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Tone Generator

Play sine, square, triangle or saw waves from 20 Hz to 20 kHz — tune instruments and test speakers.

  • Runs in your browser
  • No upload on server
  • Free, forever
  1. Add audio
  2. Adjust
  3. Download
How this works
  1. 1
    Pick a waveform

    Sine is smooth and pure, square is buzzy, triangle sits in between, saw is bright and harsh. Different jobs need different waves.

  2. 2
    Set frequency and duration

    Slide from 20 Hz (deep sub-bass) to 20 kHz (near ultrasonic). Set the length in seconds for the exported file.

  3. 3
    Play or download

    Preview through your speakers — start low, it can be loud! Download as WAV or MP3 when it sounds right.

Watch: pick a wave, set Hz, press play
440 Hz — A above middle C

Start at a low volume — high frequencies can be loud.

How this works

    Pick a frequency and wave shape, then press Play. Useful for tuning instruments (A4 = 440 Hz), testing headphones, or simple hearing checks.

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