About this tone generator

tonegenerator.bond is a free, no-signup online tone generator, frequency generator online, sine wave generator, and pure tone generator that runs entirely in your browser. Every hertz sound is synthesized live with the Web Audio API — no audio files, no backend rendering, no account, no upload queue. It works as a pitch generator, hertz generator, and frequency player for 20 Hz–20 kHz testing.

It was built to be better than the bare-bones generators it replaces: a logarithmic slider that matches pitch perception, a live oscilloscope visualizer, hard-capped safe volume with auto-stop, shareable URLs, client-side tone generator download (10s WAV export), an installable tone generator app experience via Add to Home Screen, and companion tools for multi tone generator layering, frequency sweep generator glides, and binaural beats. Start testing on the free online frequency generator homepage.

Safety & honesty first

Volume starts at 14% and cannot exceed 30% of system volume in the UI. High frequencies can feel loud without sounding loud, so keep tones brief and stop if anything feels uncomfortable. This tool confirms a pitch plays through your gear — it is not a calibrated instrument and not a hearing test.

Privacy

There is nothing to leak: no microphone access, no recording, no analytics audio, no uploads. See the Privacy Policy.