01
Keyboard Test
Test keyboard keys, inspect repeated inputs and review a local test summary. Get clear…
Device Information Checker
Shows what your device tells websites: operating system, browser, screen size, pixel ratio, cores, memory and time zone.
Device Tests
Nothing uploaded
No sign-up
Free, unlimited
The test starts automatically — follow the prompts above.
In short
Device Information Checker is a free online tool on inputtesthub.com that shows what your device tells websites: operating system, browser, screen size, pixel ratio, cores, memory and time zone. 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 Device Information Checker
- 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 Device Information Checker
The Device Information Checker shows what your device tells websites: operating system, browser, screen size, pixel ratio, cores, memory and time zone. 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
- Finding your exact screen resolution and pixel ratio for a bug report.
- Checking what a website can see about your setup.
- Reading a user agent string without opening developer tools.
Frequently asked questions
Is any of this sent anywhere?
No. It is read in your browser and shown on this page. The site's server never receives it.
My CPU core count looks wrong.
Browsers cap and round the value on purpose — many report a maximum of eight regardless of the real figure — because an exact count helps fingerprinting. The same applies to device memory, which is rounded to a power of two.
Why does my phone report a small screen size?
That is the CSS resolution, which is what pages lay out against. The device resolution is shown separately and is the CSS figure multiplied by the pixel ratio.
Is the Device Information Checker free, or is there a paid tier?
It is free, with no account, no trial and no daily cap. Every device tests tool on inputtesthub.com works the same way: open the page and use it.
Is the Device Information Checker safe to use with private information?
No. The Device Information Checker runs entirely in your browser using JavaScript. Nothing is transmitted, logged or stored, which you can verify yourself in the Network tab of your browser's developer tools.
Who is the Device Information Checker for?
The most common reasons people reach for it: finding your exact screen resolution and pixel ratio for a bug report. Checking what a website can see about your setup. Reading a user agent string without opening developer tools. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Does the Device Information Checker need an app or a driver?
No installation, no extension and no driver. The Device Information Checker 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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