Generate an exact frequency for testing speakers and headphones, checking your hearing range, tuning, science lessons or sound experiments. Choose sine, square, triangle or sawtooth, set any frequency with the slider or box, send it to the left, right or both speakers, play a sweep from low to high, and download any tone as a WAV file.
loading toolHow to generate a tone
- Set the frequency with the slider, the number box or a preset.
- Pick the wave shape, volume and speaker side.
- Press Play (or Play sweep), and Download WAV to keep a tone.
Good to know
- Use Left and Right to check that stereo speakers or earphones are wired the right way round.
- A sweep from 20 Hz to 20 kHz quickly shows where your speakers rattle or fade.
Questions
Why can I not hear very high or very low tones?
Most adults hear roughly 20 Hz to 15–17 kHz, and the top limit falls with age. Small phone and laptop speakers also cannot play deep bass.
Is it safe?
Start at low volume, especially with headphones, and increase slowly. Loud pure tones are tiring and can harm hearing and small speakers.
Is my data private?
Yes. Everything happens inside your own browser: nothing you type or choose is uploaded to us or anyone else.
Is it free?
Completely free, with no sign-up, no watermark and no limit on how many times you use it. Light ads keep the site running.
