Free Tone Generator Online
Generate sine, square, triangle, and sawtooth waves from 20Hz to 20kHz. No install, no sign up. 100% private.
Frequency & Test Tone Generator
Waveform Type
Quick Presets
How to Use Tone Generator Online
Select a Frequency
Use the frequency slider to choose any frequency from 20Hz to 20kHz, or select a preset for musical notes, Solfeggio frequencies, or test frequencies.
Choose Waveform Type
Select from sine, square, triangle, or sawtooth waveforms. Each waveform produces a different timbre.
Adjust Volume
Set the volume level to your preference. Start with a lower volume and increase as needed.
Play and Listen
Click "Play Tone" to start generating the tone. Click "Stop" to stop the tone.
Why Use ChangerAudio Tone Generator?
No Sign Up
No account needed. No email required. Just open and use instantly.
No Install
Works directly in your browser. No software, no plugins, no downloads.
100% Free
No watermarks, no hidden limits. Forever free for personal and commercial use.
Wide Frequency Range
Generate tones from 20Hz to 20kHz with 4 waveform types and preset frequencies.
Frequently Asked Questions
What is a tone generator?
A tone generator produces pure audio tones at specific frequencies. It's useful for audio testing, equipment calibration, music practice, meditation, and sound design.
What are the different waveform types?
Sine waves produce smooth pure tones. Square waves produce bright harsh tones. Triangle waves produce soft mellow tones. Sawtooth waves produce bright buzzy tones. Each waveform has a different harmonic content.
What are Solfeggio frequencies?
Solfeggio frequencies are a set of specific frequencies (174Hz, 285Hz, 396Hz, 417Hz, 528Hz, 639Hz, 741Hz, 852Hz, 963Hz) believed to have healing properties. They are used in meditation and sound therapy.
What frequency range can humans hear?
Humans can typically hear frequencies from 20Hz to 20kHz. Sensitivity to high frequencies decreases with age. The tone generator covers the full audible range.
Is my audio uploaded to a server?
No! All tone generation happens locally in your browser using Web Audio API. No data is transmitted to any server.
Can I use this for audio equipment testing?
Yes! The tone generator is perfect for testing speakers, headphones, amplifiers, and other audio equipment at specific frequencies.