Online Tone Generator
Play a pure tone at any frequency and waveform.
A pure tone on demand
A tone generator plays a single, clean frequency — the building block of sound. It is invaluable for testing audio gear, tuning by ear, hearing checks, and experiments.
Choose a frequency and one of four classic waveforms, set the volume, and press play. The tone continues until you stop it, generated live by your browser’s audio engine.
Instant and private
The sound is generated in your browser with the Web Audio API, so nothing is uploaded.
Frequently Asked Questions
What does it do?
It plays a continuous tone at the frequency and waveform you choose, using the Web Audio API.
What frequencies work?
Human hearing spans roughly 20 Hz to 20,000 Hz. Enter any value in that range and beyond.
Why would I use it?
Testing speakers and headphones, tuning instruments, ear training, and audio experiments.
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