Generate an audio tone

This tone generator creates a steady audio signal at a frequency you choose. Use it to check an output path, compare speaker behavior at a particular frequency or make a short reference file for an editing project. Enter a value from 1 to 22,000 Hz, move the logarithmic slider or adjust by one hertz at a time. Begin with low device volume and keep the page within reach of the stop button.

Frequency describes how many times the waveform repeats per second. The sine option produces a simple tone containing one frequency. Square, sawtooth and triangle waves add harmonics, giving them a different timbre even at the same fundamental frequency. Those extra components can make a waveform seem louder, so compare at modest levels. The browser limits harmonics according to its sample rate, and your speakers or headphones impose their own playback limits.

For musical references, choose A4 at 440 Hz or select a note from the piano range in the note picker. The nearest-note display follows equal temperament and shows the cents offset from that note. A positive value means the selected frequency is sharper; a negative value means it is flatter. This reading describes the generated frequency only. It does not listen to an instrument, detect a microphone pitch or tune a recording.

Choose Left, Right or Both to control where the signal goes. Playback can continue until you stop it, or end after a duration you enter. Changing a setting stops the current tone so the controls always describe the next playback. Every start and stop uses a short volume ramp to reduce clicks. Press Escape for a quick stop. If the current output sample rate cannot support a chosen frequency, the tool asks you to select a lower one.

Download WAV creates a separate file using the current frequency, waveform, volume and channel settings. Choose between one and thirty seconds for this export. The browser renders a 48 kHz stereo signal and encodes a 16-bit PCM WAV, with silence on an unselected channel and short fades at both ends. No audio is uploaded and no account is required. Use the related headphone or speaker checks for a guided sequence, the channel test for quick routing checks, or tap tempo to calculate timing values for a music project.