Open any website and, before you click a single button, it can already read a surprising amount about your machine — no Allow pop-up required. This page collects those readable details in one place so you can see them the way a site does. It is the same information used, for better and worse, to serve the right video format, adapt a layout, or build a tracking fingerprint.
What is reliable
The number of logical CPU cores, the screen and window dimensions, colour scheme and accessibility preferences, language and time zone, and media codec support are all consistent across browsers and safe to rely on.
What is approximate or browser-specific
- Device memory is only exposed by Chrome and Edge, and it is deliberately rounded to a coarse bucket (1, 2, 4, 8 GB…), so a machine with 12 GB reports 8.
- The GPU model comes from a WebGL debug extension. Firefox with anti-fingerprinting enabled, and Safari, hide or generalise it.
- OS version, CPU architecture and device model come from User-Agent Client Hints, which only Chromium browsers send. On Windows the version is blunt: Windows 11 reports as major version 13 or higher.
- Network downlink and round-trip time are the browser's rough estimates, not a measurement — use the speed test for real numbers.
- Battery status was removed from Firefox and Safari because it was being used to track people.
What a website cannot read without asking
Your exact total RAM, free disk space, CPU model and clock speed, OS build number, computer name, MAC address, installed software, and the labels of your cameras and microphones all require either a native application or an explicit permission the page has to request. This tool asks for none of them.
Some identifiers are off-limits to a browser entirely, by design. A phone's IMEI, serial number, SIM or phone number, and Android/Apple advertising ID are never exposed to a web page — not with any permission. Even native mobile apps can no longer read the IMEI on current Android and iOS. A website that claims to show your IMEI is guessing or lying.
This combination is a fingerprint
Individually these values are harmless. Together — core count, memory bucket, GPU string, screen size, time zone, language list, codec support — they form a profile distinctive enough to recognise your browser again later, even with cookies cleared. Reducing it means using a browser that normalises these signals (Tor Browser, or Firefox's resistFingerprinting), not changing individual settings.
Related tools
- Screen Resolution — physical size, PPI and mobile display details.
- User Agent Decoder — the raw UA string parsed into browser, engine and OS.
- What Is My IP — your public IPv4/IPv6 address and location.
- Internet Speed Test — measured download, upload and ping.
- Glossary — plain-English definitions of the networking terms here.