Free tools for audio calculations and conversions. All tools run in your browser with no data sent to any server.
All Audio Tools
Opus Metadata Viewer
Drag and drop an .opus file to view its embedded metadata and transcription
Tone Generator
Generate pure sine, square, and sawtooth tones at any frequency
Multi Tone Generator
Play multiple frequencies at once with independent volume, waveform, and pulsing
Metronome
Simple metronome with adjustable BPM and time signatures
Frequency to Note Converter
Convert frequency (Hz) to musical note name and cents offset
Audio Timer
Timer with customizable audio alerts and chimes
White Noise Generator
Generate white, pink, and brown noise for focus or relaxation
Sound Level Meter
Real-time decibel meter using your microphone
Audio Frequency Spectrum Analyzer
Real-time frequency spectrum analyzer with FFT visualization from microphone
Speaker Frequency Sweep
Test speakers with a frequency sweep from 20Hz to 20kHz
Speaker Balance Test
Test left and right speaker balance with audio panning
Oscilloscope
Real-time audio waveform visualizer from microphone
Audio Latency Tester
Measure audio input/output latency in milliseconds
FFT Spectrum Viewer
Real-time frequency spectrum analyzer with bar graph display
Audio Dynamic Range Viewer
Visualize the difference between quiet and loud sounds in real-time
Sleep Sound Machine
Ambient soundscapes with drones, singing bowls, rain, ocean, and wind for sleep and meditation
Music Visualizer
Turn music into animated geometric shapes, circular waveforms, and radial patterns in real-time
Beat Consistency Visualizer
Measure rhythm timing accuracy by tapping along to music with visual feedback