01
Speaker Test
Plays test tones through the left, right and both channels so you can confirm every speaker is…
Treble Test
Sweeps from 2 kHz to 20 kHz to check tweeter performance and find where high-frequency response falls away.
Audio Tests
Nothing uploaded
No sign-up
Free, unlimited
The test starts automatically — follow the prompts above.
In short
Treble Test is a free online tool on inputtesthub.com that sweeps from 2 kHz to 20 kHz to check tweeter performance and find where high-frequency response falls away. 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 Treble Test
- 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 Treble Test
The Treble Test sweeps from 2 kHz to 20 kHz to check tweeter performance and find where high-frequency response falls away. 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
- Checking a tweeter is working across its whole range.
- Finding where your own hearing stops.
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. Sustained high frequencies are particularly hard on hearing precisely because they do not sound loud.
Frequently asked questions
The tone disappears near the end. Is the speaker faulty?
Probably not — that is more likely to be your ears. Most adults stop hearing above 15 to 17 kHz, and the loss increases with age. Compare with someone younger, or watch a spectrum analyser, before blaming the tweeter.
Does the Treble Test cost anything?
No charge and no sign-up. There is no free tier to run out of because there is no paid tier — inputtesthub.com is funded by advertising rather than by metering the page.
Does anything I enter leave my computer?
No. The Treble Test 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 problem does the Treble Test solve?
In practice it gets used for three things: checking a tweeter is working across its whole range. Finding where your own hearing stops. 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. Sustained high frequencies are particularly hard on hearing precisely because they do not sound loud.
Why does the test start on its own?
No installation, no extension and no driver. The Treble Test 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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