Tone & Frequency Generator
Create pure audio wave tones, pitch frequencies, chirps, and noise. Listen in real-time or export lossless WAV files instantly.
Waveform & Type
Human hearing ranges from 20Hz (low bass) to 20,000Hz (high treble).
Oscilloscope View
Play a tone to visualize its sound wave shape.
How to Generate Audio Tones & Sound Frequencies Online for Free
Need to test speakers, calibrate audio gear, tune an instrument, or experiment with acoustic sound frequencies? BrowserPowerToys provides a real-time tone generator powered by the native Web Audio API. Synthesize pure waveforms from 1 Hz up to 20,000 Hz directly in your browser with zero latency or downloads.
Select Waveform
Choose between Sine (pure smooth pitch), Square (rich harmonics), Sawtooth, Triangle, or Noise.
Set Frequency (Hz)
Enter any target Hertz value (e.g., standard 440 Hz concert pitch or 432 Hz) or drag the interactive slider.
Play or Sweep
Click "Play Tone" for continuous playback, or switch to Sweep mode to run acoustic frequency sweeps between two endpoints.
Export Lossless WAV
Render your synthesized frequency directly to a 16-bit PCM WAV audio file for testing, production, or sampling.
What is a Pure Tone Generator Used For?
Standard Audio Frequency & Sound Pitch Reference Chart
Common benchmark audio frequencies, musical notes, and technical testing benchmarks across the 20 Hz to 20,000 Hz spectrum:
| Frequency (Hz) | Musical Note / Term | Acoustic Range | Common Audio Application |
|---|---|---|---|
| 20 Hz | E0 (Sub-audio) | Sub-Bass | Absolute threshold of human hearing; subwoofer rumble test |
| 60 Hz | B1 (Mains Hum) | Bass | AC electrical grid hum in North America; ground loop diagnostic |
| 261.63 Hz | C4 (Middle C) | Midrange | Foundational reference pitch for Western music theory and piano |
| 440.00 Hz | A4 (Concert Pitch) | Midrange | ISO 16 standard international orchestra and instrument tuning pitch |
| 432.00 Hz | Verdi's A | Midrange | Philosophical and harmonic tuning standard (Pythagorean temperament) |
| 1,000 Hz (1 kHz) | B5 / Reference Tone | Upper Midrange | Standard broadcast lineup tone, studio calibration, gain staging |
| 10,000 Hz (10 kHz) | Treble Test | High Treble | Tweeter response test, high-frequency hearing acuity evaluation |
| 20,000 Hz (20 kHz) | Ultrasonic Ceiling | Ultra-High Treble | Theoretical ceiling of human hearing; audio DAC anti-aliasing limit |
Why Choose BrowserPowerToys Tone Generator?
- Web Audio API Accuracy: Generates crystal-clear, mathematically exact frequency oscillation without analog distortion.
- Lossless WAV Export: Download uncompressed, studio-grade audio clips up to 60 seconds with customizable sample rates.
- Comprehensive Presets: Instant one-click tuning for 432 Hz, 440 Hz (Concert A), 528 Hz (Solfeggio), and sub-bass test sweeps.
- 100% Offline Capable: Runs entirely client-side on your device’s sound card without streaming server bandwidth.
Frequently Asked Questions
Everything you need to know about processing files securely in your browser
What waveforms can this tone generator produce?
This tool can generate Sine (pure tones), Square (buzzing/retro chiptune), Sawtooth (harsh/brass-like), and Triangle (soft/mellow) waves, as well as White Noise (constant spectral density) and Pink Noise (deeper acoustic static).
How do I play a specific sound frequency?
Select the waveform type, enter the frequency in Hertz (Hz) in the input field or use the frequency slider, set the volume, and click Play Tone.
What is a frequency sweep (chirp)?
A frequency sweep transitions a tone from a starting frequency to an ending frequency over a set duration (e.g., sweeping from 200Hz to 1000Hz in 3 seconds). It is commonly used to test speaker responses.
Can I download the generated audio?
Yes, you can configure the duration of your tone, sweep, or noise, and click Download WAV to export a high-fidelity 16-bit PCM WAV file directly to your device.
Is this tone generator safe for my hearing and speakers?
Yes, but you should always start with a low volume (below 20%) and gradually increase it. Extreme high-frequency or low-frequency tones at high volumes can damage hearing or blow speaker drivers.