Audio Tools
Tone Generator
Generate controlled waveforms from 20 Hz to 20 kHz at a safe starting level.
Web Audio Frequency control Waveforms Auto stop
Local by default
Your test data is processed locally in your browser and is not uploaded.
Ready to test
Safe-start tone controls
Continuous playback stops automatically after sixty seconds.
Protect your hearing
Begin at a low system volume. Do not turn up very high or low tones just because you cannot hear them.
Frequency440 Hz
Practical guide
Guides for this tool
See how this check fits into real troubleshooting workflows.
Troubleshooting
If the result is not what you expected
Check the route
Confirm the expected input or output is selected in both the OS and browser.
Close other apps
Another call or recording app may hold exclusive access to the device.
Review permissions
Allow device access for this site, then reload and start the test again.
Method
How it works
- Choose a frequency, waveform, and low playback level.
- Start the oscillator from a direct user action and adjust it smoothly.
- Stop at any time; playback also stops automatically after sixty seconds.
Browser limitations
What this result cannot prove
- A device may not reproduce very high or low frequencies even when the browser generates them.
- Do not increase volume to compensate for a tone you cannot hear.
Keep checking
Related tools
Questions
Frequently asked questions
Is the Tone Generator private?
Yes. Test input is processed in this tab and is not uploaded by this tool.
Why can browser results differ from another app?
Browsers, operating systems, permissions, device routing, and background load can all change what is exposed and measured.