Tone Generator
Generate sine, square, triangle, and sawtooth tones at any frequency from 20Hz to 20kHz. Free online tone generator.
How does this test work?
A tone generator creates pure audio tones at a specific frequency and waveform. Use it to test speaker frequency response, tune instruments, or check hearing range.
How to use the Tone Generator
Open the Tone Generator on any device with a modern browser — desktop, laptop, tablet, or phone. No downloads, plugins, or signup required. The tool loads instantly and works in Chrome, Firefox, Safari, Edge, and other Chromium-based browsers.
Follow the on-screen instructions to run the test. Results are displayed immediately in your browser. You can repeat the test as many times as needed. For the most accurate results, close other tabs and applications to reduce interference.
Privacy: This test runs entirely in your browser using standard web APIs. No data is collected, uploaded, or stored on any server. Camera, microphone, keyboard, mouse, and controller inputs are processed locally and never leave your device. DeviceKit does not use analytics cookies or tracking scripts.
Browser note: Some hardware values are estimated because browsers limit direct access to device hardware for security and privacy reasons. Results may vary slightly between browsers and operating systems. For the most reliable measurements, use an up-to-date version of Chrome or Edge on a desktop computer.
Frequently Asked Questions
What is a sine wave?+
A sine wave is the purest tone — a single frequency with no harmonics. It sounds smooth and clean. Square and sawtooth waves add harmonics that make the sound buzzy or bright.
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