01
Speaker Test
Plays test tones through the left, right and both channels so you can confirm every speaker is…
Stereo Test
Confirms that stereo separation is working by playing distinct tones in each channel and then both together.
Audio Tests
Nothing uploaded
No sign-up
Free, unlimited
The test starts automatically — follow the prompts above.
In short
Stereo Test is a free online tool on inputtesthub.com that confirms that stereo separation is working by playing distinct tones in each channel and then both together. 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 Stereo 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 Stereo Test
The Stereo Test confirms that stereo separation is working by playing distinct tones in each channel and then both together. 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
- Confirming a system is playing genuine stereo and not doubled mono.
- Checking stereo after changing an audio driver or cable.
Frequently asked questions
One side plays nothing.
Try the same test with headphones. If headphones are fine, the speaker or its cable is at fault. If the same side fails on headphones too, the problem is the output device or the balance setting in your operating system's sound panel.
The left and right labels are swapped.
Check the speaker cables first, then the balance control. On a laptop, a swapped stereo image usually means an audio driver problem rather than hardware.
Is the Stereo Test free?
Free, unlimited, and no email address required. You can use it a hundred times a day and nothing changes.
Is what I paste into the Stereo Test stored?
No. The Stereo 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.
Who is the Stereo Test for?
The jobs it is built for: confirming a system is playing genuine stereo and not doubled mono. Checking stereo after changing an audio driver or cable. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Do I need to install anything to run this test?
No installation, no extension and no driver. The Stereo 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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