Precise controls
Set any frequency from 20 Hz to 20 kHz or jump to a useful preset.
Free · no signup
Tone Generator
Enter a frequency, choose a waveform and play a precise audio tone directly in your browser for speaker checks, pitch comparison and sound experiments.
Frequency440 Hz
Output is capped at 25%. Your device volume still applies.
Ready. Start with a low device volume.
Oscillator
This tool runs locally in your browser. Your input is not uploaded to WebTaskKit.
Simple by design
How to use Tone generator
- 1
Lower your device volume before starting.
- 2
Set a frequency and choose the waveform and output level.
- 3
Press Play, listen briefly, and press Stop when finished.
Four waveforms
Compare sine, square, triangle and sawtooth waves.
Click-free playback
Gentle gain ramps reduce abrupt clicks when starting and stopping.
Good to know
Frequently asked questions
What do Hz and kHz measure?
Hertz measures cycles per second. One kilohertz equals 1,000 hertz.
Why can I not hear some frequencies?
Hearing range varies by person, while speakers and headphones also have reproduction limits.
Can this calibrate equipment?
It is useful for informal checks, but browser and hardware output are not a substitute for calibrated laboratory equipment.
How can I use tones safely?
Start at a very low volume, listen briefly, avoid headphones when possible, and stop immediately if you feel discomfort.