Tone Generator
Play a pure sine, square, sawtooth, or triangle wave.
440Hz
About
Pick a frequency from 20 Hz to 20 kHz and a waveform, and the tool plays a clean tone. Useful for testing speakers, training your ear, finding the resonant frequency of a room, or scaring pets (please don't).
How to use
- Pick a frequency (Hz).
- Pick a waveform.
- Set volume and hit play.
FAQ
What can I use this for?+
Speaker frequency response tests, finding rattles in a room, ear training (440 Hz = A4), tinnitus matching, calibrating audio gear.
Why does my volume slider start low?+
Pure tones at full volume can damage hearing or speakers. The slider starts at a safe level — turn it up gradually.