How to generate a test tone in 3 easy steps
- 1
Pick a waveform
Choose sine, square, sawtooth or triangle from the dropdown.
- 2
Set the frequency and volume
Use the slider or type a frequency between 20 Hz and 20 kHz, and adjust the volume to a comfortable level.
- 3
Press Play
The tone starts immediately and stops when you press Stop.
Why use the tone generator tool from Super Utility Hub?
Generate a continuous test tone at any frequency from 20 Hz to 20 kHz. Choose from sine, square, sawtooth and triangle waveforms, adjust the volume, and play — a handy tool for testing speakers, checking hearing ranges, tuning instruments, or sound design.
The sine wave is the cleanest tone and ideal for calibration; square and sawtooth add harmonics that are useful for synthesizer-style experimentation.
The tone is synthesized live in your browser with zero downloads and nothing uploaded. Free and unlimited.
- Processes everything in your browser — no upload servers involved
- Free forever with unlimited uses
- Works on Windows, macOS, Linux, Android and iOS
- No watermark or branding on your output, ever
Frequently asked questions
What is the audible frequency range?
Most people hear roughly 20 Hz to 20 kHz. Use the generator to find your own hearing range — lower and higher tones become inaudible.
Which waveform should I use?
Sine is a pure single frequency — best for testing and calibration. Square, sawtooth and triangle contain harmonics and sound richer or harsher.
Is a high volume dangerous?
Loud tones can damage hearing. Start at a low volume and increase slowly; avoid prolonged high-volume listening, especially with headphones.
Can I download the tone?
Not yet — the generator plays live. Record it with the Voice Recorder if you need a file.