Tone Generator

Play a pure sine, square or saw tone. Free, no sign-up, files stay on your device.

🔒 100% private — processing happens in your browser. Nothing is uploaded.

Online tone generator

  1. Set a frequency (or use the slider and presets).
  2. Choose the waveform and volume.
  3. Press Play — change the settings while it plays.

Test speakers and headphones, tune instruments (A4 = 440 Hz), check your hearing range or find the resonance of a room. Start with low volume — high frequencies can be unpleasant.

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