Tone Generator

Play a pure tone by frequency or musical note, choose a waveform, and optionally sweep across a frequency range. Built on Web Audio — runs entirely in your browser, no network.

440 Hz (A4)

Frequency (Hz)

Note

Octave

Volume

Waveform

Duration (seconds, 0 = continuous)

Sweep end (Hz, optional)

Generated locally with Web Audio. Start at a low volume to protect your hearing.