01
Speaker Test
Plays test tones through the left, right and both channels so you can confirm every speaker is…
Online Tone Generator
Generates a pure tone at any frequency from 1 Hz to 22 kHz, with a choice of waveform, channel and volume.
Audio Tests
Nothing uploaded
No sign-up
Free, unlimited
The test starts automatically — follow the prompts above.
In short
Online Tone Generator is a free online tool on inputtesthub.com that generates a pure tone at any frequency from 1 Hz to 22 kHz, with a choice of waveform, channel and volume. It needs no account, no download and no payment, and there is no daily usage limit. Everything is processed inside your own browser, so the data you paste is never uploaded to a server.
How to use the Online Tone Generator
- The test starts on its own — no button to press and nothing to install.
- Follow the prompt in the test panel and watch the readings update live.
- Press Reset to start over with a clean slate.
About the Online Tone Generator
The Online Tone Generator generates a pure tone at any frequency from 1 Hz to 22 kHz, with a choice of waveform, channel and volume. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.
What people use it for
- Testing a speaker or headphone at a specific frequency.
- Tuning an instrument against A440.
- Finding a room resonance by ear.
Details
| Concert pitch A | 440 Hz |
|---|---|
| Human hearing range | about 20 Hz to 20 kHz |
| Mains hum | 50 or 60 Hz |
Start with the volume low and raise it slowly. Sustained pure tones are far more damaging to hearing than music at the same apparent loudness, and asking a small speaker to reproduce very low or very high frequencies at volume can damage the driver.
Frequently asked questions
Which waveform should I use?
Sine for testing, because it contains only the frequency you asked for. Square and sawtooth contain many harmonics, which makes them useful for hearing distortion but useless for judging a single frequency.
Nothing plays.
Browsers block audio until you interact with the page, which is why there is a play button. If it still does nothing, check the output device selected in your system settings.
Is there a limit on how often I can use the Online Tone Generator?
Free, unlimited, and no email address required. You can use it a hundred times a day and nothing changes.
Can you see what I put into this tool?
No. The Online Tone Generator runs entirely in your browser using JavaScript. Your input never reaches inputtesthub.com or any third party — open your browser's Network tab while you use it and you will see no request go out.
What do people use the Online Tone Generator for most?
The jobs it is built for: testing a speaker or headphone at a specific frequency. Tuning an instrument against A440. Finding a room resonance by ear. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
What do people usually get wrong here?
Start with the volume low and raise it slowly. Sustained pure tones are far more damaging to hearing than music at the same apparent loudness, and asking a small speaker to reproduce very low or very high frequencies at volume can damage the driver.
What are the key numbers for the Online Tone Generator?
Concert pitch A is 440 Hz. Human hearing range is about 20 Hz to 20 kHz. Mains hum is 50 or 60 Hz. These are printed on the page itself, so you do not have to take them on trust.
Does the Online Tone Generator need an app or a driver?
No installation, no extension and no driver. The Online Tone Generator uses the browser's own device APIs and begins as soon as the page loads, so there is nothing to press first. Press Reset at any point to start over with a clean slate.
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