What hardware details can websites see?

Websites can sometimes recognize details about the computer or phone you are using, but they do not get a complete hardware inventory. A browser may share hints about your screen, processor, graphics, or memory, while hiding exact model numbers and other sensitive details.

Use TooLab's System Info to see what your current browser makes available, then check Browser Info for details about the browser itself. These results are a useful guide, not a guarantee that every website can see the same information.

Check what your browser reveals

1. Open System Info on the device you want to check. Review the processor, graphics, screen, battery, and network details it can show.
2. Notice which details are specific and which are general hints. A browser may report a screen size or a graphics label, for example, without identifying the exact monitor or graphics card model.
3. Check the memory information carefully. If a RAM figure appears, treat it as an estimate. Browsers provide a rounded hint, not the exact installed memory capacity.
4. Open Browser Info and review its browser version, engine, privacy, permissions, and supported features. These describe the software environment, not a full list of your computer's parts.

Run the checks in the browser you normally use. Privacy settings, browser versions, and device type can change which details are available. A result from one browser is not proof that every other site sees precisely the same data.

What the results mean

Processor and graphics details are broad or missing

That is normal. Browsers may expose limited processor information, such as a hint about available processing threads, but that is not necessarily the physical core count or exact CPU model. Graphics details can be a renderer hint that is masked or generalized for privacy. A website cannot use that label alone to confirm your exact graphics card.

The RAM figure looks rounded

Browsers deliberately limit memory reporting. A website may get a broad estimate, not an exact count of installed RAM or a reliable measure of how much is currently free. For the same reason, a web page cannot verify a memory upgrade with certainty from this hint alone.

Your screen dimensions are visible

A website can often learn the browser window's size and the screen dimensions or scale used to display content. These values help a page fit its layout to your screen, but they do not necessarily identify the make or model of the display. Scaling, browser zoom, and connected monitors can affect what a page reports.

Battery or network information is absent

Not every browser exposes every feature. Battery Meter and Charger & Cable Test are available only on devices whose browser reports a battery, such as some laptops, tablets, and phones. A browser also cannot read Wi-Fi signal strength in dBm. It can measure how the connection behaves, such as response time or lost requests, but that does not reveal the radio signal reading.

A permission is listed or requested

Camera, microphone, location, and sensor access are separate from ordinary hardware hints. A site must request permission before using features that require those protected inputs, and you can deny the request. Allowing camera access does not automatically give a website a complete inventory of your device.

Limit access you do not want to allow

1. Review site permissions. In Chrome, open Settings › Privacy and security › Site settings and review permissions such as camera, microphone, and location. You can change a permission for a site or clear a previous choice. Other browsers have similar site permission controls.
2. Turn off unused device permissions. On Windows 11, open Settings › Privacy & security and choose Camera, Microphone, or Location to review access. On macOS, open System Settings › Privacy & Security and review the corresponding permission. Menu names can vary slightly by operating system version.
3. Decline requests that are not needed. A site that only displays text or images usually does not need your camera or microphone. You can deny the prompt and use the page without that feature if it is optional.
4. Use browser privacy protections, but keep expectations realistic. Tracking protection or anti-fingerprinting features can reduce some identifying signals. They do not make every browser detail invisible, and they may cause some websites to behave differently.
5. Check again after changing settings. Reload the page and repeat the check in the same browser. A permission change may take effect only after reload, and a browser update can change which information it exposes.

Hardware details are not the same as a device scan

A browser page cannot freely inspect your whole computer. It cannot normally read a motherboard serial number, search your files, or identify every installed part just because you opened a website. Some details require a supported browser feature, and some require you to choose a file or grant a specific permission.

Websites can combine ordinary signals, such as screen size and browser settings, to make a browser look more distinctive. That is sometimes called browser fingerprinting. The signals are clues, not a guaranteed identity, and privacy settings can reduce their precision. Use System Info to see the details available in your current setup, then decide which site permissions to grant based on what the site needs.