Device Info — Live Screen, Browser, OS & System Readout
See a live readout of your own device — screen resolution, viewport, pixel ratio, CPU cores, memory, browser, OS and time zone. Free, nothing is uploaded.
Reading your device…
Everything your browser reveals about your device
Device Info reads the same signals a website sees the moment you visit: your screen resolution and current viewport size, the device pixel ratio (DPR) that separates a high-density Retina display from a standard one, color depth, the number of logical CPU cores, approximate device memory, your preferred languages, whether touch input is available, your browser and operating system, your screen orientation and its angle in degrees, your time zone, whether cookies are enabled and you are online, and the raw User-Agent string itself. Every value is read live on your own machine and shown in a labeled grid you can copy with one click.
Why these readings are useful
These are the details you reach for constantly in web development and support: reproducing a layout bug that only appears at a certain viewport or pixel ratio, confirming a media-query breakpoint, checking how many cores are available before spinning up workers, or pasting a full environment summary into a bug report so a teammate can match your setup. Screen, viewport, DPR and capability values are measured directly from your device, while the browser and OS are parsed from the User-Agent and are best treated as a strong hint — the raw User-Agent string is shown in full as the last row, so a bug report can carry it verbatim.
Frequently asked questions
Is any of my device information uploaded?
No. Every value is read locally in your browser with JavaScript and shown only to you. Nothing is sent to a server, logged, or stored, which is why there is no sign-up.
Why do the browser and OS sometimes look wrong?
Browser and operating system are parsed from the User-Agent string, which browsers self-report and increasingly freeze or trim to reduce fingerprinting. It can be spoofed or incomplete, so treat it as a strong hint — the raw string is shown in full in the last row, so you can read exactly what your browser reported and paste it into a bug report. The screen, viewport, pixel ratio and capability values are measured directly and stay accurate.
What does device pixel ratio (DPR) mean?
DPR is how many physical screen pixels map to one CSS pixel. A value of 1 is a standard display, while 2 or 3 signals a high-density Retina screen where images and canvases need extra resolution to look sharp. It updates live if you move the window between monitors with different densities.