio files.