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Free Online Tone Generator

Generate a tone. Any tone. 20Hz to 20,000Hz. Sine, square, triangle, sawtooth. No sign-up. Just sound.

Sweep 20Hz to 20kHz Check speakers

Tone controls

440 Hz
Waveform

Ready. Start with low volume.

Start with the task
Run a sweep Test speakers
Use a low volume before playing any tone. Avoid loud or prolonged playback, especially with headphones.

Tune fast

Tap 440 Hz or 432 Hz and use the sound as a stable pitch reference.

Test gear

Use 40 Hz, 1 kHz, or a full sweep to check speakers and headphones.

Hear the shape

Switch waveforms and watch the line change while the sound changes.

How to use it

  1. Start low.
  2. Press play.
  3. Drag the frequency.
  4. Change the waveform if you want a different edge.
  5. Copy the link or save a WAV when you find the tone.

Common questions

Is this the same as a frequency generator?

Yes. Pick a frequency, press play, hear the tone.

Can I use headphones?

Yes, but start very low. Pure tones can feel sharp fast.

Why does the browser require a click before sound plays?

Browsers block autoplay. A click tells the browser you actually want sound.